Why Is Your Roof Buckling?

If you look at your roof from the ground, can you see areas that look like they're lifting up or bubbling up? This phenomenon, where portions of the roof lift upward, is known as buckling. It is a serious concern because it can cause leaks. Here's a look at the three most common causes of buckling, and what can be done to fix them.

Cause #1: Inadequate Spacing Between Roof Sheathing

Beneath the shingles of your roof lies the roof sheathing, a layer that is typically made from plywood. When a roofer installs a new roofing sheath, it is important than a small amount of space is left between the sheets of plywood. This space allows the sheathing to expand and contract as the weather changes. If not enough space is left, the boards will lift up where they border each other as the wood expands in hot or humid weather.

If your roofing contractor discovers that the sheathing is improperly spaced, unfortunately, the only solution is to re-roof the home. Your roofing contractor can evaluate the severity of the buckling and let you know how urgently this needs to be done.

Cause #2: Excessive Moisture in the Attic

If your attic is very moist, the roof sheathing may be getting wetter than intended, and it may be simply over-swelling the spaces left between the panels. Usually, if an attic is this moist, there is a good reason. Perhaps there is a steam heating system with pipes that have been leaking in the attic, or maybe there is a leak elsewhere in the roof that has been letting water in.

If your roofing contractor tells you that excessive attic moisture is causing your buckling, he or she will likely recommend replacing the damaged area of the roof, and then eliminating the cause of the moisture so buckling does not happen again.

Cause #3: Poor Ventilation

If your attic is not well ventilated, your roof may be exposed to more heat and humidity than it can handle on hot days, once again causing the sheathing panels to over-swell the space between them and buckle.

Adding additional ventilation to a roof is generally pretty straight forward. Your roofing contractor can add new soffit vents under the eaves, or install a ridge vent where one is lacking. He or she will likely need to replace the area of the roof that is buckling, too.

Once a roof buckles, the problem does not usually go away on its own. Make sure you call your roofing contractor like Davis Roofing Co to get to the bottom of the problem before it gets worse and exposes your home to leaking water.


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