Bituminous felt, sometimes simply known as roofing felt, is used as a waterproof material mainly for the roof covering. It is made up of polyester fleece or glass fiber that is combined with a bituminous material such as tar.
Use of Roofing felt bitumen:
Bitumen (asphalt or coal-tar pitch) is a mixed substance made up of organic liquids that are highly sticky, viscous, and waterproof. These systems are sometimes used to construct roofs, in the form of roofing felt or roll roofing products.
When it comes to a felt flat roof’s lifespan, the majority of guarantees will only last for ten years. If well installed and maintained, roofing felt could last longer but it will require time and money to keep it in a decent state.
Roofing felt can get wet and still maintain its integrity, as long as it is not exposed to the elements for more than a few days. It will break down in sunlight and with large amounts of ongoing moisture. … If the felt is still wet, it may rip when shingles are installed.
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