Roof Shingles Over Roof Shingles

Installing new roof shingles over old effectively doubles the weight of the.

Roof shingles over roof shingles.

March 11 2020 by safe harbor roofing reroofing is the practice that involves installing a new roof over an existing one. 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. Good quality composite shingles can weigh 350 to 450 pounds per square 100 square feet of roofing installed. Has the same manufacturer s warranty.

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. However you ll want to check with your local building department before you make any decisions. Manufacturers will still.

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. 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. Chances are your roof structure was designed for a dead load of one layer of shingles plus extra for snow and a safety margin. We discuss the nesting method which helps minimize an uneven appear.

In this video we provide details on how to install roof shingles over existing shingles. Three tab shingles are a constant thickness while architectural shingles have multiple layers that create an uneven surface. Looks just as good and lasts as long. Choose a shingle style with the same dimensions as those on your.

Should old shingles be removed before new installation. Although many metal roof systems can be applied over an existing roof layovers are more commonly done with asphalt shingles. Installing a new roof over shingles takes less time than tearing off the old roof. Yes you can install a metal roof over shingles.

In fact the only pro to a shingle over is it s cheaper and cleaner. Asphalt shingles can be laid over cedar shakes or shingles however this is a roofing project best left to pros.