New Roof Over Existing Shingles

Many arizona homeowners with shingle roofs do decide to roof over their existing shingles because.

New roof over existing shingles.

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. 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. Reroofing is the process of layering one set of new shingles over a set of existing shingles.

Use a flat pry bar. How to install a roof over an existing roof determine the feasibility. The layers of felt should be overlapped by 1 inch as you work toward the roof ridge. Although it sounds like a good idea we can assure you the cons heavily outweigh the pros.

Remove air vents and pipe flashings by prying out or unscrewing the fasteners holding the fixture. Old shingles can curl over time. Multiple layers of shingles can make it difficult or impossible for the nails to penetrate. Inspect the condition of your current roof.

That s also why building codes commonly limit re roofing to no more than two layers. 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. When roofing over your existing shingles can be a good idea.

Let s start with the good. How to do it remove caps. Doing it now will make it easier to keep the reroofing job clean. This will help keep any moisture from getting under the felt.

Installation is easier than for a tear off job because you can use the existing shingles as guides for laying the new ones. Yes you can install a metal roof over shingles. When you should tear off your roof and start from scratch instead. There s a lot of visible damage.

The condition of the existing roof is critical. The roof should be in sound. It can only be done once so if you already have two layers of roofing in place reroofing is not an option for you. But you must take care to install the shingles correctly so they lie flat.

Install a layer of roofing felt over the roof before you begin installing the new 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. The felt should be secured every six inches with nails or staples. If a shingle is.

However you ll want to check with your local building department before you make any decisions. 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. You need a flat surface to install a new roof over existing shingles.