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 products. If the meshed surface is not required because the wall finish will be a block wall or timber or metal frame, use Newton 803 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, has a life expectancy of at least 50 years and is supported by BBA Certification Certificate Number 94/3010.