Roof Felt Paper Overlap

Tar paper also called roofing felt is used under shingles.

Roof felt paper overlap.

Also called roof felt or builder s felt overlapped tar paper creates a water barrier that is your home s last line of defense against the elements if your shingles are damaged by wind hail or. Purchase enough felt to cover your roof s area. Strips should always lay flat. The drip edge should extend at least 2 inches on the roof.

Roofing felt is required to overlap 2 inches over the lower felt course. Video of the day. Pay special attention to movements on top of any roof. Although tar paper has traditionally been the standard undercoating for shingles as of 2010 synthetics are becoming more popular as an underlayment.

Uneven strips and wrinkles can allow dust moisture and mold to develop. Never mount the felt paper on wet sheathing. The vertical leg of the drip edge should be at least 1 5 inches wide and extend at least 0 25 inches below the sheathing. Is roofing felt required.

Check the requirements for the roofing material that will go over the felt. Roofing felt or tar paper is infused with a petroleum based solution to provide an additional layer of roof protection under shingles. Felt details for various roof slopes amp. Convert the area from inches to feet prior to purchasing your felt.

Roofing underlayment roofing felt requirements. This article series discusses roofing felt specifically addressing the roofing code or roofing manufacturer s requirements for use of an underlayment such as roofing felt tarpaper or other underlayment products beneath asphalt shingles and other. Therefore a 2 inch overlap provides redundancy at the edges where the barrier is weakest. Remember to always overlap roof paper at valley ridges and hips by six inches.

Mold and mildew will result and you could wind up having to rip off the roof and install a new one. In most cases this will leave 400 square feet 37 m 2 of net coverage per 1 roll. Adjacent pieces of drip edge should overlap at least 2 inches 51 mm. Cut a slit from the side of a paper roll to accommodate vent pipes.

Some materials require heavier felt paper. It s best to wear gloves and protective eyewear for safety purposes. The overlapping felt creates a secondary barrier for moisture and wicks water away from the shingles above and the sheathing below. Overlap the end of a roll about 4 inches with the start of a new roll and fasten both pieces to the.

Dry sheathing and felt paper also help ensure a watertight roof in severe climates. Roofing felt is a layer of tar paper installed beneath the shingles to provide a backup waterproof membrane in case of leakage. One roll of conventional 15 felt covers 432 square feet 40 1 m 2. Continue along the roof to the other end and trim the felt flush at the end with a utility knife.