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Question DetailsAsked on 5/24/2016

I have an odor in a mobile home, primarily on one side - very prominent in one bedroom. Kind of a sour smell?

Have painted entire home, carpeted - checked for and treated stains on floor (Killz). Wondering if I have dead animal(s) somewhere? Would think the smell would disappear after a while if dead animals (has been several months) - smell never goes away but does improve then get worse. Not in duct work, had completely cleaned...Would it be prudent to call an animal / pest control company?

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Here are some prior similar questions with responses including laundry lists of possible causes - unfortunately, only way to track down is you or maybe a Handyman or Animal Removal (your Search the List categories) contractor sniffing around the entire place, inside and out and under, to track down the source. Don't forget sniffing at each light fixture and outlet and along the base of all walls - because if it is in the walls those locations are the likely places where the smell is migrating into the house.

Another DIY method - using cheap thin painters visqueen (a few $ packet should do the job with some reuse) to tape of rooms one by one for a day or so, to see which one the smell concentrates the most in. 

On the several months thing - I have encountered dead animals in the walls or flooring and such that smelled quite bad, depending on amount of airflow and especially on temperature if in "outdoor" but connected place like crawlspace or under-framing, that went on for 3-4 months for squirrels and possums and coons and such in fairly confined spaces - and of course a large animal body smells for months to a year or more to decompose to the point of skeletonization if not exposed to ventilation and insects.

Personally, I have never found a dead animal other than insect nests (living or dead) which smelled "sour" - putrid or rancid or rotten grease smell yes, but sour would not be the primary description - so my first guess would be water leakage causing fungal growth, which commonly smells like sour vegetables or acid smelling mushroom/toadstool smell. Also, check underneath for possible fungal growth or skunk cabbage or such under the mobile home which could be stinking up the unit without actually being "in" it.

Answered 4 years ago by LCD

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