Thunderstorms are in the forecast for the next 10 days – not an uncommon occurrence for a southern spring. We often hear about the danger of storms causing leaks, but what about the wind damage that comes rolling in with the storm? Your roof is the only defense between you and Mother Nature’s elements. It is important to be aware of the damage that wind can do to your roof and home.
During high wind events, wind speeds fluctuate, which create swirling effects, while simultaneously changing directions. Consequently, your roofing materials are lifted up, and allow windblown debris to lodge between shingles and the underpinning of your roof, thus creating damage. Wind-blown debris not only can dent and scar shingles and cut holes in your roof, but can accumulate in areas and clog gutters and downspouts causing water back-up.
Heavy winds can cause shingles to loosen, break or fly off your roof. Roofs can be damaged by winds of even moderate intensity, with gusts of 35 to 55 miles per hour.
The major cause of wind damage is from the partial vacuum created by wind blowing over the edge of your roof. Nature tries to neutralize the low-pressure areas by bringing in air from a higher pressure area, usually from inside your home. This air pushes up on the bottom side of the roof assembly, thus allowing the roof to be susceptible to damage from moderate or strong winds.
Wind blowing over a roof usually isn’t a problem until it starts to move materials. Materials may include the membrane of the shingles, felt, flashings, nails, ridge cap or vents. Anywhere material is even a little bit loose, the suction of the wind is going to raise it up, get below it, push it up and cause damage. Once the underside of roofing is exposed, rain can get in, and leak into the interior of your home. Wind damage can s grow worse through repeated cycles over time. The edge of your roof being lifted up starts a peeling effect and subsequent wind events worsens it and can cause water leakage. Strong winds can easily cause extreme damage to your roof!