Garage slab with no vapor barrier

jamesbodellMay 27, 2011

Everything I read says you should always put a vapor barrier/retarder under a slab on grade. Whats the harm?

My contractor is arguing the point. He thinks the slab will "float" or that the trapped water will be bad. I disagree, but how hard should I fight it?

Its a slab on grade for the garage, living space above that. I may just put 6 mil down myself this weekedn in prep or the pour.

Thank you for reporting this comment. Undo

Not needed if the space above the slab is unconditioned and you do not care about moisture levels.

Sidewalks are directly on grade with no barrier.

I would put down the barrier to make the garage dryer and more comfortable.

    Bookmark   May 27, 2011 at 3:50PM
Thank you for reporting this comment. Undo

The contractor just doesn't want to have to remove excessive bleed water. Use a stiff, low water mix.

    Bookmark   May 27, 2011 at 6:18PM
Sign Up to comment
More Discussions
Craftsman Garage Door opener won't close
Hello, Wife came home today and was able to open garage...
2x8 Joists are 1.75x7.75 and 2x6 Joists are 1.75x5.75? why is this?
I know that lumber is smaller than actually stated...
Curtain Rods
Hi, I am not sure where to post this so my apologies...
Help with rough, ugly laminate counter edges
Hello, we recently put in new laminate countertops...
Elizabeth Loparco
Asbestos in Popcorn Ceiling/ worried sick
Hi. My house was built in the late 60s and I recently...
© 2015 Houzz Inc. Houzz® The new way to design your home™