Page 3 - 2018-01-CFR Volume 112 - So You Don't Think You Need An Under Slab Vapor Retarder In The Desert - January 2018
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In arid regions of the country, rising water vapor
evaporates so quickly into the dry air above the earth
that one can easily be convinced that moisture will
not be a problem to a structure built in such a climate
and over a water table that sits well below the sur-
face of the earth. However, once a concrete slab is
placed on the ground, the free evaporation of rising
water vapor is restricted. Gradually, the relative hu-
midity in the soil structure directly below the slab will
increase and reach 100% as believed by the Building
Research Advisory Board and as confirmed by nu-
merous in-situ studies by respected consultants and
forensic engineering firms around the country.
© 2018 Stego Industries, LLC. All Rights Reserved January 2018
No problems with moisture in the desert? Please
think again. In the past several years, I have investi-
gated or been made aware of over a half-dozen seri-
ous moisture-related flooring issues in the Phoenix
area alone.
3 Commercial Flooring Report
