Rolling Roof Overlap Inches

Although overlapping felt more than 2 inches may provide extra protection the 2 inch overlap is adequate for most applications and will provide an excellent roof.

Rolling roof overlap inches.

Use a trowel to spread roofing cement over half or more of the strips. Nail only its top edge the. This technique will also work with full width rolls if you cannot find selvage edge roll roofing in your local store. Nail it in place with roofing nails spaced 6 inches apart and placed 1 inch from the edge.

Measure and mark 35 inches from the bottom. Apply about two inches worth of cement under either side to seal the roofing down and then nail it down making sure it still stays flat and even as you go. Then set the first course in the cement so it overhangs by about 1 4 inch. Install a blue tarp on a roof how to add flashing to a chimney.

If lap sealant is used simply apply a bead of sealant on top of the underlap ridge going all the way down the length of the ridge before the overlap ridge of the next panel is placed on top. Add a second piece of full width roll roofing over the first. The additional overlap may only create problems when installing the shingles and felt over the roof structure. Position and roll out the roofing carefully because it is not easy to reposition then press it into the cement.

In other words if the height of the roof drops by 2 inches for every 12 inches in length you will need to use sealant to strengthen the overlap barrier. If you have a sloped roof cut strips of roofing 9 inches wide position them flush with the drip edges along the eave and rake and attach them by driving two rows of nails that are about 3 inches apart. Roll out the first sheet and ensure that it lies flat and even.