November Newsletter from Rapid RH

Vapor Barriers: Nuisance or Necessity?
Wagner would like to thank Peter Craig for giving us access to this article.

The subject of vapor barriers or retarders beneath concrete slabs on grade has long been controversial. Some justifiably argue that slabs placed in direct contact with a vapor barrier or retarder are more susceptible to curling and other slab problems than those cast on a granular base. They consider a vapor barrier or retarder a downright nuisance.
Others have experienced or witnessed the devastating effect of moisture on modern floor coverings, adhesives, coatings, and a building’s environment. They will justifiably argue that a vapor barrier or retarder beneath the slab...
Read Entire Article

Going to Surfaces 2012?
For free registration to surfaces, use code: BIEM. Register for complimentary Exhibit Hall Admission ($15 value) at www.surfaces.com. Register mulitipule associates with this prmotional code.

Going to World of Concrete 2012?
Registration for World of Concrete 2012 is officially open, and ICRI is pleased to offer you and your collegues FREE REGISTRATION to this huge event plus DISCOUNTS on seminars! You save up to $75 through ICRI.
Use Source Code: A36 to register at the following registration page: World of Concrete Online Registration

Forum Post: MMS- Are some unreliable with high RH?
Hi all. Apologies if this has been covered elsewhere-

We recently consulted on a timber flooring installation moisture-related failure, where a vapour barrier was applied.

The manufacturer subsequently changed their spec sheets to stipulate that, if the moisture content was above a certain level (yes, I said content, not RH- the standards here still make it optional to use either criteria), two coats of their barrier are required instead...Read the rest of the post and join the responses for this forum post >>

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Concrete Relative Humidity Manufacturer's Specifications

youtu.be/OTYbu0dtlRY

Free Webinar on
Measuring Moisture in
Concrete Slabs
December 6 at 1:00pm EDT with industry expert, Howard Kanare. Register Today

Where to find the  Rapid RH in 2012:

Domotex

Germany Jan 14-17

Booth: Hall 8 Stand C18

Surfaces

Las Vegas Jan 24-26

Booth: B3366

World of Concrete

Las Vegas, Jan 24-27

Booth: S12021

MFMA

Rancho Mirage, CA. Mar 1-2

Booth: 107

SPECS

Kissimmee, FL Mar 4-7