Roof Shingles Over Roof Shingles

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

Roof shingles over roof shingles.

Although many metal roof systems can be applied over an existing roof layovers are more commonly done with asphalt shingles. Good quality composite shingles can weigh 350 to 450 pounds per square 100 square feet of roofing installed. Asphalt shingles can be laid over cedar shakes or shingles however this is a roofing project best left to pros. Looks just as good and lasts as long.

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. Should old shingles be removed before new installation. We discuss the nesting method which helps minimize an uneven appear.

Yes you can install a metal roof over shingles. 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. Although it sounds like a good idea we can assure you the cons heavily outweigh the pros. Chances are your roof structure was designed for a dead load of one layer of shingles plus extra for snow and a safety margin.

March 11 2020 by safe harbor roofing reroofing is the practice that involves installing a new roof over an existing one. Installing a new roof over shingles takes less time than tearing off the old 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. Beveled wood pieces called horsefeathers must be laid along the thick edges of the shakes to make a fairly flat surface.

Choose a shingle style with the same dimensions as those on your. Manufacturers will still. However you ll want to check with your local building department before you make any decisions. Before you reshingle a roof read our step by step guide for adding new shingles over old ones.

Has the same manufacturer s warranty. In fact the only pro to a shingle over is it s cheaper and cleaner.