I do not believe mothballs got into the walls maybe a few but not many.
Mothballs in attic odor.
This can become quite troublesome.
Charcoal will soak up odors as well and help remove the moth ball smell.
My guess is that the moth ball vapors are heavy and sinking into the house.
Well here is the weird thing the smell is almost completely gone from the attic but the house reeks so bad that we can t stay there.
To get rid of this smell it s recommended that you never use any sort of air freshener to cover up the smell.
Indeed the odor from mothballs is a voc like substance paradichlorobenzene or naphthalene that quite penetrates many materials including even drywall furnishings carpeting and it can take quite a while for it to diminish.
Mothballs are a common home remedy due to their pesticidal properties and ability to negate other bad smells.
A relatively common mistake is placing mothballs in an attic to repel squirrels.
Once your mothballs have dissolved they ll usually leave a very annoying odor especially if you use them in an indoor area like your basement your attic or the inside of a shed.
Put out a bowl of vinegar or coffee grounds to help absorb the odor.
The problem is that mothballs are themselves rather unpleasant smelling and tend to leave that odor behind long after the balls themselves dissolve.