Felt Overlap For Roofs

Roofing felt is required to overlap 2 inches over the lower felt course.

Felt overlap for roofs. Roll the felt so that it overhangs the edge by 2 inches. Although tar paper has traditionally been the standard undercoating for shingles as of 2010 synthetics are becoming more popular as an underlayment. Therefore a 2 inch overlap provides redundancy at the edges where the barrier is weakest. Afterward apply the felt in the same manner on the opposite side.

Wrap felt over hips. Let it stand for about 30 minutes and then using galvanized nails and your hammer nail down the first layer. Do the other side of the roof the same way also with an overlap at the peak. Roll your felt out on the roof and cut it to fit with a utility knife.

As you work the paper can be tacked down in the center so it won t blow away. 15 pound roofing felt. Start at the bottom of the roofline and work up so any water that gets through the roofing material will shed down the tar paper and will not go under it. Continue rolling new felt rows until you are close to the roof s peak.

Work up the roof to the peak and fold felt over the top overlapping at least 3 inches and fasten it on both sides. The overlapping felt creates a secondary barrier for moisture and wicks water away from the shingles above and the sheathing below. A hip roof may be virtually square sloping from one main roof point downward on four equal sides or it may have an extended roof ridge and additional hips designed by the architect. Once you get close to the top add another layer of felt so that you overlap the ridge of your roof by about 1 foot 0 30 m.