John Newton & Co. Ltd | Damp Proof Membranes
Newton 803 is a High Quality, NON-MESHED Damp Proofing Membrane for use above the ground. Newton 803 can be used as an alternative to Newton 803 Newtonite and Newton 805 Newlath where a meshed surface is not required, typically where the wall finish to the damp proof membrane is timber battens, a dry-lining frame or block wall.
Supplied in (W) 2.0M x (L) 20M (40M²) Rolls.
Read our Guide on 'How To Identify & Treat Rising Dampness On Walls'
Newton 803 Non-Meshed Damp Proofing Membrane is a high quality damp proof 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 Damp Proofing Membrane 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 Damp Proofing Membrane 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.
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
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.
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.
Newton 803 can be cut with a sharp utility knife, scissors or shears
Decide whether the membrane is to be fitted horizontally or vertically
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.
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.
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
Heavier objects should be attached to the wall using resin anchors. Seal around the resin anchor with Newton Mastic Sealant.
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