The industry is rapidly changing to using RH (in-situ) probes for testing for moisture in the slab. Photo of Rapid RH 4.0 product courtesy of Wagner Electronics.




Q: What is the percent of RH vs. Calcium Chloride testing being done? (Al Ellis, Alpha Professional Tools)

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Q: When testing for RH, what is the purpose of the interior slab temperature, and does that have any relation to the slab’s fitness for floor coverings? (Kent Edel, Certified Carpet & Surfaces Inspection Co., Baltimore)

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Q: How soon can you seal a concrete floor after it has been poured and is there a standard cure time before doing this? (Veronica Love, Vandams Abbey Carpet and Floor, Marysville, Wash.)

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Q: Will muriatic acid remove curing compounds on smaller tile projects? (Brad Bjorklund, Huscraft LLC, Bellevue, Wash.)

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Q: Will the use of gas heat rather than A/C to bring down the concrete moisture be harmful to the slab [with ventilation]? (Paul Styka, AFS, Naperville, Ill.)

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Q: How do moisture and alkalinity each contribute to adhesives failure? (Aaron Abbott, Laticrete)

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Q: If the adhesive darkens when checking under flooring, what does it tell you? (Terry Price, NM Flooring Inspection and Consulting Service, Albuquerque)

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Q: What is the solution for installing flooring over control joints? (Edward Dueppen, BLDD Architects, Inc., Champaign, Ill.)

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Q: Will shot blasting help remove the curing layer and improve the performance of adhesives? (Brian Mackenzie, Samling Global, Greer, SC)

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Q: What is your opinion about European Carbide Method (CM) for moisture measurement? Is it more accurate than the electronic one? (Gleb Gavrylov, Tarkett)

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Q: Where does the moisture go when caught between the vapor retarder and the floor covering or mitigation process? (Kent Edel, Certified Carpet & Surfaces Inspection Co., Baltimore)

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Q: What are the drawbacks of Calcium Chloride tests compared to R.H. tests? Are adhesive manufacturers revising warranties to reflect a preferred method? (Sonny Webster, All Surfaces, Houston)

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Q: What are the concerns with concrete sealers and floor leveling products when a cementitious floor leveling material is used? (Corey Zussman, Berglund Construction, Chicago)

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Q: Is there anything the industry can do to better educate architects and contractors or to hold curing agent salespeople accountable for the presence of curing agents at the time of installation? (Coleen Heslin, Morales Group, Inver Grove Heights, Minn.)

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Q: How does the type of aggregate affect the flooring installation? (Nate Hall, The Enchanted Floorist, LLC, Grafton, Wis.)

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Q: Why do so many installers refuse to perform moisture tests? (Phil Meyer, Carpet One, Concord, Calif.)

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