mayhem69

Hi, before i remodeled my bathroom i was getting mold or mildew on the ceiling because of all the moisture. I do have a 70 cfm exhaust and the room is about 65 sq. ft. with 8 ft. ceiling. However i did use very cheap paint in the bathroom 10 yrs. ago.
Just finished completely remodeling the bathroom with new bath and surround, Behr bath paint.
There are 4 of us taking showers in there and when we're done the ceiling is soaking wet, along with the upper part of the walls. Is this normal? I checked the exhaust fan by putting a piece of paper up to it and it does suck it in. I am attaching a picture, check it out and tell me what you guys recommend. My mom did buy those 2 x 2 plastic squares from Lowes for $20/pc. and glued them to her ceiling. I just don't know if i'm freaking out for nothing, but i know i don't want the mold on the ceiling again. But now i do have bath paint on the ceiling and walls. Any suggestions please! pic attached

inspectorD

Where does the exaust fan exit to? Does it go outside or into the attic?
You may also need a larger fan due to the use. You also need to leave it on for at least 30 minutes per person, It takes a while to get rid of the moisture.

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Rustedbird

The more CFM the fan is rated at, the more moisture will move out. Also, is there enough fresh air coming into the bathroom? How much gap under the door, or do you have a vent?

What kind of showers are taken? Navy showers or tropic downpour? My showerhead only has a rating of 2.5 GPM and it has a bypass valve to shut off the water between getting wet and rinsing off. Hot water costs money.

Also, how much insulation above the ceiling?

jdougn

Hey Mayhem,

Almost every mold situation I've ever seen has been caused by cold air coming in contact with a warm/humid surface. Whether this was in a one story, or two story house between floors, it has always come down to a lack of insulation, or a large air leak coming from the outside.

Other than that, the suggestions already given should help out.
hth, Doug

soltvedt

It's that time a year again when the temps drop and the bathroom fan drips.

My wife and I like to take 10min+ showers each, we like em HOT, and we have removed the low-flow gasket from the shower head.

Here is a video of our bathroom:

Here is an embeded video if it works:
Any initial advice before I get into the attic?

soltvedt

The last reply I posted never appeared, this is a test.

soltvedt

Here is my issue:

Any suggestions before I climb into the attic?

soltvedt

Huh, I tried again, and I noticed that is says that: "Your post will not be visible until a moderator has approved it for posting."

I think it is because I have a YouTube video embeded in to the post. I will now remove the embeded code and post again.

Sorry!

soltvedt

Any suggestions to my moisture problem before I climb into the attic:

kok328

I have the identical problem. My bathroom on an exterior wall. Fan is working fine and exhausts to the outdoors. I've concluded that the cause may be an insulation deficiency in the attic over the bathroom, shower curtain is hung too high and forcing the air to ceiling level before being exhausted and I probably didn't use mildew resistant bathroom paint, I just used regular flat, latex, ceiling paint. Mostly though, I'm too damn cheap to turn the heat up to keep the moisture from condensating. I really don't want to go into the attic because of all that shredded pink fiberglass insulation - I hate that stuff.