Windows, doors and gable end wall construction
Openings are the weak link
Windows, doors, garage doors, skylights, and gable vents are openings in the envelope. Under wind load they receive pressure and debris impact. Protection must cover every exterior opening to earn the “all openings protected” category. Impact-rated glazing, approved shutters, and rated garage doors are common solutions.
Gable end walls
A gable end wall is the triangular wall under a sloping roof. It is vulnerable to racking and overturning when bracing, sheathing attachment, or connection to the ceiling diaphragm is weak. Look for proper stud-to-track connections, diagonal bracing, and a continuous load path. A gable vent is also an opening.
Worked example
A house has impact windows and a rated garage door, but the sliding glass door has only a screen. The screen is not opening protection. Because one opening is unprotected, the “all openings” category is not met. The reasoning is binary for that category: one gap defeats it.
Traps
- Counting insect screens as protection.
- Inspecting windows but forgetting the garage door.
- Missing a gable vent or skylight.
- Accepting a label on one window as proof for every opening.