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Convert from lbs.per 24 hours to RH%
12-16-2009, 11:51 AM
Post: #3
RE: Convert from lbs.per 24 hours to RH%
There is no correlation between RH and emission.

I can create a slab with a 2lb MVER and 98% RH, and I can create a slab with 8lbs MVER and 50% RH. And believe me, I've seen both of these extremes and repaired both of them!

The MVER is readily affected by external conditions. Think of a drywaller spilling water on the floor of a very dry old slab. MVER will shoot through the roof, while RH will be unaffected.

Now consider a slab with a blotter under it, or no vapor retarder. It may show great MVER, especially if it is unfinished in a dry building, yet the RH could be 90% or more. If you put a moisture sensitive floor over this slab, you will have problems even though you had great CaCl tests.

JD Grafton
Concrete Answers for Flooring Problems
[email protected]
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Messages In This Thread
Convert from lbs.per 24 hours to RH% - CFI - 12-06-2009, 03:00 PM
RE: Convert from lbs.per 24 hours to RH% - CC Solutions - 12-16-2009 11:51 AM