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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.
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.
Specifics of the CSA A123.21 Standard. The test itself is a measure of the dynamic wind uplift resistance for membrane roofing systems. This includes mechanically attached, adhered and partially attached (hybrid) membrane roofing systems. A sample roof assembly of 12 by 24 feet is tested to a maximum pressure differential of 100 lbs/sqft.
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.
May 16, 2022 · A sealed roof deck is a secondary layer covering your primary roof, commonly composed of engineered wood panels with a water-resistant barrier and advanced acrylic tape. According to the IBHS (Insurance Institute for Business & Home Safety), "A sealed roof deck can reduce water entry by as much as 95%." FEMA's direct recommendation is that ...
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.
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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.
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