Crawl space: What am I smelling, and what do I do about it?
I’ll try to be concise. I’d hoped not to have to ask for help but I’m out of ideas.
The house is 75 years old, pier and beam, climate zone 2. The crawl space has been encapsulated in the past couple years. Mold treatment was applied, but I don’t know what kind. Probably the cheapest kind.
The smell is strong, consistent, and rapidly causes throat irritation in the same way sawdust does. Wearing only sediment filters (the pink ones) did not feel like it was completely effective.
The humidity is controlled via a whole house dehu in the crawl space. I’ve not run a dedicated return nor a dedicated supply vent, nor have I installed a jumper. That said, much of the original flooring is still in place, so there’s leakage.
It’s not a chemical smell. It’s not a “cat pee” smell. It’s not from animal leavings nor from a dead animal. It’s not any of the smells I could find as “common odors after crawl space encapsulation.”
My guess from reading the resources on this site, as well as energy vanguard, and hell even yahoo answers, is that it’s from 75 years of mold that is now dead from dehydration getting in the air, but if that were the case I’d expect the sediment filter to be closer to 100% effective.
At this point, it’s more important to me just to figure out exactly what the problem is. Then it’s just a matter of solving it.
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