Roof Wind Ratings

Mark gallant jun 22 2020.

Roof wind ratings.

The 2020 atlantic hurricane season is off to the fastest start in recorded history and warmer ocean temperatures are expected to generate hurricanes and tropical storms with much more frequency and intensity. One thing to watch out for is an installer utilizing staples to install the roof. The minimum wind approval rating is 60 psf. A typical architectural laminate carries a 110 mph wind rating using 4 5 nails.

The first ratings in excess of 100 mph were those developed using an american society of testing and materials astm test standard astm d 3161 where 110 mph winds were blown over inclined surfaces of shingles for a one hour period. Consumers are pleased with the low price thickness of shingles and warranty coverage. The basic design wind speed v mph corresponds to a 3 second gust speed at 33 above ground in exposure category c and is associated with an annual probability of 0 02 of being equalled or exceeded 50 year mean recurrence interval. Only available in four colors.

With extreme wind events on the rise now is the time to. In most cases using staples will void the manufacturer wind rating warranty. Most customer reviews of pabco roofing shingles are positive. Class a fire resistance rating.

Class a for winds up to 60 mph class d 90 mph class f 110 mph class g 120 mph and class h 150 mph. These single layer shingles are typically rated for winds up to only 60 mph and moderate impact from flying debris or hail. For example if the pressure level was at 105 psf when the failure occurred the approval level would be set at the preceding level or 90 psf giving the assembly a 1 90 rating. The 3 tab 60 mph to 70 mph wind uplift rated roof covering shingles will be ripped off and leaks will be inevitable.

With all that said if we were to rank the roofing materials from best to worst for coastal living it would go like this. The most common type are 3 tab shingles. The height of the roof and exposure and risk categories are factors that are used to convert design wind speed to an uplift pressure. The same shingle qualifies for a 130 mph wind rating level 5 hurricane if you use 6 fasteners per shingle.

Architectural grade shingles rated to withstand wind gusts up 130 mph are your best bet for high wind areas. 110 130 mph wind warranty. Understanding wind uplift ratings for roofing. 6 1 see wind map worksheet of this workbook.

For basic wind speed map fig. This type of roofing material is classified based on wind speed resistance and with wind ratings categorized as follows.