Protection membrane
AssigneePremier Coatings Limited
InventorsDavid R. Twyford, Edward E. Hankins
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Abstract
The invention relates to protective waterproof membranous sheeting which will prevent the passage of water and corrosive salt solutions into structures. The protection membrane comprises a bituminous adhesive waterproof sheet 1, a flexible polymeric protection grid 2 and a release sheet 3. The waterproof sheet 1 may comprise a fibre core in a matrix of a polymer modified bitumen polymer. The protection grid is partially embedded in the waterproof sheet 1, and is formed with drainage channels 13,14 on each face, provided by ribs or strands 4 and 5 defining the grid. The aperture size of the grid may be up to about 10 mm across. A filter web may be fixed to the face of the grid.
Claims12
A protection membrane comprising a bituminous adhensive waterproof sheet;
- a flexible polymeric protection grid adhered to an upper face of said sheet, a plurality of strands of polymeric material projecting from said upper face to define grid apertures, said strands extending transverse to each other so as to reinforce said waterproof sheet in two directions transverse to each other and to protect said waterproof sheet from puncturing due to impact, with at least some of said strands being at least partially embedded in said waterproof sheet.
Dependencies are inferred from the claim text.