What garage fire‑separation upgrades are minimally compliant when converting to a gym or office?
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Hey, make sure you double-check with your local building department because the rules might be a bit different depending on where you are.
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To meet minimum fire separation requirements when converting a garage to a gym or office,
Install 1/2 inch drywall on walls and 5/8 inch Type X drywall on ceilings if there’s living space above.
Replace the garage-to-house door with a 20-minute rated, 1-3/8 inch solid wood or steel door that self-closes and latches.
Seal any gaps or penetrations with fire-rated caulk or foam. Avoid direct openings into bedrooms, as these are typically not allowed. While not always required, insulating or raising the floor may help with comfort and moisture control.
Always confirm specific code requirements with your local building authority.
At minimum, you’ll need fire-rated drywall on walls/ceiling shared with the house, a self-closing solid-core door, and sealed gaps to keep fire and fumes out.
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