The answer is yes you can lay new roof shingles over old ones.
Can you put new shingles over old ones.
Then we ll look a lot more reasons why you might not want to do this.
Your new shingles will likely not last as long as promised.
But you must take care to install shingles correctly so they lie flat.
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.
If conditions are right new shingles laid over old shingles can be just as attractive and durable as shingles laid on bare sheathing.
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.
You won t need to pay for removal and disposal of your old shingles because they re not going anywhere and the lower number of man hours keeps cost way down.
Is it okay to put the new shingles right over the old ones.
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.
But before we get started one thing must be clear.
If you re not sure whether needs replaced it s always best to consult with a roofing expert instead of just winging it.
In the right situation putting new shingles over old ones saves money and helps the environment.
You can save a lot of money.
Tear offs increase labor costs and they generate waste that typically requires transportation to a landfill.
Installation is easier than for a tear off job because you can use the existing shingles as guides for laying the new ones.
It s not ideal to install new shingles without removing the old ones but follow this pro advice if you do.
You want to be sure that you will be installing the shingles over only one other layer though.
The basic rules know this.
Placing old shingles over top of the new ones is only possible with asphalt shingles which are also known as composition shingles.
Has the same manufacturer s warranty.
Although it is often necessary to remove old shingles it s great when you can avoid the added expense of a tear off.
The third layer of shingles will be too heavy to be supported.
Putting new shingles over the old ones is possible however there are also times when it just won t work.
The short answer is yes you can lay new roof shingles over top of the old ones but there are other reasons to take into consideration.
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.
If you need to redo your roof you might be tempted to save some money by having another layer installed over the existing shingles.