Second Layer Of Roof Shingles

And shingles have started to separate.

Second layer of roof shingles.

I won t speak to a haphazardly done job. Examine the existing roof. How to put on a second layer of shingles evaluate the job. Make repairs before.

Roofing second layer of shingles roofing. Another issue is that when you add in the second layer it can add extra weight to your roof. Still you ve got no less than 17 years from it already. That second layer of shingles won t last as long.

Before you add shingles over shingles you need to look at the existing roof to make sure. I don t know if a precise formula like that exists but the second layer does have less firm foundation than the first and it would be logical to expect shorter life span. I think you ve got a good life out of it. That can be either architectural shingles or conventional 3 tab shingles.

It forces more oil to evaporate out of it and more of the materials that make it pliable and watertight. Before you start hefting shingles to the roof consider whether or not the project is worth doing. But check the shingle warranty from your shingle manufacturer. A second layer is more difficult to install properly.

That in itself eats away at the. You will get what you pay. This will force you to replace your roof earlier than expected. However there are good reasons it doesn t really cut down much on the amount of work.

In fact the extra layer can reduce your roof s lifespan by up to 40. The second layer of shingles will trap heat which can result in the decomposition of both roof layers. Because the first layer holds a lot of heat and that can over the long haul wear out the second layer because that heat is the enemy of the asphalt shingle.