I have a mildew problem on the ceiling above my shower. I do not have a window in the bathroom. I want to paint, but am worried it might just be covering a problem instead of repairing it. I use bleach about every 2 weeks to clean the ceiling and walls, and its does make the appearance on the mildew go away for a few days. What would be the best thing for me to do?
So how do you prevent mildew from growing in the first place? Reduce or eliminate the food source by cutting down on the amount of moisture, usually condensation, which settles on walls, floors and ceilings. This may not be as simple for someone who lives in Florida as for a family in West Texas, but, given varying degrees of attention, eradication is possible even in relatively humid climates.
The fact that you don’t have a window in your bathroom means that ventilation may be poor. Moreover, the lack of natural light provides optimal conditions for mildew growth.
According to Building Code, a bathroom without a window must have an exhaust fan to remove moisture and unpleasant odors. Unfortunately, bath fans are often undersized, broken or simply not used. If you have an exhaust fan, make sure that it is cleaned periodically, that the duct is properly connected and in good shape and that it is always used during showering and allowed to run for 10 to 15 minutes after the shower. Also, check the CFM rating on your fan housing (that’s the amount of air that the fan moves expressed as cubic feet per minute) — anything less than 80 cfms is usually too small for most American bathrooms. Consider upgrading to a larger model is such is the case.