How To Install Roll Roofing Over Shingles

Install roll roofing measure 35 inches up from the eaves at several intervals along the roof and mark them.

How to install roll roofing over shingles.

This aluminum flashing protects the edges of the roof sheathing. Snap a chalk line as a guide for the first layer roofing. After it is unrolled and spread into place over the roof it must be nailed down. Attach with nails along the top edge of the strip.

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. Prepare a valley between joined roofs by cutting a strip that is 18 inches wide and covers the entire length of the. Do not use the eaves as a guide instead because they can be uneven.

Use a trowel to spread roofing cement over half or more of the strips. Rip cut the starter strip or starter pieces so that they butt up against the second course of existing shingles and are even with the front edge of the existing roofing. It needs to be nailed down with each nail spaced roughly 6 inches apart. Use a starter strip or cut pieces for a starter course.

After the eave drip is in place it is time to lay the roll roofing. Install a drip edge around the perimeter of the roof.