New Roof Over Existing Shingles

Use a flat pry bar.

New roof over existing shingles.

The felt should be secured every six inches with nails or staples. Installation is easier than for a tear off job because you can use the existing shingles as guides for laying the new ones. Many arizona homeowners with shingle roofs do decide to roof over their existing shingles because. How to do it remove caps.

When roofing over your existing shingles can be a good idea. If conditions are right new shingles laid over old shingles can be just as attractive and durable as shingles laid on bare sheathing. Because there is no tear off reroofing can go much faster and be much less expensive than a complete roof replacement. Although it sounds like a good idea we can assure you the cons heavily outweigh the pros.

This will help keep any moisture from getting under the felt. Doing it now will make it easier to keep the reroofing job clean. If a shingle is. In fact the only pro to a shingle over is it s cheaper and cleaner.

When you should tear off your roof and start from scratch instead. Yes you can install a metal roof over shingles. The condition of the existing roof is critical. 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 layers of felt should be overlapped by 1 inch as you work toward the roof ridge. You need a flat surface to install a new roof over existing shingles. Let s start with the 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. Remove air vents and pipe flashings by prying out or unscrewing the fasteners holding the fixture. Inspect the condition of your current roof. Reroofing is the process of layering one set of new shingles over a set of existing shingles.

There s a lot of visible damage. Remove the ridge caps. Multiple layers of shingles can make it difficult or impossible for the nails to penetrate. The roof should be in sound.

Why installing new shingles over old shingles can be good. But you must take care to install the shingles correctly so they lie flat. Mold rot or other significant damage needs to be taken care of with a full replacement not hidden by new materials. That s also why building codes commonly limit re roofing to no more than two layers.

It can only be done once so if you already have two layers of roofing in place reroofing is not an option for you. Old shingles can curl over time. However you ll want to check with your local building department before you make any decisions.