Problems With Re Roofing A House Over Existing Shingles

This article discusses how to prepare an existing asphalt shingle roof for a roof over or for re roofing with new asphalt shingles.

Problems with re roofing a house over existing shingles. Manufacturers will still. Hope you like it. Asphalt roof shingle re roofing advice. In fact the only pro to a shingle over is it s cheaper and cleaner.

Local codes might not allow re roofing. Has the same manufacturer s warranty. Here is a video on how we lay a second layer of asphalt shingles over existing asphalt shingles. Asphalt shingles can be laid over cedar shakes or shingles however this is a roofing project best left to pros.

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. Diminish the overall life of the roof. Reroofing is the process of layering one set of new shingles over a set of existing shingles. Although it sounds like a good idea we can assure you the cons heavily outweigh the pros.

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. We also discuss proper asphalt shingle roof preparation for a roofover job. Looks just as good and lasts as long. However layering roofing can.

Two layers is the maximum in most areas but some building codes allow only one. Many restrict a number of times you can layer the roofing. As long as it s done right and under the right conditions installing new shingles over old ones can last as long and look just as good as a complete re roof. Before considering layering roofing over an existing roof it s important to check your local building codes.

Because there is no tear off reroofing can go much faster and be much less expensive than a complete roof replacement. Before you reshingle a roof read our step by step guide for adding new shingles over old ones. It can only be done once so if you already have two layers of roofing in place reroofing is not an option for you. Installing a new roof over shingles takes less time than tearing off the old roof.

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. This article series discusses best practices in the selection and installation of residential roofing. Be sure to check with the shingle manufacturer regarding all warranty issues and installation requirements before re roofing. Re roofing may affect the warranty on the new shingles.

Void your shingle warranty. Beveled wood pieces called horsefeathers must be laid along the thick edges of the shakes to make a fairly flat surface.