Rolling Roof Overlap Inches

Therefore use a 2 inch overlap for roof felt.

Rolling roof overlap inches.

Once the first row is done add approximately two inches of cement to the top of the first row to secure the second row of roofing. Selvage edge roofing is installed the same way as full width roll roofing except that each course overlaps the previous course 19 inches instead of 4. The additional overlap may only create problems when installing the shingles and felt over the roof structure. Measure and mark 35 inches from the bottom.

Use a trowel to spread roofing cement over half or more of the strips. Nail it in place with roofing nails spaced 6 inches apart and placed 1 inch from the edge. 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. 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. Position and roll out the roofing carefully because it is not easy to reposition then press it into the cement. Then set the first course in the cement so it overhangs by about 1 4 inch.

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. Roll out the first sheet and ensure that it lies flat and even. This technique will also work with full width rolls if you cannot find selvage edge roll roofing in your local store.