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2. List of commercially available roofing materials - Wikipedia

   en.wikipedia.org/wiki/List_of_commercially...

   Roofing material is the outermost layer on the roof of a building, sometimes self-supporting, but generally supported by an underlying structure. A building's roofing material provides shelter from the natural elements. The outer layer of a roof shows great variation dependent upon availability of material, and the nature of the supporting ...

3. Covering (construction) - Wikipedia

   en.wikipedia.org/wiki/Covering_(construction)

   Roofing with large elements includes sheet metals, profiled metal or plastic trays, and corrugated fiber-cement sheets. Their waterproofing principles may involve overlapping, stapling, the application of elastomer seals, etc. Some traditional roofing materials, such as thatch or green roofs, do not fit into these two categories.

4. Bituminous waterproofing - Wikipedia

   en.wikipedia.org/wiki/Bituminous_waterproofing

   Heavier material is typically used for underlayment of longer-lived roof materials in order to match their longer life span, and on less sloped roofs, which are more susceptible to leaking. For example, two layers of No. 30 felt might be used under a slate or tile roof, whereas a single layer of No. 15 might be adequate for a steeply raked roof ...

5. Underlayment - Wikipedia

   en.wikipedia.org/wiki/Underlayment

   Underlayment may refer to: Underlay, a material placed underneath floor carpet, other flooring materials, or mattress bedding; Underlayment, a water-resistant or waterproof layer used beneath many types of commercially available roofing material. Bituminous waterproofing, systems designed to protect residential and commercial buildings

6. Underlay - Wikipedia

   en.wikipedia.org/wiki/Underlay

   Underlay is also the term for the material under roofing tiles; [1] this roofing membrane is often made of rubber and is used to seal the roof and prevent leakage. Underlayment used with roofing shingles provides a second layer of water proofing to prevent leaks and is called tar paper, roofing felt, or since the 1990s synthetic underlayment ...

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