Roof Damage Wind Speed

Factors that can accelerate wind damage.

Roof damage wind speed.

Shingles roofs especially take a beating during high winds despite most being rated to withstand 90 mph winds. The effect of wind moving over a roof is not uniform. Certain regions will be subject to higher pressures such as along the perimeter. These differences can also account for the amount of damage sustained.

These non severe winds may cause some tree branches to break off and can cause damage to already loose or susceptible shingles. According to the national weather service slight damage can begin when winds reach 45 mph but this range is considered non severe. Areas like the corners and perimeter of the roof can be susceptible to higher wind pressures while the center of the roof might have lower stresses. Class d for shingles that passed testing at 90 mph.

As wind moves over a roof its effect is not uniform. 45 57 mph. 58 74 mph. There are several types of damage high winds can cause to your roof including leaks missing shingles and gutter problems.

In between breezes and twisters is a whole range of wind speeds that incrementally damage the roof system. Class f for shingles that passed testing at 110 mph. Astm d7158 or the standard test method for wind resistance of sealed asphalt shingles uplift force uplift resistance method. According to the national roofing contractors association nrca most wind damage to a roof starts on the edge.