Second Layer Of Roof Shingles

I won t speak to a haphazardly done job.

Second layer of roof shingles.

A second layer is more difficult to install properly. Before you add shingles over shingles you need to look at the existing roof to make sure. However there are good reasons it doesn t really cut down much on the amount of work. How to put on a second layer of shingles evaluate the job.

That in itself eats away at the. It is common practice to add a second layer of shingles over an existing single layer provided the roof decking is intact and the roof surface is flat. Make repairs before. This will force you to replace your roof earlier than expected.

Examine the existing roof. Roofing second layer of shingles roofing. It forces more oil to evaporate out of it and more of the materials that make it pliable and watertight. And shingles have started to separate.

I think you ve got a good life out of it. 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. 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. Before you start hefting shingles to the roof consider whether or not the project is worth doing.

Another issue is that when you add in the second layer it can add extra weight to your roof. You will get what you pay. 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.

That second layer of shingles won t last as long. That can be either architectural shingles or conventional 3 tab shingles. But check the shingle warranty from your shingle manufacturer.