Re Roofing Over Shingles

Re roofing over old shingles can save you time and money since you will not have to rip off the old roof and pay to have it hauled away.

Re roofing over shingles.

Step 1 seek professional advice contact your local government office to inquire about local codes regarding installing new shingles over old ones. When the time comes to reroof an existing asphalt shingle roof a decision must be made whether to remove the old shingles or apply new shingles directly over the existing layer. Beveled wood pieces called horsefeathers must be laid along the thick edges of the shakes to make a fairly flat surface. 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.

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. Three tab shingles are a constant thickness while architectural shingles have multiple layers that create an uneven surface. All shingle manufacturers honor the warranty whether their products are used for a reroof or a new roof. In fact the only pro to a shingle over is it s cheaper and cleaner.

If you look at the picture above you can see the difference. Roofing second layer of shingles roofing. Re roofers have tricks to lay new roof shingles over old so that the same step ups between courses are maintained but if any old shingles are cupped curled or otherwise misshapen those defects will telegraph through to the new layer. Most building codes define the options as follows.

Before you reshingle a roof read our step by step guide for adding new shingles over old ones. Although it sounds like a good idea we can assure you the cons heavily outweigh the pros. 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. This article series discusses best practices in the selection and installation of residential roofing.

This article discusses how to prepare an existing asphalt shingle roof for a roof over or for re roofing with new asphalt shingles. The process of recovering or replacing an. Asphalt shingles can be laid over cedar shakes or shingles however this is a roofing project best left to pros.