Reshingle Roof Over Old Shingles

Roofing second layer of shingles roofing.

Reshingle roof over old shingles.

Although it sounds like a good idea we can assure you the cons heavily outweigh the pros. You want to be sure that you will be installing the shingles over only one other layer though. Your existing layer of roof shingles is deteriorating and you need to get a new roof installed. The nails in the shingle should come up with the shingle when you pry it off.

In fact the only pro to a shingle over is it s cheaper and cleaner. One question you might have is can i reroof over existing shingles the answer is it depends state regulations and the condition of your roof both play a role in determining if you need a roof replacement tear off vs cover over. But you must take care to install shingles correctly so they lie flat. If conditions are right new shingles laid over old shingles can be just as attractive and durable as shingles laid on bare sheathing.

All shingle manufacturers honor the warranty whether their products are used for a reroof or a new roof. 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. Remove all of the shingles on the roof. 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.

When contemplating a new roof many people hope to simply do a shingle over and avoid the extra cost and mess of tearing off the existing roof and starting from scratch. How to shingle over existing shingles and how to shingle a roof how to install roof shingles shingle layout lines h. That s also why building codes commonly limit re roofing to no more than two layers. 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.

Installation is easier than for a tear off job because you can use the existing shingles as guides for laying the new ones. Looks just as good and lasts as long. Has the same manufacturer s warranty. Place a pitchfork flat garden shovel or shingle scraper under the shingle.

The third layer of shingles will be too heavy to be supported.