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Santa Rosa Beach Roofing: Article About Roofing Wind Ratings

Art Construction: Honest Roofers Santa Rosa Beach FL
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While most homeowners know that heavy rainstorms and hail can potentially damage their roofs, not all know that wind can also be particularly damaging. Not only can the wind cause the shingles to be blown off completely, but the wind can also loosen the shingles and allow moisture to enter into the living space. A Santa Rosa Beach roofing contractor can help homeowners whose roofs sustained damage due to the wind.

Wind uplift occurs when air pressure below the roof becomes greater than air pressure above the roof when the wind flows over a building. As the pressure beneath the roof attempts to escape, the pressure puts a certain amount of force on the roof materials. If the force is great enough, the wind can cause some of the roof shingles or even some of the other roof components to blow off.

Asphalt shingles come with a wind rating and a corresponding classification letter. There are three classifications: Classes D, G and H. Class D shingles are rated to withstand winds up to 90 mph. Class G shingles can withstand winds up to 120 mph. Class H shingles can withstand winds up to 150 mph. In order for the shingle to be able to withstand the amount of wind uplift, it should be noted that the shingles must be properly applied to the roof decking.

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If the shingles are not affixed as designed, it is likely the shingle will not hold up.

There are also certain factors that influence resistance to uplift that should be considered when making a shingle purchase. These factors may include the building's height, the type of roof sheathing or decking and the terrain surrounding the building. All three of these factors can affect how the wind flows over the landscape, which can influence the amount of force the wind may exert on the roof.

Any damage that does occur to a roof will be affected by the direction from which the wind is blowing. The areas that are most likely to suffer damage include the upwind eave edges, rakes and corners and the downwind side of the roof ridge. If the wind can loosen some of the roofing material, it is likely that the material will be displaced. In other cases, the wind can damage the shingle adhesive and nails that bind the shingles to the roof decking. A roofing contractor can determine if the roof has been damaged by wind and provide appropriate options for repairs.

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