This will help keep any moisture from getting under the felt.
New roof over existing shingles.
When roofing over your existing shingles can be a good idea.
Although it sounds like a good idea we can assure you the cons heavily outweigh the pros.
In fact the only pro to a shingle over is it s cheaper and cleaner.
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.
But you must take care to install the shingles correctly so they lie flat.
That s also why building codes commonly limit re roofing to no more than two layers.
The roof should be in sound.
You can save money because there s no dump fee for removing your old roofing and there s no need for additional felt paper over the old roof.
The felt should be secured every six inches with nails or staples.
Yes you can install a metal roof over shingles.
Multiple layers of shingles can make it difficult or impossible for the nails to penetrate.
How to do it remove caps.
There s a lot of visible damage.
The layers of felt should be overlapped by 1 inch as you work toward the roof ridge.
If a shingle is.
If conditions are right new shingles laid over old shingles can be just as attractive and durable as shingles laid on bare sheathing.
Mold rot or other significant damage needs to be taken care of with a full replacement not hidden by new materials.
How to install a roof over an existing roof determine the feasibility.
The condition of the existing roof is critical.
Let s start with the good.
However you ll want to check with your local building department before you make any decisions.
Install a layer of roofing felt over the roof before you begin installing the new shingles.
Inspect the condition of your current roof.
Why installing new shingles over old shingles can be good.
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.
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.
Because there is no tear off reroofing can go much faster and be much less expensive than a complete roof replacement.
Remove air vents and pipe flashings by prying out or unscrewing the fasteners holding the fixture.
It can only be done once so if you already have two layers of roofing in place reroofing is not an option for you.
Doing it now will make it easier to keep the reroofing job clean.
Use a flat pry bar.
You need a flat surface to install a new roof over existing shingles.
Remove the ridge caps.
Many arizona homeowners with shingle roofs do decide to roof over their existing shingles because.
Old shingles can curl over time.
