How To Install Shingles Over Existing Roof

Attach with nails along the top edge of the strip.

How to install shingles over existing roof.

Current shingles are curling or in bad shape the new shingle roof should lay flat on your old one. A benefit to doing it this way is that you can see if there is any rotten plywood that needs to be replaced before installing the new roof. Building officials in some areas will only allow a re roof over one layer of shingles while officials in other places may allow you to place the roof over two layers of shingles. So if there are already two layers the choice is made for you.

Step 4 prepare for the shingle installation. The felt should be secured every six inches with nails or staples. Do both sides first and then install ridge cap shingles over the top. You may want to wear work gloves to avoid injuring your hand or developing blisters.

Continue installing the rest of the shingles by butting each new row snugly against the bottom of the existing row of shingles immediately above and nailing into place. If the job is done correctly with the new layer of shingles laid flat over the existing shingles the old roof cushions the new one and serves as a secondary barrier should wind or water ever break through the new shingles. But if the current roof is curling this isn t possible. The first row of shingles should overhang the drip edge of the roof.

You need to tear off the roof and install a new one. Here is a video on how we lay a second layer of asphalt shingles over existing asphalt shingles. There are already two layers of shingles on your roof most building codes only allow two layers of any type of roofing on your home. Each shingle will require around 4 nails underneath the tar line and about half an inch under where the next shingle will overlap.

Yes you can install a metal roof over shingles. Roofing second layer of shingles roofing. Around an inch should do. This will help keep any moisture from getting under the felt.

The layers of felt should be overlapped by 1 inch as you work toward the roof ridge. 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. Work from left to right or in a methodical way. Install a layer of roofing felt over the roof before you begin installing the new shingles.

How to shingle over existing shingles and how to shingle a roof how to install roof shingles shingle layout lines h. Use a starter strip or cut pieces for a starter course. Hope you like it.