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Posted on 2/13/18 at 7:30 pm to AlxTgr
Alx, one of the biggest parts of my occupation is combatting and controlling moisture in concrete. I haven’t read anything you’ve googled. But if what it says is that moisture does not or can not come from underneath a concrete slab I can tell you that it is flat out wrong. And I can take you to places and show you. And buy you a beer in the process. shite condensates and sweats this time of year and nothing a vapor barrier can do will stop it. But saying vapor barriers don’t work is delusional. There is a reason why they are put down every day. I still don’t know what point your trying to make. I’ll again back out of the thread. 
Posted on 2/13/18 at 7:38 pm to LSUballs
Balls, these discussions are about carports. Carports in the humid south in winter.
quote:This is the entire point, dude. shite frick piss shite!
shite condensates and sweats this time of year and nothing a vapor barrier can do will stop it.
quote:Damn man. That's just shitty. No other way to put it. You're behavior on this is an embarrassment. Here's another LINK yo really should read.
I haven’t read anything you’ve googled.
quote:I don't believe you. I believe you realized you're wrong about something you believed your whole life, and you just can't deal with it.
I still don’t know what point your trying to make. I’ll again back out of the thread.
Posted on 2/13/18 at 7:57 pm to AlxTgr
quote:. Then why do the words vapor barrier keep getting mentioned?
shite condensates and sweats this time of year and nothing a vapor barrier can do will stop it
Posted on 2/13/18 at 9:22 pm to tigerfoot
I thought the visqueen was out under the concrete to keep it from drying out too fast. We always put it under to keep moisture in the concrete vs migrating to the sand underneath.
As for vapor barriers, that goes on top before flooring.
As for vapor barriers, that goes on top before flooring.
Posted on 2/13/18 at 9:38 pm to AlxTgr
Let me help you out, goodness people.
Vapor barriers are there to prevent moisture from the bottom to the top. It's biggest use is for HVAC'd areas, so moisture doesn't come through the concrete to your flooring.
Carports and outside cement sweats from the top mostly. The ground is colder then the air so the concrete on the ground sucks the moisture out of the air, it's like grass dewing in the morning. If you put something over the grass, that's going to dew also.
Vapor barriers are there to prevent moisture from the bottom to the top. It's biggest use is for HVAC'd areas, so moisture doesn't come through the concrete to your flooring.
Carports and outside cement sweats from the top mostly. The ground is colder then the air so the concrete on the ground sucks the moisture out of the air, it's like grass dewing in the morning. If you put something over the grass, that's going to dew also.
Posted on 2/13/18 at 9:57 pm to baldona
Posted on 2/14/18 at 2:33 am to LSUballs
quote:
you’re a riot. Why do they put visqueen under concrete?
To prevent migration of moisture from the ground into the slab which can cause surface moisture to appear on the slab during the dozen or so days a year in south Louisiana when the temperature of the slab is above the dew point of the ambient air and the relative humidity is below 40%. The rest of the year surface moisture on a slab is the result of the condensation that occurs when the slab's temperature is below the dew point of the moisture laden air.
Posted on 2/14/18 at 9:26 am to LSURoss
I believe you need to enclose it and run air. My mothers carport sweats like me mowing grass on a summers day.
Posted on 2/14/18 at 9:31 am to VernonPLSUfan
Steam trace through the slab is the answer. Or just circulate hot water through it. Only a couple hundred extra dollars of copper pipe when you build the house. Set it up to recirc back to the heater to save some $. Bonus is that your slab will be warm in the winter so yay for walking on the carport with no shoes on to get the paper.
Makes perfect sense.
Makes perfect sense.
Posted on 2/14/18 at 9:53 am to DownshiftAndFloorIt
or you can install a fan to move the air in the area.
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