(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.
(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;
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!
(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?
Concrete Answers for Flooring Problems