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Water IntrusionRoof sheathing is installed with a 1/8" to 1/4" space at the seams. Therefore, this leaves gaps of 12 to 24 square inches per4x8 sheet of sheathing. A 4,000 square foot building can have approximately 200 sheets of sheathing; thus, a fully exposed roof deck could have up to 33 square feet of open space for water to enter the building. This is the equivalent of 1 full sheet of plywood not installed.
Testing shows that the application of FoamSeal Hurricane Adhesive to the sheathing seams reduces water intrusion. Roof coverings (shingles and tile) are usually the first things to fail in high winds like those experienced during hurricanes.
Once the roof covering fails, water intrusion is likely and significant damage to the building and contents occurs even if the roof sheathing stays in place. Product Testing Information:
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Updated: 10/23/2008 |
Copyright ©2007 FoamSeal Hurricane Adhesives - All rights reserved. |
