Second Layer Of Roof Shingles

Another issue is that when you add in the second layer it can add extra weight to your roof.

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. And so second layers generally don t last as long as the first layers. Examine the existing roof. How to put on a second layer of shingles evaluate the job.

Before you start hefting shingles to the roof consider whether or not the project is worth doing. Before you add shingles over shingles you need to look at the existing roof to make sure. That second layer of shingles won t last as long. That in itself eats away at the.

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. You will get what you pay. The second layer of shingles will trap heat which can result in the decomposition of both roof layers. And shingles have started to separate.

I think you ve got a good life out of it. However there are good reasons it doesn t really cut down much on the amount of work. 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.

Roofing second layer of shingles roofing. 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. Make repairs before. 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.

But check the shingle warranty from your shingle manufacturer. This will force you to replace your roof earlier than expected. That can be either architectural shingles or conventional 3 tab shingles.