Re Roofing A House Over Existing Shingles

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

Re roofing a house over existing shingles.

Why installing new shingles over old shingles can be good. You can t do it with wood or slate for example and you should never mix materials such as laying asphalt shingles over cedar shakes. 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 before we get started one thing must be clear.

If your roof is in good shape but has some damage to one side from a downed tree or has lost shingles in a wind storm an overlay is worth considering. Doing it now will make it easier to keep the reroofing job clean. Remove the ridge caps. Having said that it will be nearly impossible to get a good looking quality installation.

Remove air vents and pipe flashings by prying out or unscrewing the fasteners holding the fixture. Watch for damaged or un sound roof decking. Many arizona homeowners with shingle roofs do decide to roof over their existing shingles because. If a shingle is.

Nailing new shingles over existing ones is less expensive and faster requiring less labor but it also means you lose the chance to assess the sheathing for signs of water damage. If the job is done correctly with the new layer of shingles laid flat over the existing shingles the old roof cushions the new one and serves as a secondary barrier should wind or water ever break through the new shingles. Prep work for re roofing over asphalt shingles inspect the condition of the existing roof and roof deck for numer of roof layers soundness of roof decking smoothness. Because there is no tear off reroofing can go much faster and be much less expensive than a complete roof replacement.

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

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. How to do it remove caps. The quick answer is yes you can re roof architectural shingles over existing architectural shingles however you must check with the shingle manufacturer as well. Use a flat pry bar.

Let s start with the good. All shingle manufacturers honor the warranty whether their products are used for a reroof or a new roof. When roofing over your existing shingles can be a good idea.