We just bought a new construction home. We have some trash in our garage bin that does have a potent smell, but I assumed it'd stay confined to the garage. This evening while putting my daughters to bed, I noticed I could smell the trash faintly throughout their room - I could smell it enough to know it was the trash from the garage though.

It seems if the vapors from a trash bin can reach through their floor (literally directly above the garage -- we can feel the garage door vibrate in their floor), other more harmful vapors (co2 from the car? vapors from hot water heater?) could seep in too.

Should I be concerned about this?

2 Answers 2


Perhaps, maybe if you have a gas boiler installed in that space,as some people might, or your cars are inefficient. Consider installing Carbon Monoxide detectors, as CO poisoning can be a concern. Its odourless, and can damage by binding to haemoglobin.


Your garage is probably not properly sealed. It's a fairly common issue, sadly. Few people think of off-gassing from cars putting fumes into living areas. I would also venture to say that you might not have a properly insulated garage ceiling either.

Things I would do

  1. Check to make sure they completely sealed the garage. Corners are the most common culprits. They should be drywall taped and/or caulked (if they put up crown)
  2. Check for open/unfinished areas in the drywall. Enclose them if they are present.
  3. Cut a small hole in the garage ceiling drywall. Make sure there's insulation there or you may have a nasty surprise come Winter

Your Answer

By clicking “Post Your Answer”, you agree to our terms of service, privacy policy and cookie policy

Not the answer you're looking for? Browse other questions tagged or ask your own question.