Roofing Over Old Shingles

Install a layer of roofing felt over the roof before you begin installing the new shingles.

Roofing over old shingles.

In fact the only pro to a shingle over is it s cheaper and cleaner. Step 3 cover the old shingles. 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. Beveled wood pieces called horsefeathers must be laid along the thick edges of the shakes to make a fairly flat surface.

Although it sounds like a good idea we can assure you the cons heavily outweigh the pros. Roofing second layer of shingles roofing. Adding new roofing over old sometimes called a re roof is possible only with asphalt shingles also called composition shingles. Although many metal roof systems can be applied over an existing roof layovers are more commonly done with asphalt shingles.

Damaged shingles should be removed to check the decking for problems. All shingle manufacturers honor the warranty whether their products are used for a reroof or a new 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. 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.

Damaged decking will need to be repaired before you can install any new shingles. The felt should be secured every six inches with nails or staples. Asphalt shingles can be laid over cedar shakes or shingles however this is a roofing project best left to pros. Choose a shingle style with the same dimensions as those on your.

How to shingle over existing shingles and how to shingle a roof how to install roof shingles shingle layout lines h.