Roof Felt Paper Overlap

Convert the area from inches to feet prior to purchasing your felt.

Roof felt paper overlap.

Felt otherwise known as underpayment is required when. Adjacent pieces of drip edge should overlap at least 2 inches 51 mm. Roofing felt is required to overlap 2 inches over the lower felt course. Cut a slit from the side of a paper roll to accommodate vent pipes.

The drip edge should extend at least 2 inches on the roof. Mold and mildew will result and you could wind up having to rip off the roof and install a new one. Remember to always overlap roof paper at valley ridges and hips by six inches. Roofing underlayment roofing felt requirements.

Is roofing felt required. Tar paper also called roofing felt is used under shingles. 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.

However you must allow for overlaps on joints. Never mount the felt paper on wet sheathing. Some materials require heavier felt paper. The spacing between the nails on the drip edge should be less than 12 inches apart.

Continue along the roof to the other end and trim the felt flush at the end with a utility knife. One roll of conventional 15 felt covers 432 square feet 40 1 m 2. Overlap the end of a roll about 4 inches with the start of a new roll and fasten both pieces to the. Strips should always lay flat.

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. Roofing felt or tar paper is infused with a petroleum based solution to provide an additional layer of roof protection under shingles. Pay special attention to movements on top of any roof. Check the requirements for the roofing material that will go over the felt.

In most cases this will leave 400 square feet 37 m 2 of net coverage per 1 roll. Dry sheathing and felt paper also help ensure a watertight roof in severe climates. Purchase enough felt to cover your roof s area. Roofing felt is a layer of tar paper installed beneath the shingles to provide a backup waterproof membrane in case of leakage.

Uneven strips and wrinkles can allow dust moisture and mold to develop. Therefore a 2 inch overlap provides redundancy at the edges where the barrier is weakest. 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. Felt details for various roof slopes amp.