Blow-offs refers to a situation where high winds or severe weather cause all or part of a roofing system to come loose or blow off entirely. This can result in exposed areas of the roof deck, underlayment, and even the interior of the building being exposed to the elements.

Blow-offs can be caused by a number of factors, including poor installation, insufficient fastening, inadequate wind uplift resistance, and poor maintenance. They can be especially common in areas with high winds, such as coastal regions, and during severe weather events, such as hurricanes and tornadoes.

Blow-offs can cause significant damage to a building and can be a safety hazard if pieces of roofing material fall from the roof. They can also result in costly repairs and the need for emergency services to temporarily cover the roof until repairs can be made.

To prevent blow-offs, it’s important to ensure that the roofing system is properly installed, fastened, and maintained, and that it meets the wind uplift resistance requirements for the building location. This may include using proper underlayment, securing the roof deck, and installing roof fasteners and other components according to manufacturer guidelines and industry standards.

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