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Questions and Answers
What are felts made of and what purpose do they serve in concrete?
Felts are made of glass, organic, or polyester fibers and serve the purpose of reinforcing steel in concrete.
Why are felts necessary in roofing material?
Felts are necessary as tensile reinforcement to resist the pulling forces in the roofing material.
What is the purpose of felts in a built-up roof?
To serve as tensile reinforcement and resist pulling forces in the roofing material
Name three elements that make up a built-up roof.
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What role does bitumen play in a built-up roof?
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What do surfacing materials protect the membrane from?
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What are the possible surfacing materials used in a built-up roof?
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How do layer fashion installation of felts benefit the roofing system?
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True or false: Built-up roofs are made up of felt, bitumen, and surfacing materials?
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True or false: Felts serve as tensile reinforcement in the roofing material?
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True or false: Bitumen in a built-up roof acts as a waterproofing material?
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True or false: Smooth gravel and slag are examples of surfacing materials in a built-up roof?
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True or false: Surfacing materials protect the membrane from chemical damage?
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