Install Roofing Shingles Over Existing

Damaged decking will need to be repaired before you can install any new shingles.

Install roofing shingles over existing.

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. Hope you like it. Step 3 cover the old shingles. Install a layer of roofing felt over the roof before you begin installing the new shingles.

Looks just as good and lasts as long. Layout fabricate overlap and secure asphalt shingles per manufacturer instructions. Installing asphalt shingles over an existing shingle roof it s not ideal to install new shingles without removing the old ones but follow this pro advice if you do. Use a starter strip or cut pieces for a starter course.

Work from left to right or in a methodical way. Install roofing paper membrane. As long as it s done right and under the right conditions installing new shingles over old ones can last as long and look just as good as a complete re roof. How to install a roof over an existing roof determine the feasibility.

Installing a new roof over shingles takes less time than tearing off the old roof. Manufacturers will still warranty the roof for the same amount of time as a re roof as long as it s done by a qualified installer. Inspect the condition of your current roof. Install drip edge eave trim and valley flashing.

Installing new roof shingles over old effectively doubles the weight of the roofing so you have to make sure your roof structure can handle the extra load. Here is a video on how we lay a second layer of asphalt shingles over existing asphalt shingles. Although placing new roofing over old may be allowed by some codes roofovers tend to be inferior and won t last as long as a roof installed over stripped sheathing. Damaged shingles should be removed to check the decking for problems.

The first row of shingles should overhang the drip edge of the roof. Each shingle will require around 4 nails underneath the tar line and about half an inch under where the next shingle will overlap. The felt should be secured every six inches with nails or staples. Basic labor to install asphalt shingle roof with favorable site conditions.

That s also why building codes commonly limit re roofing to no more than two layers. Attach with nails along the top edge of the strip. Do both sides first and then install ridge cap shingles over the top. The roof should be in sound.

Has the same manufacturer s warranty. Before you begin installing the new shingles be sure to inspect the roof for any damage. Multiple layers of shingles can make it difficult or impossible for the nails to penetrate.