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FAA_Arch · 02-27-2007, 02:13 PM

We've seen this happen before. It can vary. We've seen dry traps and we've seen rodents cause these smells. It's worse in the winter months. The heated air rises through the house. The heated air eventually works its way out through the walls, windows, attic, etc. This causes a negative pressure in the lower levels. This negative pressure will draw odors in from the dry traps, joints in the basement slab and other opening in the lower levels.

I recommend checking all the traps. Make sure they have water in them. I would also take a close look at the foundation walls and the basement slab. Any penetrations in the walls and slab should be sealed.

02-27-2007, 02:13 PM	#8
FAA_Arch Junior Member Join Date: Jan 2007 Posts: 3 Thanks: 0 Thanked 0 Times in 0 Posts	Odor in basement We've seen this happen before. It can vary. We've seen dry traps and we've seen rodents cause these smells. It's worse in the winter months. The heated air rises through the house. The heated air eventually works its way out through the walls, windows, attic, etc. This causes a negative pressure in the lower levels. This negative pressure will draw odors in from the dry traps, joints in the basement slab and other opening in the lower levels. I recommend checking all the traps. Make sure they have water in them. I would also take a close look at the foundation walls and the basement slab. Any penetrations in the walls and slab should be sealed.