Shingle Over Existing Shingle Roof

Roofing second layer of shingles roofing.

Shingle over existing shingle roof.

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. 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 you should tear off your roof and start from scratch instead. When roofing over your existing shingles can be a good idea.

This is by far the most common way to install a metal roof. In fact the only pro to a shingle over is it s cheaper and cleaner. Although it sounds like a good idea we can assure you the cons heavily outweigh the pros. All shingle manufacturers honor the warranty whether their products are used for a reroof or a new roof.

This article discusses how to prepare an existing asphalt shingle roof for a roof over or for re roofing with new asphalt shingles. Beveled wood pieces called horsefeathers must be laid along the thick edges of the shakes to make a fairly flat surface. This article series discusses best practices in the selection and installation of residential roofing. Many arizona homeowners with shingle roofs do decide to roof over their existing shingles because.

Why installing new shingles over old shingles can be good. How to shingle over existing shingles and how to shingle a roof how to install roof shingles shingle layout lines h. Let s start with the good. Before you reshingle a roof read our step by step guide for adding new shingles over old ones.

It s clearly easier and cheaper to leave the old shingles in place but there s some special prep work involved with a re roof removing vents ridge caps and misshapen shingles among other things and you still have to replace or add new flashing which sometimes can be tricky over old roofing. You can save. Choose a shingle style with the same dimensions as those on your. Although many metal roof systems can be applied over an existing roof layovers are more commonly done with asphalt shingles.

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