A flat roof is a type of roofing design where the roof deck is almost level and does not have a pronounced slope. It is typically made of a waterproof membrane or multiple layers of materials, including a drainage layer, insulation, and a protective top layer.
There are several types of flat roofs, including:
Built-Up Roof (BUR): This type of flat roof is made of multiple layers of asphalt or tar and is topped with a layer of gravel or rock.
Modified Bitumen Roof: This type of flat roof is made of a reinforced, modified bitumen membrane and is applied to the roof deck.
Single-Ply Membrane Roof: This type of flat roof uses a single layer of rubber or plastic membrane, such as EPDM (ethylene propylene diene monomer), PVC (polyvinyl chloride), or TPO (thermoplastic olefin).
Spray Polyurethane Foam (SPF) Roof: This type of flat roof is made of a spray-applied foam that expands to form a seamless, monolithic layer.
Green Roof: This type of flat roof is covered with vegetation and growing medium, providing insulation and reducing runoff.
Rolled Roofing: This type of flat roof uses long sheets of asphalt-saturated material that are rolled out over the roof deck.
Flat roofs are considered to be one of the most energy-efficient roofing options available for homeowners.
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