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  2. GAF Materials Corporation - Wikipedia

    en.wikipedia.org/wiki/GAF_Materials_Corporation

    In 2007, GAF merged with Elk Corporation, a manufacturer of asphalt felts and coatings. [11] In 2011, GAF became the first roofing manufacturer to offer a Lifetime Limited Warranty on all laminated shingles. [5] [6] GAF Energy, a sister company which offers affordable integrated rooftop solar options, was launched in 2019. [12]

  3. Thermoplastic olefin - Wikipedia

    en.wikipedia.org/wiki/ThermoPlastic_Olefin

    As in metal alloys the properties of a TPO product depend greatly upon controlling the size and distribution of the microstructure. PP and PE form lamellar crystallites separated by amorphous regions that can grow into a variety of microstructures ranging from single crystals from dilute solution crystallization to fiberous crystals and shish ...

  4. Flat roof - Wikipedia

    en.wikipedia.org/wiki/Flat_roof

    Thermoplastic polyolefin (TPO) single-ply roofing is the single most popular type of commercial low-slope roof covering as of 2016. [18] A TPO roof membrane consists of three layers: a TPO polymer base, a polyester reinforcement scrim middle layer, and a TPO polymer top ply, which are heat-fused at the factory. TPO roof membranes typically come ...

  5. Membrane roofing - Wikipedia

    en.wikipedia.org/wiki/Membrane_roofing

    Membrane roofing is a type of roofing system for buildings, RV's, 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. Western false front architecture - Wikipedia

    en.wikipedia.org/wiki/Western_false_front...

    the front façade of the building "rises to form a parapet (upper wall) which hides most or nearly all of the roof" the roof "is almost always a front gable, though gambrel and bowed roofs are occasionally found" "a better grade of materials is often used on the façade than on the sides or rear of the building" and

  7. Box gutter - Wikipedia

    en.wikipedia.org/wiki/Box_gutter

    Box gutters are essentially placed between parallel surfaces, as in a valley between parallel roofs or at the junction of a roof and a parapet wall. They should not be confused with so-called valley gutters or valley flashings which occur at the non-parallel intersection of roof surfaces, typically at right angled internal corners of pitched ...

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