New Roof Over Existing Shingles

If a shingle is.

New roof over existing shingles.

Old shingles can curl over time. 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. Remove the ridge caps.

Remove air vents and pipe flashings by prying out or unscrewing the fasteners holding the fixture. Let s start with the good. There s a lot of visible damage. How to do it remove caps.

Inspect the condition of your current roof. 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. When roofing over your existing shingles can be a good idea. But you must take care to install the shingles correctly so they lie flat.

When you should tear off your roof and start from scratch instead. The layers of felt should be overlapped by 1 inch as you work toward the roof ridge. In fact the only pro to a shingle over is it s cheaper and cleaner. The felt should be secured every six inches with nails or staples.

Reroofing is the process of layering one set of new shingles over a set of existing shingles. Mold rot or other significant damage needs to be taken care of with a full replacement not hidden by new materials. Because there is no tear off reroofing can go much faster and be much less expensive than a complete roof replacement. The roof should be in sound.

Multiple layers of shingles can make it difficult or impossible for the nails to penetrate. You need a flat surface to install a new roof over existing shingles. The condition of the existing roof is critical. This will help keep any moisture from getting under the felt.

Doing it now will make it easier to keep the reroofing job clean. How to install a roof over an existing roof determine the feasibility. Install a layer of roofing felt over the roof before you begin installing the new shingles. Many arizona homeowners with shingle roofs do decide to roof over their existing shingles because.

Although it sounds like a good idea we can assure you the cons heavily outweigh the pros. Yes you can install a metal roof over shingles. It can only be done once so if you already have two layers of roofing in place reroofing is not an option for you. Use a flat pry bar.

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. That s also why building codes commonly limit re roofing to no more than two layers. However you ll want to check with your local building department before you make any decisions.