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