Should I Crack My Windows During A Hurricane?

When It Makes Sense

• Good fit: A low‑category tropical storm (wind speeds under 74 mph) where the pressure differential is mild and you have sturdy, reinforced windows; a small crack may help equalize pressure without significant risk.
• Good fit: You live in a region where official emergency management advises a tiny vent to reduce pressure buildup, and you have a safe method (e.g., a pre‑cut vent hole with a removable board) that can be quickly closed after the storm.

When You Should Avoid It

• Warning sign: A major hurricane or Category 3+ storm with sustained winds over 111 mph; the forces are strong enough that any opening can become a point of failure, leading to shattered glass and debris entering the home.
• Warning sign: Your windows are old, glass is already compromised, or you lack protective equipment; creating a gap could cause the glass to blow out, endangering occupants and property.

Pros and Cons

Pros

• Potentially reduces interior‑exterior pressure differential, which can lessen the chance of a window blowing out in marginal storms.
• Provides a controlled way to release built‑up air if you have a purpose‑built vent, preventing sudden, uncontrolled shattering.

Cons

• Even a small opening can allow high‑speed wind, rain, and debris to enter, increasing damage to interior contents and personal safety.
• Opening windows can void insurance claims if damage is traced back to an intentional breach, and some jurisdictions may consider it a prohibited action during a declared emergency.

Decision Checklist

• What is the official category and projected wind speed of the storm?
• Do local emergency management agencies explicitly recommend or forbid venting windows?
• Is your window glazing rated for the anticipated pressure, and do you have a safe, quickly sealable vent method?

Alternatives to Consider

Instead of cracking windows, reinforce them with hurricane shutters, plywood, or impact‑resistant film. Install pressure‑relief vents designed for storms that can be closed securely after the event. Ensure your home’s overall structural integrity—roof straps, garage door bracing, and secure anchoring—so pressure issues are mitigated without opening a window.

Final Recommendation

For most homeowners facing a hurricane, cracking a window is not the safest first choice. Reserve it for low‑intensity storms where official guidance supports a controlled vent, and only if you have a reliable, resealable method. In higher‑category hurricanes, rely on proven protective measures like shutters and structural reinforcement, and always consult local emergency officials or a qualified contractor before taking action.