Not sure where to put this, but I was on an inspection about a week ago and the question came up about bathroom ventilation. Toilet is in a separate room that can be closed off from the rest of the bathroom, which has both a shower and tub. The main part of the bathroom over the tub and shower did not have a vent or operable window.
IMO, both the toilet room and the main bathroom should have a vent, especially the main bathroom to remove humidity. But, I can’t find anything to support my argument. Any help would be much appreciated!
First two pictures are of the toilet room. Second pictures are of the rest of the bathroom.
John, I would just state that a better way or “best practices” would have included ventilation in the tub/shower area to help remove moisture from that area. Although not wrong, the ventilation in the toilet closet will help, but is probably not as efficient as having two.
A window is a source of ventilation and considered by codes as ventilation.
How many open that window when they take a shower? Do we need to regulate people so they do? Can you determine this through a home inspection? If you see issues because of inadequate ventilation, by all means call it out.
I see a large crack under the interior doors. Does that allow some ventilation? How often is someone taking a shower and using the toilet for the entire duration?