Should You Add a Second Layer?
March 31, 2023
Results of a Second Layer
It is generally not recommended to install two layers of roofing shingles on a roof. There are a few reasons for this:
See picture above of the plywood that was under a 2 layer roof less than 10 years old.
- Weight: Two layers of shingles will add extra weight to your roof. This can put stress on your roof's structure and may lead to damage or even collapse over time.
- Durability: Adding a second layer of shingles can reduce the lifespan of your roof. The bottom layer can trap heat and moisture, causing the shingles to degrade faster.
- Appearance: Two layers of shingles can make your roof look uneven and unattractive.
- Warranty: Most roofing manufacturers will not warranty a roof that has two layers of shingles installed.
See picture above of the plywood that was under a 2 layer roof less than 10 years old.
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Inspecting Your Roof Can Make A Difference
Your local roofer is the person to call at the first sign of trouble, whether you need a repair or replacement. Continue reading for more!
