prevention and remediation of concrete moisture-caused flooring issues prevention and remediation of...
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Prevention and Remediation Prevention and Remediation of Concrete Moisture-Caused of Concrete Moisture-Caused Flooring IssuesFlooring Issues
NameTandus Flooring
Date
Course ObjectivesCourse Objectives
You will learn…What floor moisture is and where it comes fromHow floor moisture affects floor coverings and
adhesivesThe importance of identifying floor moisture
issues prior to floor covering installationHow to accurately test for floor moisture Moisture testing minimumsRequirements for Moisture Vapor Emissions
Rate, pH and Relative Humidity Information on approved remediation systems
Floor moisture issues have become more frequent and difficult to identify. All floor covering manufacturers and adhesive companies have seen a tremendous increase in the number of moisture related issues.
Factors include:Changes in concrete composition High recycle content concrete The variety of curing & sealing compounds commonly used Different surfacing techniques Fast track construction schedules The practice of not running HVAC systems to help acclimate concrete prior to testing and/or the use of new hybrid ventilation systems.
How Does Floor Moisture Affect How Does Floor Moisture Affect Floor Coverings & Adhesives?Floor Coverings & Adhesives?
DebondingAdhesive failureTile instability Bubbles in VCTT (Powerbond)or
broadloomGood medium for biological growth
If moisture issues are identified before the floor covering is installed,
corrective measures are much simpler and less expensive than
after the floor covering is in place
Mold colonization due to moisture in slab
Degraded adhesive due to moisture in slab
Curling tile that was installed in entry area
over an 8lb slab
How to Measure Concrete Floor How to Measure Concrete Floor MoistureMoistureCaCl (Anhydrous Calcium Chloride) ASTM F-1869-04RH (In-situ) ASTM F-2170-02pH (Alkalinity) ASTM F-710-05
Anhydrous Calcium Chloride Testing Anhydrous Calcium Chloride Testing ASTM F1869-04ASTM F1869-04What are we measuring? MVERInaccurate or inconsistent resultsTypical industry requirements
pH pH ASTM Standard Practice F-710-05ASTM Standard Practice F-710-05
What are we measuring?
Inaccurate or inconsistent results
Typical industry requirements
Relative Humidity (RH) Relative Humidity (RH) ASTM F2170-02ASTM F2170-02
What are we measuring?Inaccurate or inconsistent results Typical industry requirements
3 three moisture tests to be completed within the first 1000 sq ft of concrete on each floor
One moisture test to be completed within each additional 1000 sq ft
MVER Testing ASTM F-1869-1050% of these tests be conducted
RH Testing ASTM F-2170 -1050% of the tests to be conducted
pH Testing ASTM F-710-10.Surface pH of the concrete flooring substrate
must be between 7 and 9 and absolutely must not exceed 9.
A minimum of one test per 1000 sq ft is required.
TESTING REQUIREMENTS FOR TESTING REQUIREMENTS FOR POWERBOND, MODULAR AND POWERBOND, MODULAR AND
BROADLOOMBROADLOOM
It is the General Contractor’s and/or Architect’s responsibility to specify
a concrete substrate that is suitable for the installation of a
floor covering product at the desired time of installation.
“It is solely the responsibility of the installation contractor to insure
that the sub-floor is properly prepared prior to installation.”
Tandus Flooring Installation Instructions
Approved Remediation SystemsApproved Remediation Systems
Underlayment for use with Tandus Flooring’s modular carpet
Remediate MVER up to 10 lbs.pH requirements maximum 9Closed-cell cushion; based on the technology
of PowerbondBoth Tandus Flooring’s modular carpet and
power(shield) warrantied when used together.
Approved Remediation SystemsApproved Remediation Systems
XL Brands DynaMix
Green concrete only, <8 lbs MVER with decreasing trend
pH requirements maximum 9
Warranty is limited to 3 years
Cost = $0.27 per sf
Approved Remediation SystemsApproved Remediation Systems
VersaShield Green concrete or existing
moisture source <12 lbs MVER
pH requirements maximum 12
RH requirements maximum 95%
Warranty covers warranty period
of product type selected
Cost = $0.65 sf - $0.90 sf
Approved Remediation SystemsApproved Remediation Systems
Koester
Green concrete or existing moisture source <25 lbs MVER
pH requirements maximum 14
Warranty is lifetime of the
flooring product
Cost = 7.50 sf - $9.50 sf
Approved Remediation SystemsApproved Remediation Systems
2 Part Epoxy Systems
• Ardex MCI
• Bostik D261
• Key Resin MTV 635
• Mapei EMB
Refer to Field Technical Services for Moisture pH, MVER and RH
limits for these products as well as availability and pricing.
Important Things to Important Things to RememberRememberDo not assume that proper testing
has been performed by general contractor or end user.
Be knowledgeable and ask questions prior to installation.
Avoiding required testing is not an option.
“We’re fully aware that these recommendations go well beyond what is presently being done or required on
most projects. Given the very common, serious, and costly nature of flooring failures, however, it’s believed that these measures are necessary to reduce the risk of flooring problems and the significant cost associated with failure of the flooring system.”
Reference from: “Moisture Testing of Concrete Slabs, When 3lbs is not 3lbs”
Conclusion…You should Conclusion…You should knowknow What floor moisture is and where it comes
from How floor moisture affects floor coverings
and adhesives The importance of identifying floor moisture
issues prior to floor covering installation How to accurately test for floor moisture Moisture testing minimums Requirements for MVER, pH and RH Information on approved remediation
systems