Need a book? Engineering books recommendations...

Return to index: [Subject] [Thread] [Date] [Author]

Re: Vapor Barrier

[Subject Prev][Subject Next][Thread Prev][Thread Next]
Brian K. Smith wrote: 
>I personally like using the 3" barrier when possible; however, half the 
contractors call my office and tell me I have an error on my plans. < 
I agree - I generally specify the 3" of sand when using a vapor barrier but 
also generally am questioned why the sand is on top of the vapor barrier 
instead of below it.  When I say it is correct as shown, I'm told "I've
seen it done that way".  Perhaps if enough of us specify it, someday 
contractors will get used to seeing it.  
I don't always use a vapor barrier under slabs on grade - I use it when
are finishes which are sensitive to moisture or when a damp floor is 
undesirable, but I don't automatically use it under "all" slabs on grade.