Chemical/ Cat Urine Odor in Crawlspace
Have a 50s built house. HVAC company just put in a vapor barrier. Strange smell coming from the crawlspace. We put in two vent fans to help but it still smells and even with new sealed ductwork can smell faint plastic-y smell in house when AC comes on.
I’ve seen comments on ‘cat pee odor’ & off-gas smells after encapulation etc. This is not encapsulated, just barrier. I’ve read possible causes from decaying vegetation to the barrier itself. What I’ve noticed is that most the folks with problems are on the Mid-Atlantic to Southeast US and possibly in older homes. I do know that we have residue of chlordane (a banned pesticide) in our crawlspace (applied over 30 years ago!), which is the reason for now putting the vapor barrier and fans in…It was pretty common for termite treatment and I would bet the Mid-Atlantic to Southeast US received the most treatment for termites….
The crawlspace had an odor before but more like dirt/musty and not chemical.
Could the chlordane residue be interacting with the plastic???
I know that tapwater treated with chlorine dioxide interacts with new carpet to cause ‘cat-pee’ odors….could something similar be happening here?
Need an EXPERT please!!
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