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Patio concrete sweating

Posted on 2/13/18 at 6:18 pm
Posted by LSURoss
SWLAish
Member since Dec 2007
15430 posts
Posted on 2/13/18 at 6:18 pm
Our patio has always "sweated" and this spring I am finally going to try and fix it.

Does anyone have any recommendations on products, procedures, tips or tricks?

Seems like everything I Google is just a particular brands blog post about why their product is best.

TIA
Posted by QuietTiger
New Orleans
Member since Dec 2003
26256 posts
Posted on 2/13/18 at 6:21 pm to
Next page down, no visqueen?
Posted by WPsportsman
In a van down by the river
Member since Jun 2015
2408 posts
Posted on 2/13/18 at 6:21 pm to
Good luck this is Louisiana. Just watched the weather and looks like sweating weather for a while
Posted by AlxTgr
Kyre Banorg
Member since Oct 2003
81761 posts
Posted on 2/13/18 at 6:25 pm to
Posted by LSURoss
SWLAish
Member since Dec 2007
15430 posts
Posted on 2/13/18 at 6:32 pm to
Jesus, I didn't see that other cluster frick of a thread until just now.

Posted by DownshiftAndFloorIt
Here
Member since Jan 2011
66763 posts
Posted on 2/13/18 at 6:42 pm to
Run a steam trace through the slab to keep it warm
Posted by LSUballs
RayVegas LA
Member since Feb 2008
37854 posts
Posted on 2/13/18 at 6:54 pm to
2 rules of concrete in the south: It’s going to crack and it’s going to sweat. Not much you can do about the sweating other than provide a vapor barrier under the slab (which any contractor who knows anything would have already done) or move your slab to Montana. There are also surface epoxys and coating you can try to stifle the sweating. But that’s about it. Pay no attention to others who may pop in here with differing opinions. For they are grossly ignorant on the subject.
Posted by LSURoss
SWLAish
Member since Dec 2007
15430 posts
Posted on 2/13/18 at 6:57 pm to
Thanks. The house as built in 71 and I have no idea if it has a vapor barrier. There are a range of products out there that Rande from $20/gal to $90/gal.

This all started when my wife said she wants to paint the patio.

Home ownership!!
Posted by RichJ
The Land of the CoonAss
Member since Nov 2016
3170 posts
Posted on 2/13/18 at 7:03 pm to
quote:

This all started when my wife said she wants to paint the patio.


Absolutely not!! You will be painting again, and again, and again! Tear it out, put in colored concrete. Will cost more, but you will enjoy the results.
Posted by tigerfoot
Alexandria
Member since Sep 2006
56533 posts
Posted on 2/13/18 at 7:05 pm to
quote:

Not much you can do about the sweating other than provide a vapor barrier under the slab (which any contractor who knows anything would have already done) or move your slab to Montana.
im glad we have established that a vapor barrier doesn’t stop the concrete from former no condensation
Posted by LSUballs
RayVegas LA
Member since Feb 2008
37854 posts
Posted on 2/13/18 at 7:07 pm to
When was that not established?
Posted by AlxTgr
Kyre Banorg
Member since Oct 2003
81761 posts
Posted on 2/13/18 at 7:09 pm to
quote:

Not much you can do about the sweating other than provide a vapor barrier under the slab (which any contractor who knows anything would have already done)
Dude, just stop. You're not too old to learn something.
Posted by AlxTgr
Kyre Banorg
Member since Oct 2003
81761 posts
Posted on 2/13/18 at 7:11 pm to
quote:

When was that not established?
I've never seen such a willful display of ignorance, and I read The Rant.
Posted by tigerfoot
Alexandria
Member since Sep 2006
56533 posts
Posted on 2/13/18 at 7:13 pm to
Must’ve been Otis. I get y’all confused

Carry on
Posted by LSUballs
RayVegas LA
Member since Feb 2008
37854 posts
Posted on 2/13/18 at 7:13 pm to
you’re a riot. Why do they put visqueen under concrete?
Posted by LSURoss
SWLAish
Member since Dec 2007
15430 posts
Posted on 2/13/18 at 7:13 pm to
So no one has any recs on a sealer? Just arguments about vapor barriers?
Posted by AlxTgr
Kyre Banorg
Member since Oct 2003
81761 posts
Posted on 2/13/18 at 7:14 pm to
quote:

Otis
Food myth guy, not concrete myth guy.
Posted by Chad504boy
4 posts
Member since Feb 2005
166655 posts
Posted on 2/13/18 at 7:16 pm to
Everybody put a bucket on concrete
Posted by AlxTgr
Kyre Banorg
Member since Oct 2003
81761 posts
Posted on 2/13/18 at 7:20 pm to
quote:

you’re a riot. Why do they put visqueen under concrete?
To prevent moisture movement through concrete from down to up. This is important when flooring is applied. It's as if you didn't even read the other thread. Do you still not understand condensation?
Posted by tigerfoot
Alexandria
Member since Sep 2006
56533 posts
Posted on 2/13/18 at 7:20 pm to
quote:

one has any recs on a sealer? Just arguments about vapor barriers?
then the condensation would form on the sealer.

The moisture is coming from the top not the bottom

On a slippery scale it would be somewhere between otter snot and that shite Chevy Chase sprayed on his sled if you put a coating on it
This post was edited on 2/13/18 at 7:24 pm
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