Roofing felts bituminous

Waterproof. Waterproofing barrier systems may be either hot- or cold-appHed. The hot-appHed generaUy involve a bituminous material such as asphalt used in conjunction with a reinforcing fabric such as roofing felt, cotton, or glass cloth. Cold-appHed can be bituminous or elastomeric materials either in Hquid or sheet form, with or without fabric reinforcement. Liquid elastomeric treatments include neoprene, polyurethanes, and blends of these or epoxies with bituminous materials. Among the commonly used precured elastomeric sheet materials are neoprene, polyisobutylene, EPDM mbber, and plasticized PVC. Polyethylene and PVC films and nonwoven plastic or glass fabric coated with bituminous materials also find use (78). Because these... 

Glass fiber mats and textiles are utilized in the manufacture of bituminous roofing felt and for carpet backing. Glass fiber textiles are also used in the manufacture of printed circuit boards and in the manufacture of grinding disks. Since they are non-inflammable, glass fibers are incorporated into noncombustible textiles such as fireprottf curtain fabrics. 

Dressing compound n. Bituminous liquid used hot or cold for dressing the exposed surface of roofing felt. 

Mineral Surfaced Roofing Felt or fabric saturated with bitumen, coated on one or both sides with a bituminous coating and surfaced on its weather side with mineral granules. 

The built-up roof membrane consists of bitumen, reinforced with roofing felts, and aggregates which protect the bitumen from the UV radiation and oxidation. Bituminous materials have been used since 3500 BC. Because of their waterproofing, preservative, and binder characteristics, they were utilized by the ancients for the construction of houses and roads. " Bituminous materials were also used by ancient civilizations such as Egyptians for construction, mummification, waterproofing, preservatives, and binders. 

Built-Up Roofing. Built-up roofing (BUR) is a continuous-membrane covering manufactured on-site from alternate layers of bitumen, bitumen-saturated or coated felts, or asphalt-impregnated glass mats and surfacings. These membranes are generally appHed with hot bitumens or cold apphed bituminous adhesives (qv). 

Cold-process roofing n. A bituminous roofing membrane, which consists of layers of coated felts that have been bonded with cold-applied asphalt roof cement and surfaced with an emulsified or cutback asphalt roof coating. 

In the traditional waterproofing systems, bitumen (or bituminous felt) was used commonly in the so-called built-up roofs. Since the introduction of plastic films, sheets of mainly... 

Most types of roofing materials are bituminous and synthetic (polymeric) roofing membranes. The most commonly used roofing and waterproofing membrane is made by combining asphalt or coal tar pitch (bitumen) with felts or mats, or fabrics of organic or inorganic fibers. 

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