Damp Proof Wall Membranes

Here you will find our Full Range of Damp Proof wall Membranes which include our own in-house Platinum Chemicals Brand, plus high-quality membranes from Newton® and Isola Platon®. These types of damp proof wall membranes are used when Damp-Proofing above ground walls subject to Rising Damp, Penetrating Damp or Salt Contamination. Membranes which have a Meshed Surface on one side can be finished... Read More

Damp Proof Wall Membranes

Platinum DM3 PRO-MESH Damp Proofing Membrane (3mm Stud)
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Platinum DM3 PRO-MESH Damp Proofing Membrane (3mm Stud)

£109.00 ex. VAT | £130.80 inc. VAT

Platinum DM3 PRO-MESH Damp Proofing Membrane (3mm Stud)

Platinum DM3 PRO-MESH Damp Proofing Membrane (3mm Stud)

Platinum Building Chemicals Ltd | Damp Proofing

Damp Proofing Membrane Penetrating Damp

Platinum DM3 Pro-Mesh is a composite damp proofing membrane comprising of HDPE membrane with a rot-proof HDPE mesh heat-welded during the manufacturing process to the surface of one side. The meshed surface creates a mechanical key to allow the membrane to be plastered, rendered or to receive dot & dab plasterboard.

Platinum DM3 Pro-Mesh is 0.5mm thick and has a pattern of raised 3mm studs. The studs face the wall and create air channels that allow for vapour equalisation to take place between the membrane and the wall.

Platinum DM3 Pro-Mesh is light, clean and easy to handle. It can be cut with a sharp knife, scissors or shears. The membrane is inert and is highly resistant to water, alkalies, saline solutions and organic acids, and it is not affected by minerals. It is also resistant to bacteria, fungi and other small organisms.

Platinum DM3 Pro-Mesh is guaranteed against deterioration for 30 years and has a life expectancy of at least 50 years.

Platinum DM3 Pro-Mesh has many benefits and features:

  • Provides a surface that is totally separated and unaffected by the dampness within the wall, ensuring that the wall finish will never be affected by moisture or salts
  • Superb ‘key’ for renders or plasters
  • Completely moisture-resistant but allows vapour diffusion
  • Quick and easy to install
  • In many cases the existing render can be left on the wall
  • No requirement for damaging preparation to the wall surface

Available in various Roll sizes ranging from 2.5M² to 40M².

Preparation

Clean the substrate to remove all loose debris and organic matter. Plaster should be removed as it can soften over time, which will weaken the fix of the membrane to the wall. If the wall render is in good condition, it does not have to be removed and the Platinum DM3 Pro-Mesh can be fitted directly over. If the render is damaged, local repairs may be required

Loose or crumbling render should be removed and local repairs made. If the render is in very poor condition, all of it may need to be removed

Obtain as flat a surface as possible. If the wall is undulating, better results are produced if the wall surface is dubbed-out flat with sand & cement prior to installation of the membrane, rather than dubbing out over the top of Platinum DM3 Pro-Mesh. A flat, uniform surface to the substrate means that the plaster or render above Platinum DM3 Pro-Mesh will also be uniform and less likely to have cracking caused by differential thicknesses

If evidence of bacterial growth can be seen, use a fungicidal product prior to the fitting of the membrane

If any evidence of wet rot or dry rot is seen, have it dealt with by a qualified remedial specialist

If a new slab is to be laid as part of the works, it is preferable to fit Platinum DM3 Pro-Mesh prior to the laying of the floor slab with the floor DPM extending upwards in front of the Platinum DM3 Pro-Mesh ready for the concrete pour.

Application

Cutting to Size:

Platinum DM3 Pro-Mesh can be cut with a sharp utility knife, scissors or shears

Decide whether the membrane is to be fitted horizontally or vertically

Membrane Jointing:

Joints may be made horizontally or vertically

Joints are created by butt jointing the two edges together and then oversealing the joints with Platinum Mesh Tape.

Platinum DM3 Pro-Mesh can be taken round corners. On particularly difficult shaped corners, cut the Platinum DM3 Pro-Mesh and butt joint and seal as above.

Platinum Mesh Tape should be firmly pressed into the mesh of the Platinum DM3 Pro-Mesh to facilitate the joint.

In cold and damp conditions a heat gun should be used to gently evaporate surface moisture and then to assist in pressing the Mesh Tape into the mesh of the membrane

Sealing Around Protrusions:

Where the membrane has to be cut around pipes or other protrusions, carefully cut the membrane around the protrusion and then seal around the protrusion with Newton® Sealing Mastic to ensure there is no bridging between the damp substrate and the new finish.

Fixing to the Wall:

Cut the membrane to size. Ideally, Platinum DM3 Pro-Mesh should be continued up into ceiling voids and down past the slab to the oversite. If this is not possible, cut the membrane so that it finishes tightly to the soffit and floor finish. A gap is not required at the soffit or floor, indeed the system works more efficiently when the system is not ventilated as this impedes the natural vapour drive from inside the property to the outside that still continues through the Platinum DM3 Pro-Mesh.

Platinum DM3 Pro-Mesh is fitted to the wall with the studs facing the wall and the flat meshed surface facing inwards towards the applicator. Fix the membrane to the wall with the Platinum Plaster Plugs to all substrates except when fixing to plywood or timber, when a galvanised clout nail should be used, or to slightly friable mortar substrate, when the Platinum Cob Plug should be used.

Platinum DM3 Pro-Mesh can be fitted horizontally or vertically

Fit the membrane as level as possible - best results are achieved when a long builders level or a rotating laser level is used. Care must be taken to ensure that the Platinum DM3 Pro-Mesh is pulled tight and square while fixing as this will avoid sagging or bulging which can cause problems when plastering or rendering

Using a 7mm or 8mm drill bit (depending on substrate), drill through the membrane into the wall to a depth of at least 50mm or 70mm (depending on Fixing Plug length).

  • Apply a bead of Newton® Sealing Mastic around the hole to the membrane so that when the plug is hammered home, the Mastic will seal between the plug and the membrane and so prevent migration of dampness and salting from the substrate to the wall finish.

  • Use a small number of fixings to initially fit the membrane to the wall as level as possible.

  • Once the section of membrane is on the wall add the further fixings

  • Hammer the plugs home using a wide headed hammer such as a lump hammer or mallet

  • A smaller-diameter bit can be used on softer substrate to ensure a tight fit for the plug

  • Fixing centres internally must not be greater than 250mm

  • On curved or uneven surfaces, closer fixings should be used

  • On exposed areas closer fixings are recommended, to restrain possible thermal movement

  • Fit Platinum DM3 Pro-Mesh 300mm to return walls to isolate wall finishes from dampness transmitting from the main wall being treated

  • Platinum DM3 Pro-Mesh can be taken into reveals

  • Fixing should not take place above 30°C and below -5°C.

 Finishing

General:

Platinum DM3 Pro-Mesh is suitable for wall finishes including plaster, render, hydraulic lime or plasterboard bonded to the membrane with a propriety adhesive compound.

Whilst cement based renders are prone to cracking, careful application can reduce or avoid this. Problems occur when the scratch coat has not been allowed to fully cure prior to the float coat being applied, but the most common problem we see is where the render has not been allowed to fully cure due to accelerated drying. It is extremely important that the render is slowly cured for a period of 7-10 days, longer if possible. The render gets its strength from the chemical processes that take place between the cement content and the added water. The cement needs the correct amount of water to be available to it during the whole of the curing period. If the render dries too quickly due to exposure to sunlight, wind or even dehumidification, the cement will not be able to react with water, producing a weak render that will be prone to cracking.

The render should be dampened regularly during the curing process and protected from accelerated drying with hessian and plastic sheeting.

Hairline cracking can be made good with fine fillers or alternatively a high-build masonry paint can be applied.

DO NOT APPLY DECORATIONS UNTIL PLASTERS OR RENDERS ARE THOROUGHLY DRY.

Finishing Profile:

It is recommended that renders and plasters are raised from the floor by 20-25mm to prevent bridging from the floor. Newton® 800 Finishing Profile, available in 2 metre lengths, should be fitted to the bottom of the Platinum DM3 Pro-Mesh as a plaster stop, guaranteeing that the plaster/render will stop short of the floor.

Newton® 800 Finishing Profile must be fixed at the same time as Platinum DM3 Pro-Mesh and therefore before the plaster or render is applied.

Newton® 800 Finishing Profile is not recommended where the run of wall is uneven or when the membrane is extended down past the slab. Once the finish has been applied and has dried, the 20-25mm gap to the bottom of the plaster / render should be covered by a timber skirting.

Plastering:

The recommended plaster for Platinum DM3 Pro-Mesh is Tarmac Whitewall One Coat. Please note that we do not recommend that this product is used in one single coat to our Mesh membranes.

The application of the plaster should be in two coats: 6mm scratch coat, 6mm second or float coat. If a finish coat is required this should be of 3mm.

Tarmac Whitewall should be applied in accordance with good plastering practice as described in BS 8481:2006, BS EN 13914-2:2005.

Always allow 24 hours drying time between coats of plaster. For a high impact resistant finish, use Whitewall High Impact Backing Plaster.

NOTE: Tarmac Whitewall and Tarmac Whitewall High Impact Backing Plaster are not suitable for areas of high humidity and wet areas such as swimming pool surrounds.

Rendering:

Render with a mix of sand, cement and lime should be applied in two coats using the procedures defined within BS EN 13914-1:2005 to a total thickness of 14mm. A 3mm skim coat of finishing plaster can be added once the render is fully cured

The scratch coat should be a mix of 1 part lime: 1 part cement: and 5 parts clean well-graded sharp sand. The second or float coat should be a mix of 1 part lime: 1 part cement: and 6 parts clean well graded sharp sand. The scratch coat should be 7mm and the second or float coat should be 7mm.

To lessen incidents of cracking, it is best to mix the lime and sand a day or more before use. Cement can then be added at the time of rendering.

The work should be of two coats of render and if required, a third coat of finishing plaster. The purpose of the 7mm scratch coat is to stiffen up the lath and to provide rough and absorbent, backing for subsequent coats. Work this scratch coat well into the mesh. Each 7mm coat of render should be allowed to dry for a period of not less than seven, preferably ten days, longer if possible. Cracking may occur if shorter time is allowed between coats.

It is important that the render coats are allowed to cure correctly over the 7 to 10 day period with the render dampened as required. If the scratch coat has not fully cured, slumping of the render can result.

Before applying the second or float coat, carefully drill or scratch out a small section into an area behind the mesh, within the membrane stud, to confirm that it is fully cured. The surface will cure quite quickly but the area behind the mesh must be fully cured also.

In warm periods the render should be protected from excessive drying out by covering with damp hessian sheets and plastic sheeting over it.

Dampen down the scratch coat before application of the float coat. A smooth finish is not recommended. Expansion joints should be trowelled in through the render to the membrane. These joints must be filled with a suitable flexible polymer-based sealant. Expanded metal angle beads and stop beads can be fixed where appropriate using dabs of the same material mixed as for the scratch coat.

Hydraulic Lime:

NHL (Natural Hydraulic Lime) 3.5 should be used to a combined depth of 20mm with a 10mm scratch coat and a 10mm second or float coat. The mix ratio is 2.5 parts sand to 1 part NHL, 3.5 mixed as per manufacturers instructions. The 10mm scratch coat is pushed firmly into the membrane mesh.

Check the application the day after and rub out any cracks. The surface should be thoroughly scratched without breaking the surface of the mesh. The scratch coat has to be left for a minimum of 7 days to set. It should be protected from draughts and extremes of temperature.

Before applying the second or float coat, carefully drill or scratch out a small section into an area behind the mesh, within the membrane stud, to confirm that it is set and reasonably hard. The surface will cure quite quickly but the area behind the mesh that has to be set.

The second coat is the float coat and is applied then ruled off to flatten the wall surface. The mix ratio is 2.5 parts sand to 1 part NHL 3.5 mixed as per manufacturers instructions.

The scratch coat has to be dampened down before application of the float coat.

The work has to be protected and tended as per the scratch coat. The second coat is floated or trowelled so a finish coat or a further coat can be applied

Plasterboard on Dabs:

Plaster board panels can be fixed to Platinum DM3 Pro-Mesh by the dot and dab method, giving a dry surface ready for immediate decoration. ‘Dabs’ should be applied to the heads of the Plaster Plugs, board edges and membrane to cover 50% of the Platinum DM3 Pro-Mesh.

NOTE: We do not recommend that laminated or insulated plasterboard is dot & dabbed to meshed membranes. Laminated boards have to be fixed to the wall with a mechanical fixing at each side of the board, just above half way up, so that the board does not come apart and block exits during a fire. This is a requirement of UK building code. It is not possible to mechanically fix through the laminated board without puncturing the membrane. If insulation is required to the wall build, use a Non-Meshed Membrane Damp Proofing Membrane, with an independently supported wall frame.

Data Sheets

£109.00 ex. VAT | £130.80 inc. VAT

Platinum DM2 ECO-MESH Damp Proofing Membrane (2mm Stud)
Quick Look

Platinum DM2 ECO-MESH Damp Proofing Membrane (2mm Stud)

£95.00 ex. VAT | £114.00 inc. VAT

Platinum DM2 ECO-MESH Damp Proofing Membrane (2mm Stud)

Platinum DM2 ECO-MESH Damp Proofing Membrane (2mm Stud)

Platinum Building Chemicals Ltd | Damp Proofing

Damp Proofing Membrane Penetrating Damp

Platinum DM2 Eco-Mesh Damp Proofing Membrane is a thin (PP) cavity membrane developed specifically for use when Damp-Proofing above ground walls subject to Rising Damp, Penetrating Damp or Salt Contamination.

Platinum DM2 Eco-Mesh can be finished with plaster, render or plasterboard bonded using adhesive dabs.

Unlike wet or liquid applied forms of ‘tanking’, Platinum DM2 Eco-Mesh can be worked on immediately after installation without waiting for drying or curing to occur.

The return to use time of walls damp-proofed using Platinum DM2 Eco-Mesh is significantly less than for other methods.

Available in various Roll sizes ranging from 2.5M² to 40M².

Product Uses

Platinum DM2 Eco-Mesh is unaffected by the presence of moisture or salts, making it ideal for use where conventional chemical injection damp-proofing and associated re-plastering might not work reliably or where penetrating dampness is the dominant problem.

Platinum DM2 Eco-Mesh is ideal for:

  • Barn or Mill Conversions
  • Thick Random Stone Walls
  • Contaminated chimney breasts
  • Listed Buildings
  • After a Chemical Damp Proof Course (Cream or Fluid).

The membrane can be applied to retained sound renders, brickwork, blockwork or stone, sometimes with minimal preparation when compared to waterproof rendering or ‘tanking’. Existing paint or lime-wash can be retained.

The quality and appearance of the applied finishes will be a direct reflection of the underlying substrate. Uneven, loose or soft stonework may need to be dubbed out to level off and stabilise the background.

Retaining sound cement render can be a good option if the substrate underneath is known to be in poor condition.

Gypsum based plaster, wallpaper and any buried timber must be removed as these materials can deteriorate over time and in the presence of moisture.

Platinum DM2 Eco-Mesh can be used in conjunction with other membranes and is particularly useful for lining window and door reveals where intrusion into the opening must be minimised.

Platinum DM2 Eco-Mesh is tough but pliable and is easily formed around internal and external corners.

When laying new solid floors, apply Platinum DM2 Eco-Mesh to the walls first, then lap the floor DPM up in front of the membrane. Seal as required and trim the DPM flush with the top of the finished floor.

Platinum DM2 Eco-Mesh is suitable for internal use only.

Application

Platinum DM2 Eco-Mesh is suitable for damp-proofing only.

Remove loose and soft plaster/render, wallpapers and embedded timbers. Dub out voids, hollows and loose areas of masonry using a cement mortar.

Offer up the membrane and fix in place using Platinum Plaster Plugs (a sealed Plaster Plug is always recommended, use with Platinum Waterseal Rope or Newton Sealing Mastic).

Pull the membrane as tightly as possible against the structure to minimise hollow areas behind as these can interfere with the application of plaster or plasterboard.

Fit the membrane tightly into and around corners, again to avoid damage when applying finishes.

Use 16 fixings per square metre, spaced out in a regular ‘diamond’ pattern.

In some cases, additional or alternative fixings, such as Platinum Cob Plugs may be required.

Adjacent pieces of Platinum DM2 Eco-Mesh are butted together (an overlap is not necessary), and sealed over with Platinum Mesh Tape.

Finishing

Tarmac Whitewall high impact plaster, sand and cement render (6:1 with SBR or 6:1:1 with hydrated lime) or renovating plaster are all suitable wet applied finishes. A minimum of two coats should be applied.

The initial ‘scratch’ coat should be well worked into the mesh facing, the minimum thickness should be 6mm. Allow to cure for 7-10 days before applying subsequent coats. Do not allow the plaster or render to dry out too quickly or cracking may occur.

Apply no more than a total of 15mm of render or plaster. Plasterboard can be bonded using regular ‘dab’ adhesive or Low Expansion Polyurethane Foam Adhesive (See Soudabond Easy). Apply the adhesive over the heads of the fixing plugs and ensure that 50% of the membrane area is also covered. This ensures that direct ‘through’ contact is made between the plasterboard and the masonry substrate.

Plasterboard fixed in this way can be skimmed the next day and painted or wallpapered a few days after that.

Drying times are very much reduced when compared to ‘wet’ systems.

Technical Data
Membrane Material Polypropylene (PP)
Sheet Thickness Nominal 0.5mm
Stud Height Approx 2.0mm
Construction Height Approx 2.5mm
Unit Weight 0.505 kg/m²
Working Temperature Max +60°C
Softening Temperature +160°C
Linear Coefficient of Thermal Expansion 0.18mm/m°C
Water Vapour Resistance 250M Equivalent Air Layer
Life Expectancy At least 50 years for defined applications

 

Data Sheets

£95.00 ex. VAT | £114.00 inc. VAT

Isola® Platon PB2 MESH Damp Proofing Membrane (2mm Stud)
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Isola® Platon PB2 MESH Damp Proofing Membrane (2mm Stud)

£100.00 ex. VAT | £120.00 inc. VAT

Isola® Platon PB2 MESH Damp Proofing Membrane (2mm Stud)

Isola® Platon PB2 MESH Damp Proofing Membrane (2mm Stud)

Isola | Damp Proofing

damp proofing Damp Proofing Membranes

Platon® PB2 Mesh Membrane is a thin (PP) cavity membrane developed specifically for use when Damp-Proofing above ground walls subject to Rising Damp, Penetrating Damp or Salt Contamination.

Platon® PB2 Mesh Membrane can be finished with plaster, render or plasterboard bonded using adhesive dabs.

Unlike wet or liquid applied forms of ‘tanking’, Platon® PB2 Mesh Membrane can be worked on immediately after installation without waiting for drying or curing to occur.

The return to use time of walls damp-proofed using Platon® PB2 Mesh Membrane is significantly less than for other methods.

Available in various Roll sizes ranging from 2.5M² to 40M².

Product Uses

Platon® PB2 Mesh Membrane is unaffected by the presence of moisture or salts, making it ideal for use where conventional chemical injection damp-proofing and associated re-plastering might not work reliably or where penetrating dampness is the dominant problem.

Platon® PB2 Mesh Membrane is ideal for:

  • Barn or Mill Conversions
  • Thick Random Stone Walls
  • Contaminated chimney breasts
  • Listed Buildings
  • After a Chemical Damp Proof Course (Cream or Fluid).

The membrane can be applied to retained sound renders, brickwork, blockwork or stone, sometimes with minimal preparation when compared to waterproof rendering or ‘tanking’. Existing paint or lime-wash can be retained.

The quality and appearance of the applied finishes will be a direct reflection of the underlying substrate. Uneven, loose or soft stonework may need to be dubbed out to level off and stabilise the background.

Retaining sound cement render can be a good option if the substrate underneath is known to be in poor condition.

Gypsum based plaster, wallpaper and any buried timber must be removed as these materials can deteriorate over time and in the presence of moisture.

Platon® PB2 Mesh Membrane can be used in conjunction with other Platon membranes and is particularly useful for lining window and door reveals where intrusion into the opening must be minimised.

Platon® PB2 Mesh Membrane is tough but pliable and is easily formed around internal and external corners.

When laying new solid floors, apply Platon® PB2 Mesh Membrane to the walls first, then lap the floor DPM up in front of the Platon® Membrane. Seal as required and trim the DPM flush with the top of the finished floor.

Platon® PB2 Mesh Membrane is suitable for internal use only.

Application

Platon® PB2 Mesh Membrane is suitable for damp-proofing only.

Remove loose and soft plaster/render, wallpapers and embedded timbers. Dub out voids, hollows and loose areas of masonry using a cement mortar.

Offer up the membrane and fix in place using Plaster Plugs (a sealed Plaster Plug is always recommended, use with Platinum Waterseal Rope or Newton Sealing Mastic).

Pull the membrane as tightly as possible against the structure to minimise hollow areas behind as these can interfere with the application of plaster or plasterboard.

Fit the membrane tightly into and around corners, again to avoid damage when applying finishes.

Use 16 fixings per square metre, spaced out in a regular ‘diamond’ pattern.

In some cases, additional or alternative fixings, such as Platinum Cob Plugs may be required.

Adjacent pieces of Platon® PB2 Mesh Membrane are butted together (an overlap is not necessary), and sealed over with Platinum Mesh Tape.

Finishing

Tarmac Whitewall high impact plaster, sand and cement render (6:1 with SBR or 6:1:1 with hydrated lime) or renovating plaster are all suitable wet applied finishes. A minimum of two coats should be applied.

The initial ‘scratch’ coat should be well worked into the mesh facing, the minimum thickness should be 6mm. Allow to cure for 7-10 days before applying subsequent coats. Do not allow the plaster or render to dry out too quickly or cracking may occur.

Apply no more than a total of 15mm of render or plaster. Plasterboard can be bonded using regular ‘dab’ adhesive or Low Expansion Polyurethane Foam Adhesive (See Soudabond Easy). Apply the adhesive over the heads of the fixing plugs and ensure that 50% of the membrane area is also covered. This ensures that direct ‘through’ contact is made between the plasterboard and the masonry substrate.

Plasterboard fixed in this way can be skimmed the next day and painted or wallpapered a few days after that.

Drying times are very much reduced when compared to ‘wet’ systems.

Technical Data
Membrane Material Polypropylene (PP)
Sheet Thickness Nominal 0.5mm
Stud Height Approx 2.0mm
Construction Height Approx 2.5mm
Unit Weight 0.505 kg/m²
Working Temperature Max +60°C
Softening Temperature +160°C
Linear Coefficient of Thermal Expansion 0.18mm/m°C
Water Vapour Resistance 250M Equivalent Air Layer
Life Expectancy At least 50 years for defined applications

 

Data Sheets

Technical Data Sheet

£100.00 ex. VAT | £120.00 inc. VAT

Isola Platon® Plaster Base Membrane (5mm Stud)
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Isola Platon® Plaster Base Membrane (5mm Stud)

£192.00 ex. VAT | £230.40 inc. VAT

Isola Platon® Plaster Base Membrane (5mm Stud)

Isola Platon® Plaster Base Membrane (5mm Stud)

Isola | Waterproofing Membranes

Cavity Drain Membranes Damp Proofing Membranes Waterproof Membranes

Platon® Plaster Base is a BBA Approved studded Cavity Drain Membrane for use in both Waterproofing and Damp-Proofing specifications.

The unique patented undercut stud is 'dovetail' shaped which provides a physical key for plaster and render or allows for the direct application of plasterboard on adhesive dabs. This is of particular benefit where space constraints prevent the use of timber or metal frame drylining, the installation of a blockwork liner wall or where a direct render or plaster finish is preferred, i.e a vaulted ceiling. 

Platon® Plaster Base can be used to deal with and provide isolation from Rising or Penetrating Damp, Salt Contamination and Running Water (when used in conjunction with the Aqua Channel Drainage System, Platon® P20 or Platon® P8 (when P8 is used used as the Floor Membrane) and Triton Aqua Pump & Sump Systems.

When used within a fully designed and specified waterproofing design, Platon® Plaster Base can provide a Grade 3 environment, as laid out in BS8102:2009.

Platon® Plaster Base is for use above or below ground and unlike wet or liquid applied forms of ‘tanking’ it can be worked on immediately after installation without waiting for drying or curing to occur.

  • No extensive preparation of structure
  • Water is directed behind the membrane to a drain channel for gravity drainage or a sump for pumped discharge
  • Ingressing water is de-pressurized and managed within the system and not diverted to other areas
  • Complete freedom of choice of wall finishes
  • Rapid and straightforward installation
  • Impermeable to water and water vapour
  • Reliable ‘Type C’ Waterproofing

  Platon® Plaster Base is supported by BBA Certification Certificate Number 01/3823.

Available in various Roll sizes ranging from 10M² to 40M².

Preparation

Platon® Plaster Base can be applied to retained sound renders, brickwork, blockwork, stone or concrete. The quality and appearance of the applied finishes will be a direct reflection of the underlying substrate.

All surfaces must be of a sound, firm nature and any loose areas should be removed prior to application. Uneven, loose, or soft brick/stonework may need to be dubbed out to level off and stabilise the background. Retaining sound cement render can be a good option if the substrate underneath is known to be in poor condition.

Gypsum based plaster, wallpaper and any buried timber must be removed as these materials can deteriorate over time and in the presence of moisture.  Where necessary a fungicide wash should be applied to the wall surface. Platon® Plaster Base should not be used on floors.

Remove loose and soft plaster / render, wallpaper and embedded timbers. Dub out voids, hollows and loose areas of masonry using a cement mortar. Offer up the membrane, hollow studs facing into the room, and fix in place using sealed Plaster Plugs (Sealed using Platinum Waterseal Rope).

Application

Pull the membrane as tightly as possible against the structure to minimise hollow areas behind as these can interfere with the application of plaster or plasterboard.

Use a minimum of 13 fixings per square metre, spaced out in a regular ‘diamond’ pattern no more than 250mm apart. Drill through the membrane in the centre of a 4 stud cluster, rather than through the stud itself. In some cases, additional fixings may be required in order to produce a stable and tight membrane layer.

Fit the membrane tightly into and around corners to avoid damage when applying finishes.

Platon® Plaster Base is joined by overlapping adjacent sheets by a minimum of 2 studs. Fix the Fixing Plugs as close as possible to the edge of the membrane. Fixings should be made at 150mm centres along the joint. Once all fixings are in place, clean the membrane surface thoroughly and ensure it is dry and free from dust.

Apply a Mesh Tape along the joint with equal overlaps onto each sheet of membrane and press firmly into place. If for some reason the membrane edges are in tension or are likely to try and pull apart, reinforce the joint with Corner Strip before applying the Mesh Tape.

Finishing

Most common Lightweight and Renovating Plasters (Tarmac Whitewall) or sand / cement renders can be applied to Platon® Plaster Base. (The use of British Gypsum Hardwall or Tuff Coat is not recommended). When using sand / cement renders, mixes of 1 part cement to 6 parts washed plastering sand, incorporating either SBR or Hydrated Lime should be used. NB Grade ‘M’; medium sharp sand should be used. Do not use soft or building sand.

All renders / plasters should be applied in a minimum of two coats, allowing the 1st coat of 7mm - 10mm to be trowelled firmly into the membrane studs and then scratched to provide a key for subsequent coats to be applied. The first scratch coat should be left to cure and harden. Ideally this should be 7 - 10 days depending on site & atmospheric conditions.

Do not allow the plaster or render to dry out too quickly or cracking may occur. The minimum plaster thickness should be 15mm and the maximum thickness (sand / cement 30mm) (lightweight plasters 40mm).

Plasterboard can be bonded using regular ‘dab’ adhesive or Low Expansion Polyurethane Foam Adhesive (See Soudabond Easy). Apply the adhesive over the heads of the fixing plugs and ensure that 50% of the membrane area is also covered. This ensures that direct ‘through’ contact is made between the plasterboard and the masonry substrate.

Plasterboard fixed in this way can be skimmed the next day and painted or wallpapered a few days after that. Drying times are very much reduced when compared to ‘wet’ systems.

Technical Data
Mambrane Material High Density Polyethylene (HDPE)
Sheet Thickness 0.50mm Approx.
Stud Height 5mm
Roll Weight 19.2 Kg
Air Gap Volume 3.2L/m²
Drainage Capacity 1.84L/m²

 

Data Sheets

Technical Data Sheet

System Platon® Installation Manual

BBA Certificate

£192.00 ex. VAT | £230.40 inc. VAT

Newton® 803 Newtonite Damp Proofing Membrane (3mm Stud)
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Newton® 803 Newtonite Damp Proofing Membrane (3mm Stud)

£130.00 ex. VAT | £156.00 inc. VAT

Newton® 803 Newtonite Damp Proofing Membrane (3mm Stud)

Newton® 803 Newtonite Damp Proofing Membrane (3mm Stud)

John Newton & Co. Ltd | Damp Proofing

Damp Proofing Membranes Penetrating Damp

Newton® 803 Newtonite is a composite damp proofing membrane comprising of high density polyethylene membrane with a rot-proof polythene mesh heat-welded during the manufacturing process to the surface of one side. The meshed surface creates a mechanical key to allow the membrane to be plastered, rendered or to receive dot & dab plasterboard.

Newton 803® Newtonite is one of a range of membranes within the Newton® System 800 range of Damp Proofing Membranes. If the meshed surface is not required because the wall finish will be a block wall or timber or metal frame, use Newton® 803 Non Mesh Membrane instead.

Newton® 803 Newtonite is 0.5mm thick and has a pattern of raised 3mm studs. The studs face the wall and create air channels that allow for vapour equalisation to take place between the membrane and the wall.

Newton® 803 Newtonite is light, clean and easy to handle. It can be cut with a sharp knife, scissors or shears. The membrane is inert and is highly resistant to water, alkalies, saline solutions and organic acids, and it is not affected by minerals. It is also resistant to bacteria, fungi and other small organisms.

Newton® 803 Newtonite is guaranteed against deterioration for 30 years and has a life expectancy of at least 50 years.

  Newton® 803 Newtonite is supported by BBA Certification Certificate Number 94/3010.

Newton 803 Newtonite has many benefits and features:

  • Provides a surface that is totally separated and unaffected by the dampness within the wall, ensuring that the wall finish will never be affected by moisture or salts
  • Superb ‘key’ for renders or plasters
  • Completely moisture-resistant but allows vapour diffusion
  • Quick and easy to install
  • In many cases the existing render can be left on the wall
  • No requirement for damaging preparation to the wall surface

Available in various Roll sizes ranging from 2.5M² to 40M².

Preparation

Clean the substrate to remove all loose debris and organic matter. Plaster should be removed as it can soften over time, which will weaken the fix of the membrane to the wall. If the wall render is in good condition, it does not have to be removed and the Newton® 803 Newtonite can be fitted directly over. If the render is damaged, local repairs may be required

Loose or crumbling render should be removed and local repairs made. If the render is in very poor condition, all of it may need to be removed

Obtain as flat a surface as possible. If the wall is undulating, better results are produced if the wall surface is dubbed-out flat with sand & cement prior to installation of the membrane, rather than dubbing out over the top of Newton® 803 Newtonite. A flat, uniform surface to the substrate means that the plaster or render above Newton® 803 Newtonite will also be uniform and less likely to have cracking caused by differential thicknesses

If evidence of bacterial growth can be seen, use a fungicidal product prior to the fitting of the membrane

If any evidence of wet rot or dry rot is seen, have it dealt with by a qualified remedial specialist

If a new slab is to be laid as part of the works, it is preferable to fit Newton® 803 Newtonite prior to the laying of the floor slab with the floor DPM extending upwards in front of the Newton® 803 Newtonite ready for the concrete pour.

Application

Cutting to Size:

Newton® 803 Newtonite can be cut with a sharp utility knife, scissors or shears

Decide whether the membrane is to be fitted horizontally or vertically

Membrane Jointing:

Joints may be made horizontally or vertically

Joints are created by butt jointing the two edges together and then oversealing the joints with Platinum Mesh Tape.

Newton® 803 Newtonite can be taken round corners. On particularly difficult shaped corners, cut the Newton® 805 Newlath and butt joint and seal as above.

Platinum Mesh Tape should be firmly pressed into the mesh of the Newton® 803 Newtonite to facilitate the joint.

In cold and damp conditions a heat gun should be used to gently evaporate surface moisture and then to assist in pressing the Mesh Tape into the mesh of the membrane

Sealing Around Protrusions:

Where the membrane has to be cut around pipes or other protrusions, carefully cut the membrane around the protrusion and then seal around the protrusion with Newton® Sealing Mastic to ensure there is no bridging between the damp substrate and the new finish.

Fixing to the Wall:

Cut the membrane to size. Ideally, Newton® 803 Newtonite should be continued up into ceiling voids and down past the slab to the oversite. If this is not possible, cut the membrane so that it finishes tightly to the soffit and floor finish. A gap is not required at the soffit or floor, indeed the system works more efficiently when the system is not ventilated as this impedes the natural vapour drive from inside the property to the outside that still continues through the Newton® 805 Newlath.

Newton® 803 Newtonite is fitted to the wall with the studs facing the wall and the flat meshed surface facing inwards towards the applicator. Fix the membrane to the wall with the Platinum Plaster Plugs or Newton® 800 Mesh Plugs to all substrates except when fixing to plywood or timber, when a galvanised clout nail should be used, or to slightly friable mortar substrate, when the Platinum Cob Plug or Newton 800 Cob Plug should be used.

Newton® 803 Newtonite can be fitted horizontally or vertically

Fit the membrane as level as possible - best results are achieved when a long builders level or a rotating laser level is used. Care must be taken to ensure that the Newton® 803 Newtonite is pulled tight and square while fixing as this will avoid sagging or bulging which can cause problems when plastering or rendering

Using a 7mm or 8mm drill bit (depending on substrate), drill through the membrane into the wall to a depth of at least 50mm or 70mm (depending on Fixing Plug length).

  • Apply a bead of Newton® Sealing Mastic around the hole to the membrane so that when the plug is hammered home, the Mastic will seal between the plug and the membrane and so prevent migration of dampness and salting from the substrate to the wall finish.

  • Use a small number of fixings to initially fit the membrane to the wall as level as possible.

  • Once the section of membrane is on the wall add the further fixings

  • Hammer the plugs home using a wide headed hammer such as a lump hammer or mallet

  • A smaller-diameter bit can be used on softer substrate to ensure a tight fit for the plug

  • Fixing centres internally must not be greater than 250mm

  • On curved or uneven surfaces, closer fixings should be used

  • On exposed areas closer fixings are recommended, to restrain possible thermal movement

  • Fit Newton® 803 Newtonite 300mm to return walls to isolate wall finishes from dampness transmitting from the main wall being treated

  • Newton® 803 Newtonite can be taken into reveals

  • Fixing should not take place above 30°C and below -5°C.

 Finishing

General:

Newton® 803 Newtonite is suitable for wall finishes including plaster, render, hydraulic lime or plasterboard bonded to the membrane with a propriety adhesive compound.

Whilst cement based renders are prone to cracking, careful application can reduce or avoid this. Problems occur when the scratch coat has not been allowed to fully cure prior to the float coat being applied, but the most common problem we see is where the render has not been allowed to fully cure due to accelerated drying. It is extremely important that the render is slowly cured for a period of 7-10 days, longer if possible. The render gets its strength from the chemical processes that take place between the cement content and the
added water. The cement needs the correct amount of water to be available to it during the whole of the curing period. If the render dries too quickly due to exposure to sunlight, wind or even dehumidification, the cement will not be able to react with water, producing a weak render that will be prone to cracking.

The render should be dampened regularly during the curing process and protected from accelerated drying with hessian and plastic sheeting.

Hairline cracking can be made good with fine fillers or alternatively a high-build masonry paint can be applied.

DO NOT APPLY DECORATIONS UNTIL PLASTERS OR RENDERS ARE THOROUGHLY DRY.

Finishing Profile:

It is recommended that renders and plasters are raised from the floor by 20-25mm to prevent bridging from the floor. Newton® 800 Finishing Profile, available in 2 metre lengths, should be fitted to the bottom of the Newton® 803 Newtonite as a plaster stop, guaranteeing that the plaster/render will stop short of the floor.

Newton® 800 Finishing Profile must be fixed at the same time as Newton® 803 Newtonite and therefore before the plaster or render is applied.

Newton® 800 Finishing Profile is not recommended where the run of wall is uneven or when the membrane is extended down past the slab. Once the finish has been applied and has dried, the 20-25mm gap to the bottom of the plaster / render should be covered by a timber skirting.

Plastering:

The recommended plaster for Newton® 803 Newtonite is Tarmac Whitewall One Coat. Please note that we do not recommend that this product is used in one single coat to Newton® Mesh membranes.

The application of the plaster should be in two coats: 6mm scratch coat, 6mm second or float coat. If a finish coat is required this should be of 3mm.

Tarmac Whitewall should be applied in accordance with good plastering practice as described in BS 8481:2006, BS EN 13914-2:2005.

Always allow 24 hours drying time between coats of plaster. For a high impact resistant finish, use Whitewall High Impact Backing Plaster.

NOTE: Tarmac Whitewall and Tarmac Whitewall High Impact Backing Plaster are not suitable for areas of high humidity and wet areas such as swimming pool surrounds.

Rendering:

Render with a mix of sand, cement and lime should be applied in two coats using the procedures defined within BS EN 13914-1:2005 to a total thickness of 14mm. A 3mm skim coat of finishing plaster can be added once the render is fully cured

The scratch coat should be a mix of 1 part lime: 1 part cement: and 5 parts clean well-graded sharp sand. The second or float coat should be a mix of 1 part lime: 1 part cement: and 6 parts clean well graded sharp sand. The scratch coat should be 7mm and the second or float coat should be 7mm.

To lessen incidents of cracking, it is best to mix the lime and sand a day or more before use. Cement can then be added at the time of rendering.

The work should be of two coats of render and if required, a third coat of finishing plaster. The purpose of the 7mm scratch coat is to stiffen up the lath and to provide rough and absorbent, backing for subsequent coats. Work this scratch coat well into the mesh. Each 7mm coat of render should be allowed to dry for a period of not less than seven, preferably ten days, longer if possible. Cracking may occur if shorter time is allowed between coats.

It is important that the render coats are allowed to cure correctly over the 7 to 10 day period with the render dampened as required. If the scratch coat has not fully cured, slumping of the render can result.

Before applying the second or float coat, carefully drill or scratch out a small section into an area behind the mesh, within the membrane stud, to confirm that it is fully cured. The surface will cure quite quickly but the area behind the mesh must be fully cured also.

In warm periods the render should be protected from excessive drying out by covering with damp hessian sheets and plastic sheeting over it.

Dampen down the scratch coat before application of the float coat. A smooth finish is not recommended. Expansion joints should be trowelled in through the render to the membrane. These joints must be filled with a suitable flexible polymer-based sealant. Expanded metal angle beads and stop beads can be fixed where appropriate using dabs of the same material mixed as for the scratch coat.

Hydraulic Lime:

NHL (Natural Hydraulic Lime) 3.5 should be used to a combined depth of 20mm with a 10mm scratch coat and a 10mm second or float coat. The mix ratio is 2.5 parts sand to 1 part NHL, 3.5 mixed as per manufacturers instructions. The 10mm scratch coat is pushed firmly into the membrane mesh.

Check the application the day after and rub out any cracks. The surface should be thoroughly scratched without breaking the surface of the mesh. The scratch coat has to be left for a minimum of 7 days to set. It should be protected from draughts and extremes of temperature.

Before applying the second or float coat, carefully drill or scratch out a small section into an area behind the mesh, within the membrane stud, to confirm that it is set and reasonably hard. The surface will cure quite quickly but the area behind the mesh that has to be set.

The second coat is the float coat and is applied then ruled off to flatten the wall surface. The mix ratio is 2.5 parts sand to 1 part NHL 3.5 mixed as per manufacturers instructions.

The scratch coat has to be dampened down before application of the float coat.

The work has to be protected and tended as per the scratch coat. The second coat is floated or trowelled so a finish coat or a further coat can be applied

Plasterboard on Dabs:

Plaster board panels can be fixed to Newton® 803 Newtonite by the dot and dab method, giving a dry surface ready for immediate decoration. ‘Dabs’ should be applied to the heads of the Plaster Plugs, board edges and membrane to cover 50% of the Newton® 803 Newtonite.

NOTE: We do not recommend that laminated or insulated plasterboard is dot & dabbed to Newton meshed membranes. Laminated boards have to be fixed to the wall with a mechanical fixing at each side of the board, just above half way up, so that the board does not come apart and block exits during a fire. This is a requirement of UK building code. It is not possible to mechanically fix through the laminated board without puncturing the membrane. If insulation is required to the wall build, use Newton 803 Non Meshed Membrane, with an independently supported wall frame. 

Technical Data
Membrane Material High Density Polyethylene (HDPE)
Sheet Thickness Nominal 0.7mm
Stud Height Approx 2.9mm
Construction Height Approx 3.0mm
Unit Weight 0.500 kg/m²
Working Temperature -40°C to +80°C
Softening Temperature +126°C
Thickness at 100 kPa (EN ISO 25619-1) 2.64mm
Compressive Strength - Temporary Loading (EN ISO 25619-2) >320 kPa
Compressive Strength - Permanent Loading (EN ISO 25619-1) 100 kPa
Thermal Conductivity (EN 12667) 0.461 W/mK
Water Vapour Diffusion Resistance -Sd Value (BS EN 1931) >604m
Water Vapour Diffusion Resistance - µ Value >1208000 µ
Water Vapour Diffusion Resistance >3020 MNs/g
Resistance to Fire (BS EN 13501-1) Euroclass E
Chemical Resistance - Excellent (EN 14030) 100%
Oxidation Resistance - Excellent (EN ISO 13438) 100%

 

Data Sheets

Technical Data Sheet

Newton 'System 800' Installation Instructions

Declaration of Performance (DoP)

BBA Certificate

£130.00 ex. VAT | £156.00 inc. VAT

Newton® 805 Newlath Damp Proofing Membrane (5mm Stud)
Quick Look

Newton® 805 Newlath Damp Proofing Membrane (5mm Stud)

£105.00 ex. VAT | £126.00 inc. VAT

Newton® 805 Newlath Damp Proofing Membrane (5mm Stud)

Newton® 805 Newlath Damp Proofing Membrane (5mm Stud)

John Newton & Co. Ltd | Damp Proofing

Damp Proofing Membranes Newton 805 Newton Newlath

Newton® 805 Newlath is an internally applied, composite damp proofing membrane comprising of high-density polypropylene membrane with a rot-proof polythene mesh heat welded during the manufacturing process to the surface of one side. The meshed surface creates a mechanical key to allow the membrane to be plastered, rendered or to receive dot & dab plasterboard.

Formerly Newlath 2000, Newton® 805 Newlath is one of a range of membranes within the Newton® System 800 range of Damp Proofing Membranes. If the meshed surface is not required because the wall finish will be a block wall or timber or metal frame, use Newton® 803 Non Meshed Membrane instead.

Newton® 805 Newlath is 1.5mm thick and has a pattern of raised studs linked by reinforcing ribs. The 5mm studs face the wall and create air channels that allow for vapour equalisation to take place between the membrane and the wall.

Newton® 805 Newlath is light, clean and easy to handle. It can be cut with a sharp knife, scissors or shears. The membrane is inert and is highly resistant to water, alkalies, saline solutions and organic acids, and it is not affected by minerals. It is also resistant to bacteria, fungi and other small organisms.

Newton® 805 Newlath is guaranteed against deterioration for 30 years and has a life expectancy of at least 50 years.

  Newton® 805 Newlath is supported by BBA Certification Certificate Number 94/3010.

Newton® 805 Newlath has many benefits and features:

  • Provides a surface that is totally separated and unaffected by the dampness within the wall, ensuring that the wall finish will never be affected by moisture or salts
  • Superb ‘key’ for renders or plasters
  • Completely moisture resistant but allows vapour diffusion
  • Quick and easy to install
  • In some cases, the existing render can be left on the wall
  • No requirement for damaging preparation to the wall surface

Available in various Roll sizes ranging from 7.5M² to 40M².

Preparation

Clean the substrate to remove all loose debris and organic matter. Plaster should be removed as it can soften over time, which will weaken the fix of the membrane to the wall. If the wall render is in good condition, it does not have to be removed and the Newton® 805 Newlath can be fitted directly over. If the render is damaged, local repairs may be required.

Loose or crumbling render should be removed and local repairs made. If the render is in very poor condition, all of it may need to be removed.

Obtain as flat a surface as possible. If the wall is undulating, better results are produced if the wall surface is dubbed-out flat with sand & cement prior to installation of the membrane rather than dubbing out over the top of the Newton® 805 Newlath. A flat, uniform surface to the substrate means that the plaster or render above the Newton® 805 Newlath will be uniform also and less likely to have cracking caused by differential thicknesses.

If evidence of bacterial growth can be seen, use a fungicidal product prior to the fitting of the membrane.

If any evidence of wet rot or dry rot is seen, have it dealt with by a qualified remedial specialist.

If a new slab is to be laid as part of the works, it is preferable to fit Newton® 805 Newlath prior to the laying of the floor slab with the floor DPM extending upwards in front of the Newton® 805 Newlath ready for the concrete placement.

Application

Cutting to Size:

Newton® 805 Newlath can be cut with a sharp utility knife, scissors or shears

Decide whether the membrane is to be fitted horizontally or vertically

Membrane Jointing:

Joints may be made horizontally or vertically

Joints are created by butt jointing the two edges together and then oversealing the joints with Platinum Mesh Tape.

Newton® 805 Newlath can be taken round corners. On particularly difficult shaped corners, cut the Newton® 805 Newlath and butt joint and seal as above.

Platinum Mesh Tape should be firmly pressed into the mesh of the Newton® 805 Newlath to facilitate the joint.

In cold and damp conditions a heat gun should be used to gently evaporate surface moisture and then to assist in pressing the Mesh Tape into the mesh of the membrane

Sealing Around Protrusions:

Where the membrane has to be cut around pipes or other protrusions, carefully cut the membrane around the protrusion and then seal around the protrusion with Newton® Sealing Mastic to ensure there is no bridging between the damp substrate and the new finish.

Fixing to the Wall:

Cut the membrane to size. Ideally, Newton® 805 Newlath should be continued up into ceiling voids and down past the slab to the oversite. If this is not possible, cut the membrane so that it finishes tightly to the soffit and floor finish. A gap is not required at the soffit or floor, indeed the system works more efficiently when the system is not ventilated as this impedes the natural vapour drive from inside the property to the outside that still continues through the Newton® 805 Newlath.

Newton® 805 Newlath is fitted to the wall with the studs facing the wall and the flat meshed surface facing inwards towards the applicator. Fix the membrane to the wall with the Platinum Plaster Plugs or Newton® 800 Mesh Plugs to all substrates except when fixing to plywood or timber, when a galvanised clout nail should be used, or to slightly friable mortar substrate, when the Platinum Cob Plug or Newton® 800 Cob Plug should be used.

Newton® 805 Newlath can be fitted horizontally or vertically

Fit the membrane as level as possible - best results are achieved when a long builders level or a rotating laser level is used. Care must be taken to ensure that the Newton® 805 Newlath is pulled tight and square while fixing as this will avoid sagging or bulging which can cause problems when plastering or rendering

Using a 7mm or 8mm drill bit (depending on substrate), drill through the membrane into the wall to a depth of at least 50mm or 70mm (depending on Fixing Plug length).

  • Apply a bead of Newton® Sealing Mastic around the hole to the membrane so that when the plug is hammered home, the Mastic will seal between the plug and the membrane and so prevent migration of dampness and salting from the substrate to the wall finish.

  • Use a small number of fixings to initially fit the membrane to the wall as level as possible.

  • Once the section of membrane is on the wall add the further fixings

  • Hammer the plugs home using a wide headed hammer such as a lump hammer or mallet

  • A smaller-diameter bit can be used on softer substrate to ensure a tight fit for the plug

  • Fixing centres internally must not be greater than 250mm

  • On curved or uneven surfaces, closer fixings should be used

  • On exposed areas closer fixings are recommended, to restrain possible thermal movement

  • Fit Newton® 805 Newlath 300mm to return walls to isolate wall finishes from dampness transmitting from the main wall being treated

  • Newton® 805 Newlath can be taken into reveals

  • Fixing should not take place above 30°C and below -5°C.

 Finishing

General:

Newton® 805 Newlath is suitable for wall finishes including plaster, render, hydraulic lime or plasterboard bonded to the membrane with a propriety adhesive compound.

Whilst cement based renders are prone to cracking, careful application can reduce or avoid this. Problems occur when the scratch coat has not been allowed to fully cure prior to the float coat being applied, but the most common problem we see is where the render has not been allowed to fully cure due to accelerated drying. It is extremely important that the render is slowly cured for a period of 7-10 days, longer if possible. The render gets its strength from the chemical processes that take place between the cement content and the
added water. The cement needs the correct amount of water to be available to it during the whole of the curing period. If the render dries too quickly due to exposure to sunlight, wind or even dehumidification, the cement will not be able to react with water, producing a weak render that will be prone to cracking.

The render should be dampened regularly during the curing process and protected from accelerated drying with hessian and plastic sheeting.

Hairline cracking can be made good with fine fillers or alternatively a high-build masonry paint can be applied.

DO NOT APPLY DECORATIONS UNTIL PLASTERS OR RENDERS ARE THOROUGHLY DRY.

Finishing Profile:

It is recommended that renders and plasters are raised from the floor by 20-25mm to prevent bridging from the floor. Newton® 800 Finishing Profile, available in 2 metre lengths, should be fitted to the bottom of the Newton® 805 Newlath as a plaster stop, guaranteeing that the plaster/render will stop short of the floor.

Newton® 800 Finishing Profile must be fixed at the same time as Newton® 805 Newlath and therefore before the plaster or render is applied.

Newton® 800 Finishing Profile is not recommended where the run of wall is uneven or when the membrane is extended down past the slab. Once the finish has been applied and has dried, the 20-25mm gap to the bottom of the plaster / render should be covered by a timber skirting.

Plastering:

The recommended plaster for Newton® 805 Newlath is Tarmac Whitewall One Coat. Please note that we do not recommend that this product is used in one single coat to Newton® Mesh membranes.

The application of the plaster should be in two coats: 6mm scratch coat, 6mm second or float coat. If a finish coat is required this should be of 3mm.

Tarmac Whitewall should be applied in accordance with good plastering practice as described in BS 8481:2006, BS EN 13914-2:2005.

Always allow 24 hours drying time between coats of plaster. For a high impact resistant finish, use Whitewall High Impact Backing Plaster.

NOTE: Tarmac Whitewall and Tarmac Whitewall High Impact Backing Plaster are not suitable for areas of high humidity and wet areas such as swimming pool surrounds.

Rendering:

Render with a mix of sand, cement and lime should be applied in two coats using the procedures defined within BS EN 13914-1:2005 to a total thickness of 14mm. A 3mm skim coat of finishing plaster can be added once the render is fully cured

The scratch coat should be a mix of 1 part lime: 1 part cement: and 5 parts clean well-graded sharp sand. The second or float coat should be a mix of 1 part lime: 1 part cement: and 6 parts clean well graded sharp sand. The scratch coat should be 7mm and the second or float coat should be 7mm.

To lessen incidents of cracking, it is best to mix the lime and sand a day or more before use. Cement can then be added at the time of rendering.

The work should be of two coats of render and if required, a third coat of finishing plaster. The purpose of the 7mm scratch coat is to stiffen up the lath and to provide rough and absorbent, backing for subsequent coats. Work this scratch coat well into the mesh. Each 7mm coat of render should be allowed to dry for a period of not less than seven, preferably ten days, longer if possible. Cracking may occur if shorter time is allowed between coats.

It is important that the render coats are allowed to cure correctly over the 7 to 10 day period with the render dampened as required. If the scratch coat has not fully cured, slumping of the render can result.

Before applying the second or float coat, carefully drill or scratch out a small section into an area behind the mesh, within the membrane stud, to confirm that it is fully cured. The surface will cure quite quickly but the area behind the mesh must be fully cured also.

In warm periods the render should be protected from excessive drying out by covering with damp hessian sheets and plastic sheeting over it.

Dampen down the scratch coat before application of the float coat. A smooth finish is not recommended. Expansion joints should be trowelled in through the render to the membrane. These joints must be filled with a suitable flexible polymer-based sealant. Expanded metal angle beads and stop beads can be fixed where appropriate using dabs of the same material mixed as for the scratch coat.

Hydraulic Lime:

NHL (Natural Hydraulic Lime) 3.5 should be used to a combined depth of 20mm with a 10mm scratch coat and a 10mm second or float coat. The mix ratio is 2.5 parts sand to 1 part NHL, 3.5 mixed as per manufacturers instructions. The 10mm scratch coat is pushed firmly into the membrane mesh.

Check the application the day after and rub out any cracks. The surface should be thoroughly scratched without breaking the surface of the mesh. The scratch coat has to be left for a minimum of 7 days to set. It should be protected from draughts and extremes of temperature.

Before applying the second or float coat, carefully drill or scratch out a small section into an area behind the mesh, within the membrane stud, to confirm that it is set and reasonably hard. The surface will cure quite quickly but the area behind the mesh that has to be set.

The second coat is the float coat and is applied then ruled off to flatten the wall surface. The mix ratio is 2.5 parts sand to 1 part NHL 3.5 mixed as per manufacturers instructions.

The scratch coat has to be dampened down before application of the float coat.

The work has to be protected and tended as per the scratch coat. The second coat is floated or trowelled so a finish coat or a further coat can be applied

Plasterboard on Dabs:

Plaster board panels can be fixed to Newton® 805 Newlath by the dot and dab method, giving a dry surface ready for immediate decoration. ‘Dabs’ should be applied to the heads of the Plaster Plugs, board edges and membrane to cover 50% of the Newton® 805 Newlath.

NOTE: We do not recommend that laminated or insulated plasterboard is dot & dabbed to Newton meshed membranes. Laminated boards have to be fixed to the wall with a mechanical fixing at each side of the board, just above half way up, so that the board does not come apart and block exits during a fire. This is a requirement of UK building code. It is not possible to mechanically fix through the laminated board without puncturing the membrane. If insulation is required to the wall build, use Newton 803 Non Meshed Membrane, with an independently supported wall frame. 

Technical Data
Membrane Material High Density Polypropylene (HDPP)
Sheet Thickness Nominal 1.5mm
Stud Height Approx 2.9mm
Construction Height Approx 5.0mm
Unit Weight 0.500 kg/m²
Working Temperature -40°C to +80°C
Softening Temperature +148°C
Thermal Conductivity (EN 12667) 0.48 W/mK
Water Vapour Diffusion Resistance -Sd Value (BS EN 1931) 200m
Water Vapour Diffusion Resistance - µ Value >400000 µ
Water Vapour Diffusion Resistance >1000 MNs/g
Resistance to Fire (BS EN 13501-1) Euroclass E
Chemical Resistance - Excellent (EN 14030) 100%
Oxidation Resistance - Excellent (EN ISO 13438) 100%

 

Data Sheets

Technical Data Sheet

Newton 'System 800' Installation Instructions

Declaration of Performance (DoP)

BBA Certificate

£105.00 ex. VAT | £126.00 inc. VAT

Newton® 803 Non-Meshed Damp Proofing Membrane (3mm Stud)
Quick Look

Newton® 803 Non-Meshed Damp Proofing Membrane (3mm Stud)

£170.00 ex. VAT | £204.00 inc. VAT

Newton® 803 Non-Meshed Damp Proofing Membrane (3mm Stud)

Newton® 803 Non-Meshed Damp Proofing Membrane (3mm Stud)

John Newton & Co. Ltd | Damp Proofing

Damp Proofing Membranes Newton 803 Non-Meshed Membrane

Newton® 803 Non-Meshed Membrane is a high quality damp proofing membrane for use above the ground as an alternative to Newton® 803 Newtonite and Newton® 805 Newlath where a meshed surface is not required as a surface for direct plastering or rendering, typically where the wall finish to the damp proof membrane is timber battens, a dry-lining frame or block wall.

Newton® 803 is guaranteed against deterioration for 30 years, has a life expectancy of at least 50 years (DIN 9001:2000) and inert and is highly resistant to water, alkalies, saline solutions and organic acids, and it is not affected by minerals and is also resistant to bacteria, fungi and other small organisms.

Newton® 803 is 0.65mm thick and has a pattern of raised 3mm studs and is light, clean and easy to handle. It can be cut with a sharp knife, scissors or shears. The studs face the wall and create air channels that allow for vapour equalisation to take place between the membrane and the wall.

Newton® 803 has many benefits and features:

  • Isolation of wall finish from the damp wall
  • Does not require extensive and damaging preparation to the wall surface
  • Speed of installation
  • Resistant to efflorescing salts and hydrocarbon contamination
  • Rot-proof
  • Shallow stud profile for where space is at a premium

Newton 803 is the same membrane as Newton 503 but does NOT hold an Agrément Certificate. If an Agrément Certificate is required, please use Newton 503 Cavity Drain Membrane.

Available in various Roll sizes ranging from 10M² to 40M².

Preparation

Clean the substrate to remove all loose debris and organic matter. Plaster should be removed as it can soften over time, which will weaken the fix of the membrane to the wall. If the wall render is in good condition, it does not have to be removed and the Newton® 803 can be fitted directly over. Loose or crumbling render should be removed.

If evidence of bacterial growth can be seen, use a fungicidal product prior to the fitting of the membrane.

If any evidence of wet rot or dry rot is seen, have it dealt with by a qualified remedial specialist.

If a new slab is to be laid as part of the works, it is preferable to fit Newton® 803 prior to the laying of the floor slab with the floor DPM extending upwards in front of the Newton® 803 ready for the concrete placement.

Application

Cutting to Size:

Newton® 803 can be cut with a sharp utility knife, scissors or shears

Decide whether the membrane is to be fitted horizontally or vertically

Membrane Jointing:

Joints may be made horizontally or vertically.

Fit the edge of the next length of membrane adjacent to the previous sheet with a butt-joint. Overtape the butt-joint with Platinum Corner Strip or Newton® Overtape.

Newton® 803 can be taken round corners. Try to fit the membrane square with neat creases to the internal and external corners. Where the membrane starts to be misshapen due to the contours of the wall, cut the membrane and start again with a new butt-joint secured with Platinum Corner Strip or Newton® Overtape.

In cold and damp conditions a heat gun should be used to gently evaporate surface moisture prior to the application of the Platinum Corner Strip or Newton® Overtape.

Fixing to the Wall:

Cut the membrane to size. Ideally, Newton® 803 should be continued up into ceiling voids and down past the slab to the oversite. If this is not possible, cut the membrane so that it finishes tightly to the soffit and floor finish. A gap is not required at the soffit or floor, indeed the system works more efficiently when the system is not ventilated as this impedes the natural vapour drive from inside the property to the outside that still continues through the Newton® 803.

Newton® 803 is fitted to the wall with the studs facing the wall and the flat surface facing inwards towards the applicator. Fix the membrane to the wall with the Newton® MultiPlug (or Platinum Brick Plugs & Seals) to all substrates except to slightly friable mortar substrate, when the Newton® 800 Cob Plug (or Platinum Cob Plugs) should be used.

Newton® 803 can be fitted horizontally or vertically. Fit the membrane as level as possible - best results are achieved when a long builders level or a rotating laser level is used.

Using a 10mm drill bit, drill through the membrane into the wall to a depth of at least 60mm.

Fix only as many plugs as are required to fix the membrane neatly to the wall

If fixings are required for fixing of timber battens, brackets for Gypliner type dry-lining frame or wall ties, add further plugs to the correct centres required for the wall lining.

Hammer the plugs home using a wide headed hammer such as a lump hammer or mallet.

Fit Newton® 803 to return walls to isolate wall finishes from dampness transmitting from the main wall being treated.

Newton® 803 can be taken into reveals.

Using Newton MultiPlugs (Or Platinum Brick Plugs) for Fixing:

Both the Newton® MultiPlug and the Platinum Brick Plugs have a hollow core that is designed to receive 5mm self-tapping screws. Use either plug to secure timber battens or locating brackets from wall lining systems. Heavier items can be supported by screwing a piece of chipboard to the plugs at fairly close centres and then fixing the heavier item to the chipboard in a conventional way

Fixing Heavier Objects to the Wall:

Heavier objects should be attached to the wall using resin anchors. Seal around the resin anchor with Newton® Sealing Mastic.

Technical Data
Membrane Material High Density Polyethylene (HDPE)
Sheet Thickness Nominal 0.60mm
Stud Height Approx 2.9mm
Construction Height Approx 3.5mm
Unit Weight 0.500 kg/m²
Working Temperature -40°C to +80°C
Softening Temperature +126°C
Compressive Strength - Temporary Loading (EN ISO 25619-2) >320 kPa
Compressive Strength - Permanent Loading (EN ISO 25619-1) 100 kPa
Thermal Conductivity (EN 12667) 0.461 W/mK
Water Vapour Diffusion Resistance -Sd Value (BS EN 1931) 604m
Water Vapour Diffusion Resistance - µ Value >1208000 µ
Water Vapour Diffusion Resistance >3020 MNs/g
Resistance to Fire (BS EN 13501-1) Euroclass E
Chemical Resistance - Excellent (EN 14030) 100%
Oxidation Resistance - Excellent (EN ISO 13438) 100%

 

Data Sheets

Technical Data Sheet

Declaration of Performance (DoP)

£170.00 ex. VAT | £204.00 inc. VAT