i am remodeling a small bathroom (8 x 7). i have problems with peeling paint (moisture). it has regular drywall installed at the moment. the exhaust fan is ducted out the side of the house with a 5' run. is there a better product to use in this small high moisture area than greenboard? i will be repainting the surface. also would it be better to use a humidistat controlled exhaust fan or a fan connected to a timer switch. any other ideas that might help with my peeling problem would be appreciated. thanks.