Roofing Tar Paper Overlap

Before applying roofing you ll need to cover the sheathing with roofing felt also often called tar paper most local codes call for using 30 pound felt.

Roofing tar paper overlap.

Make at least three layers. This will help give you a moisture barrier on the roof. Install all subsequent courses with the same overlap until the top edge of the paper is within 6 inches of the roof s peak. Roof felt also known as tar paper is a waterproof fiberglass product.

This overhang will ensure water will not enter underneath the paper getting trapped on top of the wood roof planks. Roll the roof paper up and over the peak. The overlapping felt creates a secondary barrier for moisture and wicks water away from the shingles above and the sheathing below. As long as the wood on your roof is in good condition you can go ahead and put tar paper down.

Roofing felt is required to overlap 2 inches over the lower felt course. Once the tar is applied tar paper can be carefully placed on top of the hot tar using a mop to sink the paper into the asphalt. Overlapping the tar paper layers to create a seal. Even if there s older tar paper in place you should simply rip it off and replace it.

Position the next course of tar paper farther up the roof so that its lower edge overlaps the upper edge of the paper in the first course by 1 foot. Therefore a 2 inch overlap provides redundancy at the edges where the barrier is weakest. Some roofers prefer to attach felt underlayment with 1 inch roofing nails or special nails with plastic washers but most codes allow staples which are easier to drive. Step 6 overlap next roll.

Secure the outside edges with plastic capped roofing nails at 12 inch intervals. 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. Experienced professionals never allow the hot tar to clump up or build up in any area. Step 4 over the peak.

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. It is used for temporary roofing for weatherproofing and as an underlayment under shingles or other permanent roofing materials. Tack it firmly in place. Make sure the rolls overlap by at least four inches and staple them into place on the wood.

Continue overlapping strips up each side of the roof. Climb onto the roof and lay a second strip of tar paper above the first strip overlapping it by about 5 inches. As you work the paper can be tacked down in the center so it won t blow away.