Roofing Base Sheet Definition

Black fasteners grey plates deck type.

Roofing base sheet definition.

It is suitable for use in the construction of various types of membranes for both new construction and reroofing over a variety of substrates. Next comes the second layer of torch down roofing material. Base sheets are surfaced with heat weldable film sand or a. This is asphalt enhanced with plastic or rubber polymer.

The smooth cap sheet. 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. Lwc pre assembled base sheet fasteners are twin legged expanding base sheet fasteners with 2 7 6 9 cm galvalume coated steel plates.

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. The primary ply of roofing material in a roof system. A roofing base sheet is the bottom waterproofing layer on a multilayer roofing membrane system. It is made of fiberglass or reinforced polyester or composite reinforcement and is saturated coated with modified bitumen asphalt.

The lowermost ply of roofing in a roof membrane or roof system. As the heated cap sheet is pressed onto the base sheet underneath the two will fuse and form a watertight seal. Lightweight insulating concrete roof decks with minimum thickness of 1 25 3 18 cm and 1 25 3 18 cm for gypsum decks. Base sheet an asphalt impregnated or coated felt used as the first ply in some built up and modified bitumen roof systems.

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.