4 ms·I run my bathroom fan for hours after I shower. Drywall is a sponge after allby thsksbd 3y agoI run my bathroom fan for hours after I shower. Drywall is a sponge after allsonofhans 3y agoNot painted properly, it isn’t. Moisture protection is one of the primary benefits of paint.thsksbd 3y agoUnless you're using a speciality paint, latex is too porous (for vapor, not liquid water) and gypsum too large a chemical potential well.sonofhans 3y agoYeah, “properly” was doing some work in my response :) It helps to use a glossy paint, and to put that over wet-environment primer on top of wet-environment drywall.thsksbd 3y agoCool. Rhanks for the reply