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In construction, a building or structure is waterproofed with the use of membranes and coatings to protect contents and structural integrity. The waterproofing of the building envelope in construction specifications is listed under 07 - Thermal and Moisture Protection within MasterFormat 2004, by the Construction Specifications Institute, and includes roofing and waterproofing materials.
In past decades attempts to protect concrete have included sealers ranging from wax to linseed oil. Today, high quality concrete sealers can block up to 99% of surface moisture. There are two main sealer categories: topical sealers (coatings) and penetrating sealers (reactive).
Concrete roofing is composed of concrete reinforced with fibers of some sort. Structural concrete can also be used for flat roof constructions. There are three main categories, precast/prestressed, cast-in-place and shell. There are many types of precast/prestressed concrete roofing. The following are the most common types. [8]
Clay and Concrete Tiles These tiles can last 50-100 years and are favored in hot climates or areas susceptible to fires. Pros: Great thermal properties; durable; low maintenance.
Asphalt or coal tar pitch, typically hot-applied to concrete roof decks along with reinforcement felts. Polyethylene plastic sheet, 4 or 6 thou (0.10 or 0.15 mm), 0.03 US perm (1.7 SI perm). Advanced Polyethylene vapor retarders that pass the ASTM E 1745 standard tests ≤0.3 US perm (17 SI perm).
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The main ingredients of a concrete roof tile are sand, concrete, water and colour pigments on an iron oxide basis. From the beginning, Braas gave a 30-year-guarantee on the materials of the "Frankfurter Pfanne" and was thus the first manufacturer in Germany to give long-term guarantees on building materials. [ 19 ]
League One Volleyball (LOVB), a women's professional indoor volleyball league, will launch its first season on Jan. 8. The LOVB has an experienced trio at the helm: co-founder and executive ...