I live in South Louisiana where it is very humid. I intend to pour a slab
of concrete 20' x 24' for a shop that I might eventually have air
Should I apply a layer of plastic under the poured concrete to avoid
sweating of the floor ??
This is the dumbest thing I ever heard. Some people in this modern
world seem to think everything in the world needs to be sealed in
plastic. What about the natural moisture in concrete, how is it
supposed to escape? Concrete needs to breathe.
All you will be doing is sealing all the moisture into the concrete
and if it freezes in winter, it will cause the surface to freeze and
By the way, Visqueen the queen of the Vis people? Who's the king?
look into 6" crushed stone under slab and vapor barrier as a capillary
break. Stone will not allow ground water to rise against the bottom of
1) Hot mopped tar paper, usually 2 layers.
2) Heavy mil polyethylene sheeting , see:
http://www.americover.com/vaporblock.htm for an example.
Keep the whole world singing. . .
(remove the 7)
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