How do I fix the humidity problem in my bathroom?


I have an exhaust fan in my master bathroom but still have moisture running down the walls after showing. We move to a coastal community this year and it seems the bathroom humidity after showers is extreme. Thanks!Carol

  7 answers
  • Kathy Gunter Law Kathy Gunter Law on Dec 10, 2018

    I added a small ceiling fan light fixture to help out my exhaust fan. You could also try Damp-Rid or similar product.

  • on Dec 10, 2018

    Do you run a dehumidifier? That can make a world of difference!

  • Michele Henaghan Michele Henaghan on Dec 10, 2018

    I use a product I bought at the Dollar Tree store called Moisture Eliminator. It comes in an odd shaped white container with a blue honeycomb lid and there's orange coloring on the label as well and you just open it and set it on a shelf. It costs only $1 and I keep one in my bathroom AND my basement (which also tends to trap moisture) and it dries EVERYTHING out and even eliminates the mold/mildew smell as well! I put up a new one about every 6 -8 weeks. Greatest product ever! They always have such a hard time keeping it on the shelves!

    • Carol Carol on Dec 10, 2018

      Hello, I do use the product you’re talking about, it fill up with water fairly quickly and I replace as needed. I also always leave the bathroom door open when showering and leave the exhaust fan on.

  • Molly Anmar Molly Anmar on Dec 10, 2018

    It's possible your fan isn't removing the moisture. A typical bath fan is rated to move 50 cubic feet per minute of air when it's operating, but most actually move about half of their rated air flow.

    First, test your fan to see whether it has suction. Turn it on, then take a piece of printer paper and hold it in your palm, close to the fan. If your fan motor is operating properly, it will suck the paper up to the grill and hold it there. If the fan ISN'T moving air, you probably need to replace the motor.

    The other thing could be that you're trying to run the fan with the door closed or turning it off too quickly after showering.

    Unless your bathroom has a large gap between the bottom of the door and the floor or some other way for air to get into the bathroom, the bath fan will quickly be pulling against a pressure that makes it difficult to move much air. Every cubic foot (or cubic meter for those of you outside the US) of air that the fan removes from the bathroom must be made up by a cubic foot (or cubic meter) of air coming in. When those cubic feet get hard to pull in, they aren't going out as easily either.

    What this means is that you need to run the bath fan with the door open for a while to get a decent amount of air exchange. Don't just turn the fan off when you leave because it probably hasn't done enough yet.

    Read more here:

  • Crack a window if there is one, use a portable fan, install a dehumidifier.

  • Oliva Oliva on Dec 10, 2018

    Even using an exhaust fan during showers and for 20 min. after, you may need to wipe down walls and ceilings after showers. Wipe the curtain liner, if you use one, and pull the exterior curtain up after showers until everything is dry. If your shower is in a tub, wipe down any remaining water.

  • Hi Carol - With all of that humidity, you will need to be careful about mold. This article addresses mold, but also touches on the humidity issue too. Hope this helps! Hugs, Holly