Felt Overlap For Roofs

Continue rolling new felt rows until you are close to the roof s peak.

Felt overlap for roofs.

Let it stand for about 30 minutes and then using galvanized nails and your hammer nail down the first layer. 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. Roofing felt or tar paper is infused with a petroleum based solution to provide an additional layer of roof protection under shingles. The overlapping felt creates a secondary barrier for moisture and wicks water away from the shingles above and the sheathing below.

Laying the felt the roofing felt should be applied in layers that overlap. Roofing felt is required to overlap 2 inches over the lower felt course. Hip roofs do not have gable ends but instead they feature sides that all slope downward and must be shingled. Roll the felt so that it overhangs the edge by 2 inches.

Therefore a 2 inch overlap provides redundancy at the edges where the barrier is weakest. As you work the paper can be tacked down in the center so it won t blow away. 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. 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. Work up the roof to the peak and fold felt over the top overlapping at least 3 inches and fasten it on both sides. 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. Wrap felt over hips.