Re Roofing Over Existing Asphalt Shingles

Asphalt shingles can be laid over cedar shakes or shingles however this is a roofing project best left to pros.

Re roofing over existing asphalt shingles.

Before you reshingle a roof read our step by step guide for adding new shingles over old ones. You can save. Let s start with the good. Two layers is the maximum in most areas but some building codes allow only one.

Local codes might not allow re roofing. When you should tear off your roof and start from scratch instead. Choose a shingle style with the same dimensions as those on your. 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.

Re roofing may affect the warranty on the new shingles. Why installing new shingles over old shingles can be 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.

The process of recovering or replacing an. Be sure to check with the shingle manufacturer regarding all warranty issues and installation requirements before re roofing. This article series discusses best practices in the selection and installation of residential roofing. Asphalt roof shingle re roofing advice.

We also discuss proper asphalt shingle roof preparation for a roofover job. 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. Many arizona homeowners with shingle roofs do decide to roof over their existing shingles because.

Although many metal roof systems can be applied over an existing roof layovers are more commonly done with asphalt shingles. Most building codes define the options as follows.