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Uplift ResistanceTesting at Clemson University's Civil Engineering Department shows that roof structures can be strengthened to increase uplift resistance from 2 to 4 times the strength of nails alone.
Building Code required nailing patterns should develop sufficient uplift resistance for winds developed in lower category Hurricanes (Category I, II and III). However, if the building envelope is breached, internal pressures can double, thus exceeding sheathing uplift resistance. That causes roof failures. Category IV and V hurricanes may develop sufficient uplift to remove roof sheathing without window or door failure.
Increasing the uplift resistance of a roof structure can easily be accomplished in many instances through the application of FoamSeal Hurricane Adhesive. Product Testing Information:
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Updated: 10/23/2008 |
Copyright ©2007 FoamSeal Hurricane Adhesives - All rights reserved. |
