Putting A New Roof Over An Old One

The answer is yes you can lay new roof shingles over old ones.

Putting a new roof over an old one.

Check your local ordinances to see whether this is even a possibility before moving forward with the project. Roofing over your existing roof is not always possible. A properly installed layover roof can look and function as well. By adding shingles on top of the old roof there is no opportunity to inspect the roof deck to ensure that the current wood is not wearing out.

You need to tear off the roof and install a new one. But if the current roof is curling this isn t possible. With a traditional roof replacement we completely tear off your old roof and install a shiny new one in its place. A roof deck is an underlayment that shingles are laid on top of.

Now that we ve taken care of the primary question at hand we ll consider a couple of reasons why you might want to do this. Unfortunately it s not an option for everyone. When a home receives this classification it is illegal to install a new asphalt roof over an existing one. Sounds simple enough right.

If a shingle is torn or cracked glue the broken piece back in place using roofing cement. Current shingles are curling or in bad shape the new shingle roof should lay flat on your old one. Installing a new roof over an existing one also called a layover or nailover is often possible although not always the best option. Then we ll look a lot more reasons why you might not want to do this.

If the broken piece is lost cut a new piece to fit the existing shingle. When you recover your old roof stays and the new roof gets installed on top.