Will Roof Shingle Warranty Be Void If A Second Layer

Asphalt roof shingles remain waterproof until they dry out.

Will roof shingle warranty be void if a second layer.

All gaf roofing shingles and qualifying accessories the gaf products come with the great coverage provided by the gaf shingle accessory limited warranty and you don t need to do anything at all to get it. Before you reshingle a roof read our step by step guide for adding new shingles over old ones. Installing a new roof on top of your old roof will void or shorten your warranty in most cases. However this is a particularly short sighted approach once you realize that layering roofing can often void the warranty.

This is especially true if there is huge snowfall. For many reasons we don t recommend this and encourage you to be suspect of any company that wants to do it to cut costs. That second layer of shingles won t last as long. Having an old layer of roof shingles under your new layer accelerates that process as the original layer holds a lot of heat.

That in itself eats away at the savings. A second layer of shingles will expend heat more slowly which will shorten the shingle lifespan. Be sure to check with the shingle manufacturer regarding all warranty issues and installation requirements before re roofing. In the event you experience a problem with your gaf products caused by a manufacturing defect this warranty is a great start.

This will force you to replace your roof earlier than expected. You could be adding weight to your roof with a second layer that your house cannot handle. Asphalt shingles can be laid over cedar shakes or shingles however this is a roofing project best left to pros. It can also cause the new shingles to stick to the old shingles causing bulges.

Reasons why you should not add a second layer of shingles it will shorten the lifespan of your roof the second layer of shingles will trap heat which can result in the decomposition of both roof layers. Beveled wood pieces called horsefeathers must be laid along the thick edges of the shakes to make a fairly flat surface. Manufacturers believe that layering the roofing diminishes the overall performance of the roof. This synthetic layer which replaces felt paper covers the entire roof deck and is the second line of defense against leaks after the shingles.

Adding this membrane isn t an option with a re roof and the extra layer of shingles offers little protection against ice dams. Re roofing may affect the warranty on the new shingles. In most cases if not all if you install a new roof on top of your old roof it will void the warranty. 3 starter shingles a narrow row of asphalt roofing the starter strip is nailed to the perimeter of the roof with a bead of adhesive on top that grips the underside of the first course of shingles.