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What is Roofing Felt?

Roofing Felt: What is it?

Roofing felt is a type of underlayment that is often used when installing a new roof. Some jurisdictions require that a new roof be installed with some sort of roofing felt or moisture barrier. Roofing felt, typically made of compressed polyester or fiberglass material, helps protect the roof deck during the installation process. They are usually coated with asphalt to provide the material with some water resistance.

The felt also helps create a safer working environment for the roofers. In some cases, a roofing felt may also provide some additional protection from fire. If a shingle blows off during a storm, the felt may temporarily keep water from entering the home. Roofing felt usually comes in two weights, 15 or 30 lb. The 30 lb. felt is thicker, more durable, and can handle more moisture.

Synthetic Underlayments

In recent years, underlayments made of plastic and other synthetic polymers have become increasingly popular. They are strong, lightweight, and often provide superior protection from moisture. They can also withstand higher temperatures and will not be affected by UV rays.

Heads up!

Before choosing a type of underlayment, you should consult the manufacturer’s warranty on your roofing material. Using the wrong underlayment may invalidate your warranty.

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About the Author

ProMatcher Staff, ProMatcher
Orlando, FL 32803

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