Roofing Cement Before Applying Felt Paper

Our opinion is that on new asphalt shingle tile fiber cement slate and many wood roofs most roofing contractors apply an underlayment membrane of roofing felt tar paper or fiber reinforced roofing felt.

Roofing cement before applying felt paper.

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. Cover the edges of the roof with strips of felt before laying out the final layer. You will follow the same process as in step 2 for the last layer. May 30 2018 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.

Felt labeled astm 15 meets specific standards and is the norm in many areas. Place the second row of roofing so the top edge aligns with the chalk line and the bottom edge covers the. You will need 1 10 gallon of lap not mastic cement for every roll and 2 pounds of roofing nails for every square. You can cover the surface of the felt with gravel for added strength.

Some roofers prefer to attach felt underlayment with 1 inch roofing nails or special nails with plastic washers but most codes allow staples which are easier to drive. Hold the gun at a 45 degree angle with the nozzle pointed downwards. An underlayment of felt roofing is optional. If additional coats are needed wait 12 hours before applying another coat.

The roofing should overhang the eaves by inch except where you install drip edge flashing on top of the roofing along the rake edge. Smooth a thin surface coat of no more than 1 8 inch thickness over the patch. Pull the trigger of the gun and move the nozzle around the circumference of each nail. Taking the time to properly prepare the sheathing will make all the difference in how quickly and easily the felt paper is installed.

Cover all nail heads with roofing mastic for long term roofing. Installing the roofing felt does take care but can go very quickly. Apply another layer of adhesive to the top for maximum waterproofing. It s important that use the building paper that is recommended for your area.

A special underlayment may be recommended by the manufacturers of specific roofing product and hybrid products. Having a layer of roof felt will block the resin preventing it from staining or compromising your roof shingles. When you use certain types of wood to construct your deck there is sometimes a risk the wood will leach small amounts of resin over time as it ages. Felt or building paper must be applied to walls properly to be effective.

Many builders use standard 15 pound roofing felt.