I have a room mate who loves to just sit in the shower tub with the shower raining over him. He sits in the shower for 2 hours or longer easily (not over exaggerated), just watching youtube videos. He's also taking steam showers. He showers very very hot, producing a lot of steam and causing water to literally drip down the drywall.
The fan in the bathroom simply cant work that hard and suck up all the moisture fast enough. I have told him many many times to take a bath instead because we're guaranteed getting mold development, but he gives me an excuse that he prefers the rain showers.
If the bathroom fan is on AND the bathroom door is open, keeping the temperature in the bathroom cooler, does that resolve the moisture/mold problem? Or are you guaranteed getting mold no matter what if you steam shower and shower that long?
I am also not sure if leaving the bathroom door open would be a good idea, potentially having the moist air going outside of the bathroom as well.
We constantly argue over this and we're both adults so I can't really do much to him in terms of treating him like a child and shutting off the main water supply or something like that so I'm really looking for a second opinion that I can show him.
A compromise would also work, such as a fan on AND bathroom door open. If that's the golden solution to prevent mold with long steam showers then that's acceptable for me as well. He is paying for the extra heat and water charges anyway. I just don't want mold in this still brand new house.