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2. Covering (construction) - Wikipedia

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

   In construction, covering is the exterior layer of a building's roof. The covering ensures waterproofing by directing and collecting rainwater . It also provides mechanical protection against various external elements such as dust and intrusions.

3. Flat roof - Wikipedia

   en.wikipedia.org/wiki/Flat_roof

   Any sheet of material used to cover a flat or low-pitched roof is usually known as a membrane and the primary purpose of these membranes is to waterproof the roof area. Materials that cover flat roofs typically allow the water to run off from a slight inclination or camber into a gutter system. Water from some flat roofs such as on garden sheds ...

4. 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 ...

5. Membrane roofing - Wikipedia

   en.wikipedia.org/wiki/Membrane_roofing

   Membrane roofing is a type of roofing system for buildings, RVs, ponds, and, in some cases, tanks. It is used to create a watertight covering to protect the interior of a building. Membrane roofs are most commonly made from synthetic rubber, thermoplastic (PVC or similar material), or modified bitumen. Membrane roofs are most commonly used in ...

6. List of roof shapes - Wikipedia

   en.wikipedia.org/wiki/List_of_roof_shapes

   Satari: A Swedish variant on the monitor roof; a double hip roof with a short vertical wall usually with small windows, popular from the 17th century on formal buildings. [citation needed] (Säteritak in Swedish.) Mansard (French roof): A roof with the pitch divided into a shallow slope above a steeper slope. The steep slope may be curved.

7. Purlin - Wikipedia

   en.wikipedia.org/wiki/Purlin

   The purlins are the large beams perpendicular to the rafters; from this shot, it appears that there are three purlins on either side of the roof. The sheathing boards are sometimes called the roof deck and are painted white. A purlin (or historically purline, purloyne, purling, perling) is a longitudinal, horizontal, structural member in a roof.