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moisture meter
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12-05-2010, 08:04 PM #21
sbhtennis Newbie *
Status: Offline Posts:11 Threads:1 Joined:Oct 2010
I do have large humidity swings in the house... now 48% but in September it was 65% (when things swelled) . I have forced air electric..new furnace and heat pump, although did not use air conditioner much in summer (when it was the most humid).
If reinstalling bamboo how much would you allow for expansion at walls etc.
Would putting poly 6 mil plastic in addition to Aquabar set up a moist environment underneath??

12-05-2010, 09:59 PM #22
CC Solutions Concrete Moisture Evangelist *******
Status: Offline Posts:1,065 Threads:69 Joined:Dec 2009
I'm not a wood floor expert, but I do know hardwoods such as maple, hickory and oak are dried to between 4 and 18 percent moisture (depending on species) before installation. I suspect bamboo is very dry also. I know in my own home I watch humidity levels closely and see my hickory floors expand and contract quite a bit. Perhaps this is what is happening.

JD Grafton
Concrete Answers for Flooring Problems
JGrafton@ccsolves.com

12-07-2010, 07:48 PM #23
Ernesto Concrete Moisture Expert *****
Status: Offline Posts:606 Threads:33 Joined:Sep 2009
Not sure why your so hung up on the aquabar B stuff if it failed you the first time. Why doncha call them up and ask them to replace your old floor for free. If they were so hot they would pony up the bucks. Tongue LOL

Or call your bamboo manufacturer and ask them.

BTW- 4% MVER is above all hardwood manufacturers limit. The industry standard for MVER and hardwood is 3lbs in 24hrs over 1000sf with a CaCl test.

Bamboo needs a stable environment. If you have huge swings in rh you should pick a different floor.

Most all hardwood and grass, is milled at a 6 to 9% MC. But ask them to prove it. Ha ha

Stephen Perrera dba
Top Floor Installation Co.
http://www.tucsonazflooring.com
http://www.floorsavior.com

12-07-2010, 10:39 PM #24
sbhtennis Newbie *
Status: Offline Posts:11 Threads:1 Joined:Oct 2010
thanks for info.. Just did 3 more CACL tests per ASTM guidelines... Results are 2.15% 3.52% and 3.74%.. THe original install may have not left enough expansion gap is current thinking.
thanks for info.. Just did 3 more CACL tests per ASTM guidelines... Results are 2.15% 3.52% and 3.74%.. THe original install may have not left enough expansion gap is current thinking.

12-07-2010, 10:58 PM #25
CC Solutions Concrete Moisture Evangelist *******
Status: Offline Posts:1,065 Threads:69 Joined:Dec 2009
Those are excellent readings sbh....

JD Grafton
Concrete Answers for Flooring Problems
JGrafton@ccsolves.com

12-08-2010, 10:00 PM #26
sbhtennis Newbie *
Status: Offline Posts:11 Threads:1 Joined:Oct 2010
Ok any advice as far as reinstall?? How much expansion gap at the wall? Anything special for vapor barrier on concrete ..(currently Aquabar B) . Anyway to control the higher humidity in the summer? Should we use a 1/4 round molding in addition to the basic trim molding? (that way can leave more expansion) . Installer thinks we should allow for more float by leaving an expansion gap at kitchen island and cabinets. (They sit on TOP of the bamboo)

12-10-2010, 07:26 AM #27
Ernesto Concrete Moisture Expert *****
Status: Offline Posts:606 Threads:33 Joined:Sep 2009
I like Sound Solutions with vapor block; http://www.healthierchoice.com/productsSoundSolution.aspx

Lots of people like Floor Muffler with vapor block. I use six mil under the Floor Muffller for added protection.

Your readings are great, but it's not the lack of expansion space, it's the fact that Aquabar B is not supposed to be used directly over concrete. Any hardwood, bamboo, laminate, floating cork floor would do the same thing because..........read this paragraph again and repeat.

Stephen Perrera dba
Top Floor Installation Co.
http://www.tucsonazflooring.com
http://www.floorsavior.com

12-10-2010, 07:33 AM #28
sbhtennis Newbie *
Status: Offline Posts:11 Threads:1 Joined:Oct 2010
Thanks.. have forwarded to the store owner..(and my architect who is acting as my advocate) ...

Selah4Makens Show this Post
12-10-2010, 11:09 PM #29
Selah4Makens Unregistered
 
The Concrete Encounter is a hand-held electronic moisture meter that utilizes non-destructive impedance measurement for moisture determination. Parallel co-planer electrodes are mounted on the unit's base which transmit low-frequency signals into the concrete... The results give the average moisture content to a depth of 2-6 inches during the drying period.

12-11-2010, 07:49 AM #30
Ernesto Concrete Moisture Expert *****
Status: Offline Posts:606 Threads:33 Joined:Sep 2009
Two to six inches? I can't find that in any literature anywhere. I have heard it is only one inch below the surface. This is a qualitative test method not a quantitative test.

Stephen Perrera dba
Top Floor Installation Co.
http://www.tucsonazflooring.com
http://www.floorsavior.com








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