Materials such as layers of fiberglass or polyester are added to the asphalt to add strength to a flat roof.
Bitumen roofing products.
Wind uplift is a primary concern when installing a retrofit single ply roof system rsprs over a structural metal panel roof.
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Astm e 1592 physical testing was performed on three test roof assemblies in order to determine the wind uplift resistance of an rsprs installed over existing structural metal panel roof systems fastened directly into purlins.
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Modified bitumen roofing is a roofing asphalt.
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The resulting asphalt by product was of lower quality.
Development modified bitumen was developed because oil refineries had figured out ways to use more products from crude oil.