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How To Damp Proof Walls
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Platinum DM3 Pro-Mesh is a High Quality, 3mm Stud, Meshed Damp Proof Membrane comprising of HDPE Membrane with a rot-proof HDPE mesh on the surface of one side, perfect for damp proofing. 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 available in 1.0 Metre, 1.2 Metre and 2.0 Metre Widths.
Available in various Roll sizes ranging from 2.5M² to 40M².
Read our Guide on 'How To Identify & Treat Rising Dampness On Walls' and 'How To Install a Damp Proof Membrane'.
Membrane size
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Platinum DM3 Pro-Mesh is a composite damp proof 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.
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
Platinum Mesh Fix Plaster Plugs - For Fixing the Membrane to the substrate.
Newton 801-M Sealing Mastic - To provide a damp proof seal around the base of the fixing head.
Platinum Neoprene Sealing Washers - Alternative method to provide a damp proof seal around the fixing head.
Platinum Cob Plugs - For Fixing the Membrane to poorer quality substrates (i.e Cob Walls).
Platinum Mesh Tape - Jointing Tape made from a butyl rubber compound with a polypropylene fleece finish, used where a surface ‘key’ is required for plastering or rendering over.
Newton 800 Finishing Profile - Can be fitted to the bottom of the membrane as a 'plaster stop', guaranteeing that the plaster / render will stop short of the floor.
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.
Platinum DM3 Pro-Mesh can be cut with a sharp utility knife, scissors or shearsDecide whether the membrane is to be fitted horizontally or vertically
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
