Colin Gilboy
Senior Member
Username: colin
Post Number: 217
Registered: 09-2005
| | Posted on Tuesday, January 26, 2010 - 08:47 am: |    |
The Where, When, and Why of Slab on Grade Vapor Retarders
http://www.conspectusinc.com/downloads/Documents/publications-download-TT-A4090.htm
Many use the terms vapor retarder (VR) and vapor barrier (VB) interchangeably. However, there is a difference. A vapor retarder RETARDS or slows (but does not prevent) the transmission of water vapor. A vapor barrier BLOCKS the transmission of water vapor.
Colin Gilboy
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