Storm rating (windborne debris)
A windborne debris rating shows that a window or door passed a test for resisting flying debris and pressure from high winds.
In a severe storm, wind can throw objects at your house. A product with a windborne debris rating has been tested by striking the unit with test debris and then loading it with wind pressure. To pass, it must stay in the opening without a hole.
The rating belongs to the full assembly, so frame, glass and anchors all matter. It is usually built on impact-resistant glass and laminated glass. Not every home or code requires it, so ask your building department what applies. Learn about local storm risk in our post on North Texas hail season.
Related terms
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