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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. These Editor-Approved Pergolas Add Shade and Privacy to Your ...

   www.aol.com/transform-backyard-time-summer...

   This pergola trades the canvas shade for a hardtop polycarbonate that won’t get weighed down with water or debris. It has a wight limit of 176 pounds so it can handle heavy snow if you want to ...

4. Reciprocal frame - Wikipedia

   en.wikipedia.org/wiki/Reciprocal_frame

   The reciprocal frame, also known as a Mandala roof, [1] has been used since the twelfth century in Chinese and Japanese architecture although little or no trace of these ancient methods remain. More recently they were used by architects Kazuhiro Ishii (the Spinning House) and Yasufumi Kijima, and engineer Yoishi Kan (Kijima Stonemason Museum).

5. Pergola - Wikipedia

   en.wikipedia.org/wiki/Pergola

   An "arbor" is also regarded as being a wooden bench seat with a roof, usually enclosed by lattice panels forming a framework for climbing plants; in evangelical Christianity, brush arbor revivals occur under such structures. [2] A pergola, on the other hand, is a much larger and more open structure.

6. Polycarbonate - Wikipedia

   en.wikipedia.org/wiki/Polycarbonate

   Polycarbonate is commonly used in eye protection, as well as in other projectile-resistant viewing and lighting applications that would normally indicate the use of glass, but require much higher impact-resistance. Polycarbonate lenses also protect the eye from UV light.

7. Sandwich panel - Wikipedia

   en.wikipedia.org/wiki/Sandwich_panel

   Sandwich panels have λ-values from 0.024 W/(m·K) for polyurethane to 0.05 W/(m·K) for mineral wool. Therefore, they can achieve different U-values depending on the core and the thickness of the panel. The installation of a system with sandwich panels minimizes thermal bridges through the joints.