Second Layer Of Roof Shingles

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.

Second layer of roof shingles.

Examine the existing roof. That second layer of shingles won t last as long. And shingles have started to separate. Make repairs before.

Another issue is that when you add in the second layer it can add extra weight to your roof. This will force you to replace your roof earlier than expected. That can be either architectural shingles or conventional 3 tab shingles. But check the shingle warranty from your shingle manufacturer.

You will get what you pay. It forces more oil to evaporate out of it and more of the materials that make it pliable and watertight. 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. 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. Before you start hefting shingles to the roof consider whether or not the project is worth doing.

A second layer is more difficult to install properly. How to put on a second layer of shingles evaluate the job. How to shingle over existing shingles and how to shingle a roof how to install roof shingles shingle layout lines h. I think you ve got a good life out of it.

That in itself eats away at the. Roofing second layer of shingles roofing. 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.