Roof Damage Wind Speed

45 57 mph.

Roof damage wind speed.

Class d for shingles that passed testing at 90 mph. Certain regions will be subject to higher pressures such as along the perimeter. There are several types of damage high winds can cause to your roof including leaks missing shingles and gutter problems. The effect of wind moving over a roof is not uniform.

Class f for shingles that passed testing at 110 mph. 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. Roofing material condition roofing materials in poor condition will naturally be more susceptible to wind damage.

58 74 mph. Roof shape and slope wind speed and load will react differently on different roof shapes and slopes. These differences can also account for the amount of damage sustained. Shingles roofs especially take a beating during high winds despite most being rated to withstand 90 mph winds.

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 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. Factors that can accelerate wind damage.