What Is Roofing Felt?

what is roofing felt

Despite the name, roofing felt is not exactly a piece of cloth. It is made of synthetic materials and is often used together with tar paper. When used in roofing, this material is often exposed to the elements and can easily deteriorate. It should therefore be repaired as soon as possible to prevent excessive warping or rot. Here are some tips to help you install roofing felt properly. Read on to learn more. Listed below are some of the most common uses of roofing felt.

Roofing felt serves as a protective underlayment for the roof deck. It is made from fiberglass or polyester and is laid over the roof membrane. Once this layer is in place, waterproof bituminous covering is applied to seal it. Besides being a good water-repellent, roofing felt is also a good option for homeowners as it allows the roofer to walk on it without worrying about tearing it. It also makes the roof decking smoother and more uniform.

To install a piece of roofing felt, begin at the bottom and work your way up. Start with the bottom and the eaves, then unfold several feet of felt and nail it in place. Remember to overlap several sections of felt, since you don’t want to have to walk on unnailed sections. Once you’ve completed all the sections, you can begin installing the shingles. Be careful when you’re installing the shingles, as any wrinkles or gaps can compromise the ability of the material to protect the roof deck.

To measure the size of the felt needed, multiply the roof area by 1.2 and the length of each course. Add up these two measurements to get the approximate area of each roll of roofing felt. In general, a three-inch overlap between the two layers of felt will protect the roof deck from seepage, wind-driven precipitation, and ice-dam back-up. To determine the amount of felt required, divide the square footage by the slope of the roof. A slope of four-twelve and above requires a minimum of two inches of overlap. However, greater overlap will interfere with fastening the upper courses.

Roofing felt provides extra strength to shingles. It prevents shingles from blowing off during strong winds. Unlike synthetic underlayment, it offers lowered moisture permeability. During a hurricane or a wind-driven rain, roofing felt prevents moisture from trapping under the shingles and causing mold and rot. As such, felt is an essential component of a roof. The best way to install roofing felt is to consult a professional in your area.

Felt provides an additional layer of protection to the roof deck. It also acts as a buffer between the final roofing material and the decking. When shingles or other roofing materials fall off during a storm, the felt will step in to protect the wood sheathing. It also disguises uneven areas of the roof and offers fire protection. So, before you start shingling, remember to install roofing felt on your home. So, if you’re wondering what is roofing felt, read on!