SBS Asphalt Roofing Membrane High Performance Mineral Cap Sheet
Mineral cap sheet introduction:
A cap sheet is a building material used in built-up roofing, or
BUR. BUR applications are used for flat roof surfaces, and consists
of several layers of material designed to create a watertight
surface. Each layer includes asphalt or tar-caoted layers of
polyester or fiberglass mats.The more layers, or plies used in
built-up roofing, the more effectively the surface will be able to
resist leaks over time. A surfacing component, such as a cap sheet,
is used to cover and protect these lower layers and extend the life
of the roof.
Mineral cap sheet benefits:
Over time, constant sun exposure weakens asphalt and causes it to
dry out. As it dries out in the sun, a BUR roof becomes brittle and
cracks. Rain seeps into these cracks and eventually penetrates the
inside of the building, leading to leaks, mold, and rot. The cap
sheet not only protects the asphalt from the sun, but also acts as
an extra ply to further increase the integrity of the roof.
Fields of application:
Building roofs, basement, reservoir, refuse landfill, tunnel,
bathroom, parking lot, granary, bridge, dam.
Mineral cap sheet features:
1.Granulated, uncoated finish.
2.Handles like standard product-no special installation
5.More aesthetically pleasing.
Mineral surface cap sheet may be applied in either hot asphalt or
approved cold adhesive. Rolls should be stored upright, off the
ground, and completely protected from the weather. Roof decks shall
be structurally sound, dry, smooth and meet or exceed minimum
requirements of the deck manufacturer. Roof deck shall provide
polyester felt/glass fiber felt
Varied with thickness
low temperature flexibility
elongation at break