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garage under house

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  • garage under house

    Are there any issues to worry about with having a garage under the house (i.e. in lowest level of house), in a newer home?

    I can think of two: water drainage if the driveway slopes down to the garage, and cold floor in rooms above garage in case of poor insulation on the roof of garage.

    Any others?



  • #2
    Re: garage under house

    Check with the local town/county office for any code requirements for attached garages. Be specific and ask about living quarters above a garage. The garage must be sealed completely so that any exhaust gasses from the automobiles from permeating into the living quarters.
    I put it all back together better than before. There\'s lots of leftover parts.


    • #3
      Re: garage under house

      The Dry wall (wall coverings) will probly need to fire rated, for how long you will need to check with your local codes.
      Push sticks/blocks Save Fingers
      "The true measure of a man is how he treats someone who can do him absolutely no good."
      attributed to Samuel Johnson
      PUBLIC NOTICE: Due to recent budget cuts, the rising cost of electricity, gas, and the current state of the economy............the light at the end of the tunnel, has been turned off.


      • #4
        Re: garage under house

        Aside from code requirements there may be a significant difference in insurance premiums.
        "It's a table saw, do you know where your fingers are?" Bob D. 2006


        Time, cost, or quality; pick any two but you can't have all three.


        • #5
          Re: garage under house

          Just finishing up a garage that's under our living space.

          I ended up putting R-30 in the floor joists, doubling 5/8 fire rated sheetrock & sandwiching this stuff in between the two layers of sheetrock, for it's sound damping qualities.

          With the insulation, doubled 5/8 sheetrock & the Green Glue for sound damping, we don't hear squat in the living areas from the garage (even with compressor running) & vice versa.

          I also installed an automatic fire sprinkler system in the garage.

          Knowing cars sometimes spontaneously combust, even hours after you've parked them, that just didn't sit well with me knowing I was sleeping directly above.

          Way overkill as far as code compliance (could've gone with the fire rated sheetrock or the sprinkler system & either would've been satisfactory), but I sure do sleep better at night.

          Last thing I did was hang an air scrubber with Charcoal Filter for the CO-2 & install a hard wired ~ battery back up CO-2 / Smoke Detector combo.

          End result, Building Inspector was tickled pink with how I did the garage & our Home Owners Insurance has gone down 10% because of the automatic fire sprinkler system.