How To Use Roofing Felt

Roof felt also known as tar paper is a waterproof fiberglass product.

How to use roofing felt.

Snap a chalk line the. Align this layer with the bottom of the roof. First paper was impregnated with coal tar. Taking the time to properly prepare the sheathing will make all the difference in how quickly and easily the felt paper is installed.

We recommend using 15 30 lb. Overlay a second layer of felt 2 to 3 inches and fasten it through the overlay so it secures the top of the felt underneath. Roofing felt acts as a waterproof barrier between the sheathing and the roofing material shingles etc. Today glass fiber or polyester fabric may be used instead of paper.

It is necessary to apply the roofing felt tar paper to a clean dry surface immediately after the sheathing is completed to protect it from the weather. Also known as tar paper roofing felt originated in finland in the 1870 s as a waterproofing underlayment for roofs. Before applying roofing you ll need to cover the sheathing with roofing felt also often called tar paper most local codes call for using 30 pound felt. Installing the roofing felt does take care but can go very quickly.

Roofing felt that provides the best shielding and allows the roofer to walk on it without ripping it is the option roofers most often choose. These thick layers of roofing felt are installed by heating the back of the felt with a butane torch and then carefully applying it to the roof. Weight matters asphalt saturated heavy duty roofing. It is used for temporary roofing for weatherproofing and as an underlayment under shingles or other permanent roofing materials.

Later asphalt was used in the manufacture of roofing felt.