Roof Damage Wind Speed

Roof shape and slope wind speed and load will react differently on different roof shapes and slopes.

Roof damage wind speed.

Class f for shingles that passed testing at 110 mph. 45 57 mph. As wind moves over a roof its effect is not uniform. 58 74 mph.

These non severe winds may cause some tree branches to break off and can cause damage to already loose or susceptible shingles. Roofing material condition roofing materials in poor condition will naturally be more susceptible to wind damage. Certain regions will be subject to higher pressures such as along the perimeter. 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.

Factors that can accelerate wind damage. Class d for shingles that passed testing at 90 mph. Astm d7158 or the standard test method for wind resistance of sealed asphalt shingles uplift force uplift resistance method. According to the national weather service slight damage can begin when winds reach 45 mph but this range is considered non severe.

According to the national roofing contractors association nrca most wind damage to a roof starts on the edge. Shingles roofs especially take a beating during high winds despite most being rated to withstand 90 mph winds. Damage to your roof can begin at around 50 mph so you should know how to check your roof for such damage. There are several types of damage high winds can cause to your roof including leaks missing shingles and gutter problems.