Damage & Failure
What is Blow-Off?
Roofing Glossary · Damage & Failure
Definition
The loss of shingles or roofing material from the roof surface due to wind forces exceeding the installation's wind resistance capacity. Blow-offs most commonly occur at roof edges, ridges, and hips where wind pressure is highest. They are caused by insufficient fastener patterns, failure of the sealant strip to bond (especially in cold weather installations), or use of shingles rated below the local wind requirement.
Related Roofing Terms
→
Wind UpliftThe aerodynamic force that acts upward on a roof surface, particularly at corners, edges, and ridge ...
→Wind ZoneA geographic classification system that defines the design wind speeds for which structures in an ar...
→Hand-SealingThe manual application of roofing cement or activating pressure to the sealant strips on shingles in...
→Fastener PatternThe specified number, type, and placement of nails or staples used to secure roofing materials to th...
More Damage & Failure Terms
Get an Instant Roof Estimate
Now that you know what blow-off means, put that knowledge to work. Enter your address to get a free satellite-based estimate and compare standardized quotes from pre-vetted local contractors.
Get My Free Estimate