Roof Felt Paper Overlap

Is roofing felt required.

Roof felt paper overlap.

The drip edge should extend at least 2 inches on the roof. Roofing felt or tar paper is infused with a petroleum based solution to provide an additional layer of roof protection under shingles. 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. The spacing between the nails on the drip edge should be less than 12 inches apart.

Cut a slit from the side of a paper roll to accommodate vent pipes. In most cases this will leave 400 square feet 37 m 2 of net coverage per 1 roll. Strips should always lay flat. Convert the area from inches to feet prior to purchasing your felt.

Video of the day. Therefore a 2 inch overlap provides redundancy at the edges where the barrier is weakest. Felt details for various roof slopes amp. Mold and mildew will result and you could wind up having to rip off the roof and install a new one.

Uneven strips and wrinkles can allow dust moisture and mold to develop. Continue along the roof to the other end and trim the felt flush at the end with a utility knife. Check the requirements for the roofing material that will go over the felt. Roofing underlayment roofing felt requirements.

Pay special attention to movements on top of any roof. Purchase enough felt to cover your roof s area. Tar paper also called roofing felt is used under shingles. Felt otherwise known as underpayment is required when.

Roofing felt is a layer of tar paper installed beneath the shingles to provide a backup waterproof membrane in case of leakage. The overlapping felt creates a secondary barrier for moisture and wicks water away from the shingles above and the sheathing below. 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. However you must allow for overlaps on joints.

Remember to always overlap roof paper at valley ridges and hips by six inches. One roll of conventional 15 felt covers 432 square feet 40 1 m 2. Never mount the felt paper on wet sheathing. Dry sheathing and felt paper also help ensure a watertight roof in severe climates.

It s best to wear gloves and protective eyewear for safety purposes. Although tar paper has traditionally been the standard undercoating for shingles as of 2010 synthetics are becoming more popular as an underlayment. 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.