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High Rapid RH readings??
11-16-2011, 11:04 AM
Post: #31
RE: High Rapid RH readings??
Well ddemento, you are doing work that is out of my area of expertise. That doesn't mean I can't advise using my background and common sense gained from dealing with these issues for a long time though.

Warning: There are some people involved with projects that cut corners or just don't understand what long term flooring success requires. These people will not be around when the floor fails, or will claim some type of voodoo occurred and that is why you now have a ruined floor.

When I looked at the floor manufacturer's website I saw they require 75% RH for commercial glue-down installations. I saw no reference to your application directly. I would advise that you call the manufacturer and explain the details of what you have. Explain your concerns. Get their advice and get it in writing.

Stick with accepted concrete testing methods as dictated by the flooring manufacturer. Nucleo readings will not be recognized.

Be sure any testing using CaCl is done according to the latest ASTM which will involve grinding pretty deep into the concrete surface. This will increase the MVER reading.

Trust your RH readings! The floor is wet internally. You need to decide if all that moisture will ever have an effect on the flooring. If you put a vapor retarder between the concrete and the wood it will help, and it may be an acceptable way to proceed. Ask the manufacturer for their recommendation. They had something on their website about gluing down inexpensive sheet vinyl first, but I'm sure there are many ways to accomplish a good vapor retarder. If you are laying a wood sleeper system over the concrete I would think a sheet vapor retarder will be fast, inexpensive and completely serviceable.

JD Grafton
Concrete Answers for Flooring Problems
[email protected]
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Messages In This Thread
High Rapid RH readings?? - ddemento - 11-03-2011, 12:13 PM
RE: High Rapid RH readings?? - eaadams - 11-03-2011, 12:33 PM
RE: High Rapid RH readings?? - ddemento - 11-07-2011, 12:58 PM
RE: High Rapid RH readings?? - eaadams - 11-07-2011, 01:20 PM
RE: High Rapid RH readings?? - eaadams - 11-07-2011, 01:52 PM
RE: High Rapid RH readings?? - Ernesto - 11-07-2011, 07:27 PM
RE: High Rapid RH readings?? - eaadams - 11-07-2011, 08:33 PM
RE: High Rapid RH readings?? - eaadams - 11-08-2011, 09:38 AM
RE: High Rapid RH readings?? - eaadams - 11-08-2011, 10:11 AM
RE: High Rapid RH readings?? - ddemento - 11-09-2011, 05:00 AM
RE: High Rapid RH readings?? - eaadams - 11-09-2011, 08:20 PM
RE: High Rapid RH readings?? - ddemento - 11-11-2011, 11:07 AM
RE: High Rapid RH readings?? - eaadams - 11-11-2011, 11:23 AM
RE: High Rapid RH readings?? - Ernesto - 11-11-2011, 04:36 PM
RE: High Rapid RH readings?? - eaadams - 11-11-2011, 08:49 PM
RE: High Rapid RH readings?? - Ernesto - 11-12-2011, 05:07 PM
RE: High Rapid RH readings?? - Ernesto - 11-12-2011, 05:45 PM
RE: High Rapid RH readings?? - ddemento - 11-16-2011, 10:05 AM
RE: High Rapid RH readings?? - eaadams - 11-16-2011, 10:50 AM
RE: High Rapid RH readings?? - CC Solutions - 11-16-2011 11:04 AM
RE: High Rapid RH readings?? - eaadams - 11-16-2011, 11:32 AM
RE: High Rapid RH readings?? - ddemento - 11-16-2011, 01:25 PM
RE: High Rapid RH readings?? - Rubensgt40 - 11-16-2011, 03:34 PM
RE: High Rapid RH readings?? - eaadams - 11-16-2011, 04:28 PM
RE: High Rapid RH readings?? - Ernesto - 11-16-2011, 05:03 PM
RE: High Rapid RH readings?? - eaadams - 11-16-2011, 06:21 PM
RE: High Rapid RH readings?? - Ernesto - 11-16-2011, 06:43 PM
RE: High Rapid RH readings?? - ddemento - 11-17-2011, 06:16 AM
RE: High Rapid RH readings?? - eaadams - 11-17-2011, 10:13 AM
RE: High Rapid RH readings?? - Ernesto - 11-17-2011, 04:58 PM
RE: High Rapid RH readings?? - ddemento - 12-08-2011, 12:03 PM
RE: High Rapid RH readings?? - Ernesto - 12-08-2011, 12:48 PM
RE: High Rapid RH readings?? - eaadams - 12-08-2011, 05:55 PM
RE: High Rapid RH readings?? - Ernesto - 12-08-2011, 06:03 PM