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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. Corrugated galvanised iron - Wikipedia

   en.wikipedia.org/wiki/Corrugated_galvanised_iron

   Corrugated galvanised iron roofing in Mount Lawley, Western Australia A corrugated iron church (or tin tabernacle) in Kilburn, London Corrugated iron in the Cobar Sound Chapel, used both for the roof and as the formwork for the concrete interior Typical corrugated galvanised iron appearance, with visible large flake type patterns.

4. Metal roof - Wikipedia

   en.wikipedia.org/wiki/Metal_roof

   This allowed the sheet iron to be self-supporting when used as a roof; a contemporary account praised the material as "the lightest and strongest roof (for its weight) since the days of Adam". [7] After Palmer's patent expired in 1843, corrugated galvanized iron (CGI) became a world-wide favorite roofing material. [7]

5. PPGI - Wikipedia

   en.wikipedia.org/wiki/PPGI

   The coil coating process may be used for other substrates such as aluminium, or aluminium, stainless steel or alloy coated steel other than "pure" zinc coated steel. However, only "pure" zinc coated steel is typically referred to as PPGI. For example, PPGL may be used for pre-painted 55%Al/Zn alloy-coated steel (pre-painted GALVALUME(r) steel*)

6. Asphalt roll roofing - Wikipedia

   en.wikipedia.org/wiki/Asphalt_roll_roofing

   Roll roofing is usually restricted to a lightweight mat compared to shingles, as it must be rolled for shipment. Rolls are typically 36 inches (91 cm) by 33 feet (10 m) in size. [citation needed] Due to its light weight compared to shingles, roll roofing is regarded as an inexpensive, temporary material. Its broad width makes it vulnerable to ...

7. Asphalt shingle - Wikipedia

   en.wikipedia.org/wiki/Asphalt_shingle

   Roof orientation and ventilation can extend the service life of a roof by reducing temperatures. [13] Shingles should not be applied when temperatures are below 10 °C (50 °F), as each shingle must seal to the layer below it to form a monolithic structure. The underlying exposed asphalt must be softened by sunlight and heat to form a proper bond.