Felt Overlap For Roofs

Laying the felt the roofing felt should be applied in layers that overlap.

Felt overlap for roofs.

The overlapping felt creates a secondary barrier for moisture and wicks water away from the shingles above and the sheathing below. Therefore a 2 inch overlap provides redundancy at the edges where the barrier is weakest. Roofing felt is required to overlap 2 inches over the lower felt course. Roll the felt so that it overhangs the edge by 2 inches.

As you work the paper can be tacked down in the center so it won t blow away. Roofing felt or tar paper is infused with a petroleum based solution to provide an additional layer of roof protection under shingles. 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. Work up the roof to the peak and fold felt over the top overlapping at least 3 inches and fasten it on both sides.

Roll your felt out on the roof and cut it to fit with a utility knife. Let it stand for about 30 minutes and then using galvanized nails and your hammer nail down the first layer. 15 pound roofing felt. 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.

Afterward apply the felt in the same manner on the opposite side. Although tar paper has traditionally been the standard undercoating for shingles as of 2010 synthetics are becoming more popular as an underlayment. Do the other side of the roof the same way also with an overlap at the peak. Continue rolling new felt rows until you are close to the roof s peak.