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  2. List of commercially available roofing materials - Wikipedia

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

    Thermoplastics (e.g. PVC, TPO) – Plastic sheets welded together with hot air, creating one continuous sheet membrane. Lends itself well to both big box and small roof application because of its hot air weldability. This membrane is installed by two methods: 1.) Rolls of membrane are attached to the ridged insulation using a bonding adhesive; 2.)

  3. Polycarbonate - Wikipedia

    en.wikipedia.org/wiki/Polycarbonate

    The second largest consumer of polycarbonates is the construction industry, e.g. for domelights, flat or curved glazing, roofing sheets and sound walls. Polycarbonates are used to create materials used in buildings that must be durable but light.

  4. Twinwall plastic - Wikipedia

    en.wikipedia.org/wiki/Twinwall_plastic

    Although single layer polycarbonate sheeting is more flexible than polycarbonate in twinwall configuration, it still retains significant advantages over alternative materials, including glass. A typical 6mm sheet has a density of 0.72 g/cm^2 [6] and a thermal insulation R value of 0.3 m^2°C/W, while allowing 80% of visible light pass through. [7]

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