Roof Shingles Over Roof Shingles

In this video we provide details on how to install roof shingles over existing shingles.

Roof shingles over roof shingles. Three tab shingles are a constant thickness while architectural shingles have multiple layers that create an uneven surface. However you ll want to check with your local building department before you make any decisions. Beveled wood pieces called horsefeathers must be laid along the thick edges of the shakes to make a fairly flat surface. Installing a new roof over shingles takes less time than tearing off the old roof.

Although many metal roof systems can be applied over an existing roof layovers are more commonly done with asphalt shingles. Looks just as good and lasts as long. Although it sounds like a good idea we can assure you the cons heavily outweigh the pros. Manufacturers will still.

March 11 2020 by safe harbor roofing reroofing is the practice that involves installing a new roof over an existing one. Has the same manufacturer s warranty. If you look at the picture above you can see the difference. Choose a shingle style with the same dimensions as those on your.

Installing new roof shingles over old effectively doubles the weight of the. Building officials in some areas will only allow a re roof over one layer of shingles while officials in other places may allow you to place the roof over two layers of shingles. Before you reshingle a roof read our step by step guide for adding new shingles over old ones. Chances are your roof structure was designed for a dead load of one layer of shingles plus extra for snow and a safety margin.

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. We discuss the nesting method which helps minimize an uneven appear. 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. Asphalt shingles can be laid over cedar shakes or shingles however this is a roofing project best left to pros.

Good quality composite shingles can weigh 350 to 450 pounds per square 100 square feet of roofing installed. Yes you can install a metal roof over shingles.