Fire-Rated Drywall & Garage Separation

What the code asks for and why

Most codes require at least 5/8 inch Type X drywall, or equivalent, on garage walls shared with living space and on ceilings under habitable rooms. The goal is to slow fire spread and keep carbon monoxide from entering the home. Details matter: board must be tight, seams taped and the entry door must be solid or fire-rated and self-closing in many jurisdictions. Your local building department can confirm the exact rule for your house and tell you whether an inspection is needed. Share any access limits, pets, parking or building rules in advance so the crew arrives prepared and the visit runs smoothly.

Gaps, penetrations and details inspectors check

Even perfect drywall fails if holes are left in it. Pipes, ducts, wires and recessed lights that pass through the barrier must be sealed with approved fire caulk or collars. Attic hatches in garage ceilings should be rated and gasketed. Ducts that run from the house into the garage are usually prohibited. A careful pro walks the perimeter, photographs the penetrations and seals them before finishing the surface. If you are comparing quotes, line up the scope, materials and schedule side by side, because the lowest number is not always the same job.

Finishing a garage that is also a workspace

A garage wall takes more abuse than a bedroom wall, so a durable finish helps. Many owners choose a Level 3 or 4 finish with a washable paint, and some add plywood or pegboard on the lower portion for storage. Texture hides dings. Make sure outlets, shelves and cabinets are anchored into studs, and keep stored chemicals and fuel in appropriate containers away from heat sources. Save any inspection record with your home file for resale. Check that the pro carries the right license and insurance for the work, and ask to see them before the job starts.

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