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Mar 3, 2023 · The uplift resistance of a roof assembly is listed as Class 15, 30, 60 or 90. The spectrums of 15-90 are comparative ratings, which are unrelated to specific wind speeds. For example, Class 90 involves 56.5 psf vacuum pressure and 48.5 psf upward pressure from below on a 10’ x 10’ specimen anchored at its perimeter.
Mar 1, 2021 · The uplift resistance of a roof assembly is listed as Class 15, 30, 60, or 90. The spectrum of 15 to 90 is comparative ratings, which are not related to specific wind speeds. For example, Class 90 involves 56.5 psf vacuum pressure and 48.5 psf upward pressure from below on a 10′ x 10′ specimen anchored at its perimeter.
Jan 18, 2024 · Wind will hit a Category D structure first, taking the brunt of the force of the wind. It’s important to look at exposure categories because these will affect your project’s design pressures. If your roofing project is in a category B exposure category, you may not need as high of a design pressure as a roof that’s located somewhere right on the water.
May 15, 2023 · When the wind uplift force exceeds the roof's ability to resist it, the roofing materials can be partially or completely blown off, leaving the underlying structure exposed to the elements. Damage to roof components and attachments. Wind uplift can cause fasteners, adhesives and other roofing components to fail.
- Trevor Underwood
Apr 15, 2024 · Wind uplift tests for roofs are absolutely important, especially if your spot gets its fair share of windy weather. We're talking about sticking to the rules, sure - like CSA A123.21 certification - but it's more than compliance and making sure your roof doesn't end up in your neighbor's backyard during the next storm.
Wind ratings for roofs are essentially measures of a roofing material’s ability to resist wind uplift or damage under specific wind conditions. These ratings are crucial for homes located in areas susceptible to strong winds, as they provide insights into how well a particular roofing material can withstand the forces exerted by high winds ...
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Dec 26, 2023 · 1. Choose a Proper Roof Shape. Selecting the right roof shape is needed to preventing wind uplift damage. Opt for a design with steep slopes and an aerodynamic profile, as these minimize the surface area exposed to wind. This reduces the potential for uplift forces and helps maintain the stability of the roof.
