A number of years ago we renovated our house and converted the existing garage to a guest bedroom and games room. we added a new garage that shares a wall with the guest bedroom. Unfortunately, any odors I generate in the garage (which I also use as a workshop) are passed through to the guest bedroom. Recently my pressure washer quit working and i stored in the grage for a couple of days until I could get to the repair shop. I didn’t realise it was leaking gasoline. The gas level in the guest bedrrom was almost 100 times normal for a house. What do I do to prevent this in the future ( i have moved all gas and other products out of the garage) but am concerned about even parking cars in the garage now if any odor can seep into bedroom.
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Well, you need to tightly seal between the two areas, and you probably need to vent the garage somehow.
Assuming the walls are drywalled and taped on both sides for your fire separation, the next step (first step if building properly the first time) would be to seal the bottom of the wood wall to the top of whatever it sits on. Is it on the old garage slab? Is it the old exterior wall? Are there old penetrations in the wall? is there a vent fan pulling air in from the garage?
Bedroom / Garage common wall
What product(s) would be used to seal the bottom of the wood wall (drywall and taped both sides) to a garage slab?
I would think either Peel-N-Stick or a mastic and fabric "bandage" (after thoroughly cleaning the surfaces, of course).
Polyuerethane spray foam, OSI caulk, saw dust mixed with Elmer's glue, left over fruit cake. In descending order of effectivness.
Yeah, but the fruit cake will outlive the others by decades.
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vapors lay close to the floor (one reason for keeping water heaters and furnaces up off the floor a foot) .
So, any low penetrations in that common wall (outlets etc)?
not likely, but is there a floor drain in the new garage that might have been hooked up in line to the old garage drain?