Roof Tiles Wind Speed

Likelihood of shutter puncture 100 120 mph bsw.

Roof tiles wind speed.

Recently i have received reports from some engineering firms hired by the insurance companies that have been stating in unison that wind does not affect the structural integrity of a cement tile roof. 45 57 mph. A standing seam roof and the water shedding roofing system. As you may all know we have suffered several hurricanes over the past 2 years.

Whilst the over 60 degree statement does agree with bs5534 below 60 degrees it only complies in low wind uplift situations. Some metal roofing can withstand wind speeds of more than 150 mph. Assessment of wind borne tile impact on approved missile impact resistant products presentation given 12 11 2004 to hrac paper under peer review in wind and structures key findings re. If you want the best roof for high winds the decking under the shingles needs to be strong and sturdy and your fastners should be high quality.

So what wind speeds do you need to be worried about. Furthermore the roofing designer or specifier sometimes assumes if there is a design wind speed requirement of 90 mph then the roof system must have a 1 90 rating which is not always true at least not for the reason they think maybe for tall buildings or if other factors exist. Craftsmanship is also important. The cost of the roofs with a wind resistance is higher than the average one.

There are two types. Alot of the homes in this area have cement tile roofs. Independent testing sponsored by tri alliance shows that with proper attachment clay and concrete roof tiles can sustain winds in excess of 125 miles per hour that would strip off most other roofing materials. Prone regions where the basic wind speed is equal to or greater than 110 mph 3 second peak gust the windborne debris issue is of greater concern than in lower wind speed regions.

Proper installation will only end the damage caused by high winds. Ul s test method ans ul 2390 has found the wind resistance of asphalt shingles with sealed tabs to be between 60 to 150 mph. Monier guide to wind classification 3 what is wind classification step 1. Minimal risk except for long flight distances 45 m in exposure c and d.

There are currently no testing standards requiring roof tile systems to be debris impact resistant. Consumers can check individual ul listings usually present on the product packaging to find out the wind velocity resistance of individual brands. Geographic wind speed region determining a wind speed classification the wind classification relates to gust. Whilst the nhbc technical manual seeks to simplify the requirements of roof tile fixings it would appear that for some roofs have passed the nhbc final inspection with roof tiles that are not adequately fixed to comply.