Will Roof Shingle Warranty Be Void If A Second Layer

This will force you to replace your roof earlier than expected.

Will roof shingle warranty be void if a second layer.

You could be adding weight to your roof with a second layer that your house cannot handle. Having an old layer of roof shingles under your new layer accelerates that process as the original layer holds a lot of heat. Re roofing may affect the warranty on the new shingles. 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.

Asphalt roof shingles remain waterproof until they dry out. That in itself eats away at the savings. This synthetic layer which replaces felt paper covers the entire roof deck and is the second line of defense against leaks after the shingles. Asphalt shingles can be laid over cedar shakes or shingles however this is a roofing project best left to pros.

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. 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. Be sure to check with the shingle manufacturer regarding all warranty issues and installation requirements before re roofing.

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. Adding this membrane isn t an option with a re roof and the extra layer of shingles offers little protection against ice dams. Most people want to add another layer to their existing roof to save money. That second layer of shingles won t last as long.

Manufacturers believe that layering the roofing diminishes the overall performance of the roof. There are a couple reasons for this. You are correct that second layers typically don t last as long as single layers. 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.

A second layer of shingles will expend heat more slowly which will shorten the shingle lifespan. It can also cause the new shingles to stick to the old shingles causing bulges. In the event you experience a problem with your gaf products caused by a manufacturing defect this warranty is a great start. Beveled wood pieces called horsefeathers must be laid along the thick edges of the shakes to make a fairly flat surface.