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Home » Our Blog » Roofing » Problems You May Face When Nailing a New Roof Over the Old One

Problems You May Face When Nailing a New Roof Over the Old One

December 27, 2019 by Jesse Curry

Trying to cut corners when it comes to roof replacement is a bad idea. There is no shortcut when it comes to successful roofing installation. You cannot rely on substandard materials and the service of unqualified roofers because, at the end of the day, you’re the one who’s at risk.

The roofing system is your primary defense against the elements. Therefore, it is never advisable to install a new roofing system over the old one. 

1. It May Violate Manufacturer Instructions

Two layers of shingles are the limit. However, damaged shingles cannot be layered. When the shingles are already brittle, curled or granulated, they should be replaced immediately and not layered with a new one. One, because it can damage other parts of the roof. Two, it violates the manufacturer’s instructions. 

2. It Voids the Material Warranties 

There’s a reason why roofers are against the practice of covering old roofing materials with new ones: they don’t want to void the warranty for the materials they will install. Before installing new materials, roofing contractors are required to inspect the condition of the whole roofing system. And, when they find damage that can affect the new materials, they are obligated to remove and replace it. 

3. It Adds More Weight to the Roof

The more materials installed, the heavier the roof gets. And, that is not good for your roofing system. Over time, the extra weight can badly damage the materials inside due to pressure. Multiple layers of shingles can also absorb more heat than those installed directly in the sheathing.  

Get Expert Help From Us! 

At Roofing by Curry, our top priority is building lasting relationships based on friendship and trust. We are one of the leading local roofers that provide roof repair, installation and replacement services. Give us a call at (941) 921-9111, or fill out our contact form for a consultation.

Filed Under: Roofing Tagged With: Roof replacement, Roofers, roofing warranties

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