Problems With Re Roofing A House Over Existing Shingles

Has the same manufacturer s warranty.

Problems with re roofing a house over existing shingles.

Installing a new roof over shingles takes less time than tearing off the old roof. Although it sounds like a good idea we can assure you the cons heavily outweigh the pros. Asphalt shingles can be laid over cedar shakes or shingles however this is a roofing project best left to pros. Re roofing may affect the warranty on the new shingles.

Many restrict a number of times you can layer the roofing. 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. Beveled wood pieces called horsefeathers must be laid along the thick edges of the shakes to make a fairly flat surface. It can only be done once so if you already have two layers of roofing in place reroofing is not an option for you.

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. In fact the only pro to a shingle over is it s cheaper and cleaner. Here is a video on how we lay a second layer of asphalt shingles over existing asphalt shingles. Looks just as good and lasts as long.

Manufacturers will still. Asphalt roof shingle re roofing advice. 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. Void your shingle warranty.

Diminish the overall life of the roof. Add excessive weight to the structure of your house. 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. Hope you like it.

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. Before you reshingle a roof read our step by step guide for adding new shingles over old ones. This article discusses how to prepare an existing asphalt shingle roof for a roof over or for re roofing with new asphalt shingles. Local codes might not allow re roofing.

Before considering layering roofing over an existing roof it s important to check your local building codes. 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. However layering roofing can.

All shingle manufacturers honor the warranty whether their products are used for a reroof or a new roof. Reroofing is the process of layering one set of new shingles over a set of existing shingles.