| http://www.w3.org/ns/prov#value | - ModelFeatures and CompositionBenefits, Drawbacks and WarrantyColours and TypesAsphalt Covering Multilayer roofing including three layers of organic felt combined with molten asphalt; a final coat of gravel is poured on topBenefits: Very popular due to its low cost;Requires the addition of gravel to protect the surface from UV rays;Drawbacks:Risk of fire during installation;10-year warrantyBlack, g
|
