I live in an old house, built in 1925. It has no AC and hardwood floors.
I swear, this house produces an unbelievable amount of dust. There is the standard powdery variety which accumulates on every horizontal surface, and there is a fluffly fibery kind that accumulates in the corners and hangs from long strings of cobwebs from the ceiling.
Where in the world is all of this dust coming from?
Maybe from lead-based paint? Or from the way the house was constructed? Supposedly concrete slab construction allows condensation to form when the cold cement contacts the warm house.
My e-mail is on the link (profile) below my posts.
To test the air, there are two methods…
One, call a friend in construction or architecture, and have them visit the house. The smell will give it away immediately if it is dry rot, as I suspect it is.
Two, look under ‘damp-proofing’ in your local yellow pages - anyone there should be able to give you advise, or even a free consultation. Give them a call to discuss.
Should point out though, if it is dry rot you could be in a world of hurt, financially. Unlike wet rot, which can be just cut out and the timbers replaced, dry rot is airbourne and the whole place would need to be sealed and fumigated, any rotted timer removed and replaced, and there’s still no guarantee the service will catch all the pores. So, it may come back eventually.
I hope for your sake it is not this, and some other simple fungal growth. Open the windows and turn on the heating up full, and see if it clears any. (Air changes/ hour in the room is key).