Roof Damage Wind Speed

According to the national weather service slight damage can begin when winds reach 45 mph but this range is considered non severe.

Roof damage wind speed.

Certain regions will be subject to higher pressures such as along the perimeter. Class d for shingles that passed testing at 90 mph. 58 74 mph. According to the national roofing contractors association nrca most wind damage to a roof starts on the edge.

In between breezes and twisters is a whole range of wind speeds that incrementally damage the roof system. These non severe winds may cause some tree branches to break off and can cause damage to already loose or susceptible shingles. As wind moves over a roof its effect is not uniform. Roof shape and slope wind speed and load will react differently on different roof shapes and slopes.

The effect of wind moving over a roof is not uniform. Shingles roofs especially take a beating during high winds despite most being rated to withstand 90 mph winds. There are several types of damage high winds can cause to your roof including leaks missing shingles and gutter problems. Astm d7158 or the standard test method for wind resistance of sealed asphalt shingles uplift force uplift resistance method.

These differences can also account for the amount of damage sustained. Roofing material condition roofing materials in poor condition will naturally be more susceptible to wind damage. 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. Damage to your roof can begin at around 50 mph so you should know how to check your roof for such damage.