Second Layer Of Roof Shingles

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

Second layer of roof shingles.

How to shingle over existing shingles and how to shingle a roof how to install roof shingles shingle layout lines h. Roofing second layer of shingles roofing. Before you add shingles over shingles you need to look at the existing roof to make sure. Before you start hefting shingles to the roof consider whether or not the project is worth doing.

Still you ve got no less than 17 years from it already. In fact the extra layer can reduce your roof s lifespan by up to 40. And so second layers generally don t last as long as the first layers. Make repairs before.

I think you ve got a good life out of it. 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. It forces more oil to evaporate out of it and more of the materials that make it pliable and watertight. How to put on a second layer of shingles evaluate the job.

The second layer of shingles will trap heat which can result in the decomposition of both roof layers. And shingles have started to separate. But check the shingle warranty from your shingle manufacturer. 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.

Examine the existing roof. A second layer is more difficult to install properly. I won t speak to a haphazardly done job. 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.

That second layer of shingles won t last as long. You will get what you pay. That can be either architectural shingles or conventional 3 tab shingles.