Concrete Sweating Profusely?

 
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Old 12-15-2011, 10:09 PM   #1
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Concrete Sweating Profusely?


Sigh, another problem... I noticed that my concrete floors have had occasional days where they sweat like crazy. Literally to the point where I walked into one of them and thought someone had just mopped the whole house. When I walked through with just socks on my feet felt very wet. We used 6mil visqueen in the foundation and the foundations are built with a slope away from the house. Anyone know of some possible remedies for this?
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Old 12-15-2011, 10:12 PM   #2
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Re: Concrete Sweating Profusely?


Sell

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Old 12-15-2011, 10:12 PM   #3
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Re: Concrete Sweating Profusely?


Or try a roll on vapor barrier.
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Old 12-15-2011, 10:14 PM   #4
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Re: Concrete Sweating Profusely?


Quote:
Originally Posted by ohiohomedoctor View Post
Sell
Matt I'm not pointing fingers.




To the OP try a dehumidifier.

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Old 12-15-2011, 10:15 PM   #5
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Re: Concrete Sweating Profusely?


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Matt I'm not pointing fingers.

To the OP try a dehumidifier.

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I dont it...
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Old 12-15-2011, 10:54 PM   #6
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Re: Concrete Sweating Profusely?


How long have the floors been down?
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Old 12-16-2011, 06:27 AM   #7
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Re: Concrete Sweating Profusely?


Have you seen this before?

http://www.youtube.com/watch?v=oz0__...ture=endscreen
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Old 12-16-2011, 08:14 AM   #8
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Re: Concrete Sweating Profusely?


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Sigh, another problem... I noticed that my concrete floors have had occasional days where they sweat like crazy. Literally to the point where I walked into one of them and thought someone had just mopped the whole house. When I walked through with just socks on my feet felt very wet. We used 6mil visqueen in the foundation and the foundations are built with a slope away from the house. Anyone know of some possible remedies for this?
From the 'occasional days' line it seems as if there are some days where there isn't a problem and other days where there is. If that's the case I'd start out by making a log and keeping track of the conditions when the heavy sweating is occurring, putting in data such as if it's raining, if sprinklers are going, the humidity, if the windows are closed, and anything else that might have an influence on the slab. This should give you a better idea of what might be causing the problem and once that's determined it's more likely to be able to be successfully corrected
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Old 12-16-2011, 09:38 AM   #9
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Re: Concrete Sweating Profusely?


the water can come from two places, above and below. If it's from above the fix is easy and it's easy to determine what the problem is. From above would be condensation on the cool slab resulting from moisture in the room air being above the dew point of the slab.

Get a hygrometer (humidity tester) and hang it on the wall in the house. These are cheap, you can find them on-line. Find yourself a chart that shows humidity levels at temperature. For example, 70% humidity at 70F air temp will condense on the floor (or walls) when they are 60F.

Assuming your humidity levels are to high, find the source and fix it, or get a dehumidifier. Oftentimes people disconnect the dryer vent in order to "Save" the warm humid air. That will result in condensation as will failing to vent the bathroom after a shower.
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Old 12-16-2011, 12:24 PM   #10
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Re: Concrete Sweating Profusely?


A method used by some is to tape down a piece of polythene tight to the floor and see whether the moisture is under or on top of it.
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Old 12-17-2011, 10:18 PM   #11
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Re: Concrete Sweating Profusely?


Wtf...lolololololololol
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Old 12-18-2011, 01:16 PM   #12
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Re: Concrete Sweating Profusely?


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A method used by some is to tape down a piece of polythene tight to the floor and see whether the moisture is under or on top of it.

Now there's the best start I've heard of yet.
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Old 12-18-2011, 01:36 PM   #13
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Re: Concrete Sweating Profusely?


Did you put a vapor barrier under the slab. You say you used 6mil visquen on the foundation. What exactly does that mean?
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Old 12-20-2011, 04:23 AM   #14
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Re: Concrete Sweating Profusely?


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Or try a roll on vapor barrier.
Do those work?
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Old 12-20-2011, 04:41 AM   #15
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Re: Concrete Sweating Profusely?


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Sigh, another problem... I noticed that my concrete floors have had occasional days where they sweat like crazy. Literally to the point where I walked into one of them and thought someone had just mopped the whole house. When I walked through with just socks on my feet felt very wet. We used 6mil visqueen in the foundation and the foundations are built with a slope away from the house. Anyone know of some possible remedies for this?
Hate to tell you this, but I think your concrete guy might not be installing the vapor barrier under the floor properly.

The remedy... rip it out.
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Old 12-20-2011, 10:02 AM   #16
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Re: Concrete Sweating Profusely?


wait wait wait....as has been pointed out this water is very likely condensation. I just got off of a pool deck on which water would condense every night and I couldn't actually get it dried out to work on it till about 2:00 in the afternoon. I'm just saying that this is a strong possibility and is very common.

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