Ghost Smell from Hell!
I recently remodelled a small bedroom in my house because the plaster and lathe was in bad shape and falling down. I stripped all the walls and ceiling and put up new sheetrock plus insulated the walls. I also had to put down a new bamboo floor. After painting and trimming the room nicely all was well for about 2 months, then the smell from hell appeared one warm day. It smells like a vinegary combination of B.O. and dead animal with hints of ammonia and fermentation. It comes and goes VERY erratically, by the minute. Some days it never appears, others it smells off and on. The smell does not appear in the attic above the room or in the crawl space below, or in the alleyway outside the window. There is no plumbing in the room. The odor does not come from a specific place in the room. It does smell stronger near one wall pretty consistently. It is stronger when it is hot out, but also smells when it is cool. It does not come from the heater vent. We turned all the power off in the house when the smell was strong thinking it was electrical, it had no effect. This has been going on for a month now, the room is unusable and uninhabitable when the smell rears its ugly head. The rest of the time there is no trace of it. Fresh paint, fresh floor, fresh sheetrock, no carpet. We think it might be an animal but it shows no sign of abating after a month. No flies, no animal sounds, also I sealed up the walls with spray foam when they were open and filled them with fiberglass batts. Any ideas? We are at our wits end.