Explore APP Modified Bitumen Information & Products
When built in a multi-ply assembly, the base or ply membranes are designed to provide superior waterproofing to the modified bitumen system. In a normal assembly, the base/ply membrane will be covered with a cap membrane to provide additional waterproofing and durability. Manufactured utilizing a modified bitumen co-polymer, these membranes are reinforced with polyester, fiberglass or a combination and have a variety of surfacing and thicknesses to meet any need.
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PRS Vented Base
PRS Modified Glass Base
PRS Glass Base
PRS Glass PLY IV
PRS Glass PLY VI