MMS- Are some unreliable with high RH?

[Ernesto]

(11-10-2011 07:08 PM)CC Solutions Wrote:  

(11-10-2011 05:13 PM)Ernesto Wrote:  Or...or and or. But what if I test and my readings are under the prescribed limit?

If your readings are under the manufacturer's upper limit and you meet all the rest of the requirements, you will have a warranty. Other requirements are a functioning and proper vapor retarder and a porous surface that has a profile to it, as Bostik says, 'not smooth but like a broom finish', as well as many other requirements.

If you miss just one required parameter the manufacturer has a way out, and for good reason! They know the floor moisture could skyrocket with no vapor retarder.

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(11-10-2011 05:13 PM)Ernesto Wrote:  Hey, here is one of the leading underlayments for the industry as far as floating laminate and hardwood floors go. They claim it is 700 + percent more effective that other underlayments as far as moisture concerns go. See what test they require. Check it out;

http://www.floormuffler.com/ultraseal/in...tions.html

How is this a good vapor mitigation system? The instructions are " If installing over concrete, the concrete must be dry with moisture emission rates that do not exceed 3 lbs. per 1000 square feet per 24 hours as measured by the Anhydrous Calcium Chloride Test."

Sounds like it has to be dry before you even start!

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(11-10-2011 05:16 PM)eaadams Wrote:  Saw an add in Floor Covering Installer this month (came today) for Halex's Versashild and it claims to go to 95% RH. Going to circle that for info....

There are hundreds of products that claim to 'go to 95%' or more. Why not stick with the three or four that actually work?

The way I read the Bostik requirements is that I only have to make one of them, not all of them.

As far as the floormuffler goes, welcome to my world. The way I see it, my options are...1) call their bluff and do a CaCl test with documentation, 2) just install the 1,100 sf of laminate and call it a day, or 3) throw some six mil under it...which I often do.