Roofing Felt Overlap Size

However you must allow for overlaps on joints.

Roofing felt overlap size.

Overlap the end of a roll about 4 inches with the start of a new roll and fasten both pieces to the. Purchase enough felt to cover your roof s area. If there is any wind at all roll out the felt only about 10 feet. Pick up the roll with both hands.

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. You can see the difference between the underlayment overlapped 19 inches on the roof to the right and overlapped 2 inches on the roof to the left. Roofing requirements roofing felt is required to overlap 2 inches over the lower felt course. One roll of conventional 15 felt covers 432 square feet 40 1 m 2.

In most cases this will leave 400 square feet 37 m 2 of net coverage per 1 roll. In steep slope roofs 4 12 and steeper the upper courses of felt underlayment should overlap lower courses by at least 2 inches. The drip edge should extend at least 2 inches on the roof. Therefore a 2 inch overlap provides redundancy at the edges where the barrier is weakest.

The spacing between the nails on the drip edge should be less than 12 inches apart. Convert the area from inches to feet prior to purchasing your felt. Adjacent pieces of drip edge should overlap at least 2 inches 51 mm. Never walk on felt that has not been nailed down.