Roofing Base Sheet Definition

A roofing base sheet is the bottom waterproofing layer on a multilayer roofing membrane system.

Roofing base sheet definition.

The lowermost ply of roofing in a roof membrane or roof system. Next comes the second layer of torch down roofing material. 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. Lwc pre assembled base sheet fasteners are twin legged expanding base sheet fasteners with 2 7 6 9 cm galvalume coated steel plates.

Base sheet an asphalt impregnated or coated felt used as the first ply in some built up and modified bitumen roof systems. Base sheets are surfaced with heat weldable film sand or a. Certainteed glasbase base sheet is designed for use as a base sheet for both hot and cold applied inorganic built up roofing systems. Closure strip this material is used to close the openings that are created by joining metal panels or sheets and flashing.

It is made of fiberglass or reinforced polyester or composite reinforcement and is saturated coated with modified bitumen asphalt. The primary ply of roofing material in a roof system. An impregnated saturated or coated felt placed as the first ply in some multi ply built up and modified bitumen roof membranes. It is suitable for use in the construction of various types of membranes for both new construction and reroofing over a variety of substrates.

This is asphalt enhanced with plastic or rubber polymer. 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. The smooth cap sheet. 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.