How To Install Roll Roofing Over Shingles
After the eave drip is in place it is time to lay the roll roofing.
How to install roll roofing over shingles. Use a starter strip or cut pieces for a starter course. Install a drip edge around the perimeter of the roof. As with the felt paper it is very important to properly align the roll roofing. Nail only its top edge the part that is bare of mineral coating.
After it is unrolled and spread into place over the roof it must be nailed down. Position and roll out the roofing carefully because it is not easy to reposition then press it into the cement. It needs to be nailed down with each nail spaced roughly 6 inches apart. This aluminum flashing protects the edges of the roof sheathing.
Attach with nails along the top edge of the strip. Snap a chalk line as a guide for the first layer roofing. Prepare a valley between joined roofs by cutting a strip that is 18 inches wide and covers the entire length of the. Use a trowel to spread roofing cement over half or more of the strips.
Install roll roofing measure 35 inches up from the eaves at several intervals along the roof and mark them. Then set the first course in the cement so it overhangs by about 1 4 inch.