Roofing Base Sheet Definition

The primary ply of roofing material in a roof system.

Roofing base sheet definition.

The base sheet attachment pattern is used for the p1 field of the roof and is specific to each roof assembly and is listed in the md noa for the low slope ur. A roofing base sheet is the bottom waterproofing layer on a multilayer roofing membrane system. As the heated cap sheet is pressed onto the base sheet underneath the two will fuse and form a watertight seal. Black fasteners grey plates deck type.

Chapter 15 of the hvhz portion of the florida building code requires that the base sheet be attached to the roof deck with corrosion resistant 1 1 4 ring shank nails and tin caps. The lowermost ply of roofing in a roof membrane or roof system. Next comes the second layer of torch down roofing material. Lwc pre assembled base sheet fasteners are twin legged expanding base sheet fasteners with 2 7 6 9 cm galvalume coated steel plates.

Certainteed glasbase base sheet is designed for use as a base sheet for both hot and cold applied inorganic built up roofing systems. Base sheets are surfaced with heat weldable film sand or a. Lightweight insulating concrete roof decks with minimum thickness of 1 25 3 18 cm and 1 25 3 18 cm for gypsum decks. Gafglas 75 base sheet for built up roofing bur is a premium roofing sheet with a strong fiberglass mat to prevent asphalt bleed through.

Closure strip this material is used to close the openings that are created by joining metal panels or sheets and flashing. This is asphalt enhanced with plastic or rubber polymer. It is suitable for use in the construction of various types of membranes for both new construction and reroofing over a variety of substrates. The smooth cap sheet.

As this sheet of material is rolled out on top of the base sheet the roofer will heat the underside of the cap sheet material with a torch.