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.
Reshingle roof over old shingles.
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.
Has the same manufacturer s warranty.
But you must take care to install shingles correctly so they lie flat.
Place a pitchfork flat garden shovel or shingle scraper under the shingle.
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.
That s also why building codes commonly limit re roofing to no more than two layers.
Although it sounds like a good idea we can assure you the cons heavily outweigh the pros.
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.
You want to be sure that you will be installing the shingles over only one other layer though.
If you are looking to save time installing new shingles over old shingles is a possible roof replacement solution.
Installing a new roof over shingles takes less time than tearing off the old roof.
Your existing layer of roof shingles is deteriorating and you need to get a new roof installed.
Roofing second layer of shingles roofing.
In fact the only pro to a shingle over is it s cheaper and cleaner.
How to shingle over existing shingles and how to shingle a roof how to install roof shingles shingle layout lines h.
Installation is easier than for a tear off job because you can use the existing shingles as guides for laying the new ones.
If conditions are right new shingles laid over old shingles can be just as attractive and durable as shingles laid on bare sheathing.
Looks just as good and lasts as long.
Pry the shingle from the roof.