Roof Shingles Over Roof Shingles

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.

Roof shingles over roof shingles.

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. Should old shingles be removed before new installation. If you look at the picture above you can see the difference. However you ll want to check with your local building department before you make any decisions.

In fact the only pro to a shingle over is it s cheaper and cleaner. Choose a shingle style with the same dimensions as those on your. Manufacturers will still. March 11 2020 by safe harbor roofing reroofing is the practice that involves installing a new roof over an existing one.

Three tab shingles are a constant thickness while architectural shingles have multiple layers that create an uneven surface. Beveled wood pieces called horsefeathers must be laid along the thick edges of the shakes to make a fairly flat surface. Good quality composite shingles can weigh 350 to 450 pounds per square 100 square feet of roofing installed. Before you reshingle a roof read our step by step guide for adding new shingles over old ones.

Yes you can install a metal roof over shingles. Chances are your roof structure was designed for a dead load of one layer of shingles plus extra for snow and a safety margin. Installing a new roof over shingles takes less time than tearing off the old roof. 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.

Installing new roof shingles over old effectively doubles the weight of the. Looks just as good and lasts as long. Although many metal roof systems can be applied over an existing roof layovers are more commonly done with asphalt shingles. In this video we provide details on how to install roof shingles over existing shingles.

Although it sounds like a good idea we can assure you the cons heavily outweigh the pros. Has the same manufacturer s warranty.