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Bathroom Moisture Issue!!

 
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Old 03-20-2015, 08:56 PM   #1
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Bathroom Moisture Issue!!


I recently had a client call me on a bathroom moisture problem..I revisited the site to unfortunately see a moisture buildup like I've never seen...condensation was literally running down the walls and ceiling!! Fan was sized accordingly to square footage and working from both ends??

Any advice??
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Old 03-20-2015, 09:08 PM   #2
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Re: Bathroom Moisture Issue!!


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I recently had a client call me on a bathroom moisture problem..I revisited the site to unfortunately see a moisture buildup like I've never seen...condensation was literally running down the walls and ceiling!! Fan was sized accordingly to square footage and working from both ends??

Any advice??
Not enough make up air for the fan to work effectively.

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Old 03-20-2015, 09:36 PM   #3
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Re: Bathroom Moisture Issue!!


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Originally Posted by EricBrancard View Post
Not enough make up air for the fan to work effectively.
Also, vent restricted or blocked.

I've also seen this from people swabbing the floor, shower, etc, and once from someone setting up drying racks for clothes....
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Old 03-20-2015, 09:39 PM   #4
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Re: Bathroom Moisture Issue!!


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Originally Posted by [email protected] View Post
I recently had a client call me on a bathroom moisture problem..I revisited the site to unfortunately see a moisture buildup like I've never seen...condensation was literally running down the walls and ceiling!! Fan was sized accordingly to square footage and working from both ends??

Any advice??
But is it sized for volume & conditions.

Plus what Eric said.
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Old 03-20-2015, 10:40 PM   #5
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Re: Bathroom Moisture Issue!!


In wintertime it happens in our one bathroom when my 6 year old takes a shower.
The exterior wall is rock-lathe plaster on furring strips over masonry block. No insulation.
There is a fan and it's sized accordingly and vented through the roof.
The exterior wall is cold and the warm moisture bath air condensates to where the moisture runs down the wall. Only happens to the exterior wall section.
The bath was remodeled when we bought the house. One thing I do notice there is very limited gap from the door bottom to the threshold.

I believe cutting the bottom of the door to increase the gap to about an 1" to get more make-up air should help.
It should be about the same concept of having supply ducts for HVAC in a room but the return in the hallway ceiling. Door bottoms are cut for air flow back to the return.
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Old 03-20-2015, 10:50 PM   #6
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Re: Bathroom Moisture Issue!!


This happens in every steam bath I've been in.
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Old 03-21-2015, 09:28 AM   #7
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Re: Bathroom Moisture Issue!!


I have plenty of make up air..and yes vented through the roof...I think I'm going to just put a really high cfm unit in and hope for the best...the picture window and skylight are probably not helping with this cold winter either!!

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