CONCRETE MOISTURE MITIGATING PRODUCT USAGE...CONCRETE MOISTURE MITIGATING PRODUCT USAGE Presented by: Pape Fall and Jeff Keenan Hoar Construction, LLC and Kitchell Corporation ACIG

CONCRETE MOISTUREMITIGATING PRODUCT USAGE

Presented by: Pape Fall and Jeff KeenanHoar Construction, LLC and Kitchell Corporation

ACIG Quality Summit 2016

Copyright © 2016 American Contractors Insurance Group

COMPLIANCE to COMMITMENTClaims • Risk Management • Safety • Quality

TYPES OF CONCRETE MOISTURE MITIGATION

1. Admixture to concrete at the batch plant.

• Manufacturers require a rep to observe the addition of product – many times hard to schedule.

2. Topical application (spray on PCCT) after concrete is placed.

• Need to monitor coverage rates to make sure manufacturer requirements are met.

3. High moisture adhesive pre‐applied to flooring offsite.

4. High moisture content adhesive from flooring manufacturer – up to 85% RH.

5. Full moisture mitigation system of epoxy resin based product and cementitious leveling compound.



PENETRATING COLLOIDAL CONCRETE TREATMENT

• PCCT : spray on products used to control water vapor emissions control

• How They Work…

…Eliminate the route of moisture vapor emission through the slab by restricting the integral capillary system…



PCCT ASSERTIONS

• …Removes the necessity for field moisture testing, expensive topical remediation systems, and endemic project delays due to the inability to install flooring on schedule…

• …Proprietary formula reacts within the concrete creating a more resilient, workable surface…

• …Spray‐applied concrete treatments that penetrate into concrete capillaries and pores to waterproof and protect the entire capillary and pore structure…



WARRANTIES BY PCCT MANUFACTURERS

• …offers a 15‐year warranty against failure due to negative‐side moisture vapor migration or moisture‐born alkalinity…

• …comes with a Full System 15 year warranty on the replacement of all flooring material and labor that fails due to moisture migration, excessive vapor emissions or contaminates…

• ….No further field moisture testing is required; however, if conducted, (the manufacturer) warrants up to 25 pounds of moisture per ASTM F 1869 or 100% RH per ASTM F 2170….



WATCH ITEMS / DISCUSSION POINTS

• The moisture mitigation “warranty” has numerous ways to be voided.

• “Product must be applied per manufacturer instructions.” How will you prove this?

• Must decide with owner who they would rather have a warranty with.

• The flooring manufacturer, or the company selling spray on material for 25 cents / sq. ft.

• Do not want to leave the door open for the flooring manufacturer to void their warranty.

• Almost no flooring manufacturer will warrant their product, adhesive etc. over any sort of chemical on the slab.• That is why chemical curing of concrete should only be permitted if the slab will

be bead blasted or sanded down prior to flooring. If not, the flooring manufacturer has an out if there is a failure.




• Case Study

• Existing slab had high levels of carbonation it top layer which prevented the topical silicate moisture barrier from activating. This caused a bond breaker layer between flooring and concrete. Floor failure occurred.

• No other system will warrant install over non‐activated product so ¼” of concrete needs to be ground off in order to get to “clean concrete”.

Older existing slabs might have chemical makeup that does not work with topical applied products that need “activation”.




• How do you know that had anything to do with the product?

• Was moisture testing performed to verify that there was even high moisture content?

• Many products state in their data that they will never pass a moisture test? But ALL flooring manufacturers require certain moisture levels.

• Again…Who do you want your warranty with?

• Certain concrete mixes and placement / curing techniques have been proven to result in lower moisture levels, not needing any mitigation.

• Many times you will hear…“We have used this product on XYZ sf of concrete and have had no issues.”



SPECIFICATIONS



RISK??

• Our risk is that the product may not perform long term….



HOAR’S PCCT POLICY



MANAGING OUR RISK….

• The purpose of this memo is to not only reiterate what our policy on Creteseal but to also make you aware that our position applies to all other PCCT (Penetrating Colloidal Concrete Treatment‐ spray on products used to control water vapor emissions control).

• A clarification in a contract or change order is always required, absolving Hoar of the responsibility if the owner so chooses to use these products.

• When an owner/architect elects to use these products on any project, the liability must either be passed on to the owner/architect as stated above or approval must be given by corporate management.



HOAR’S PCCT POLICY

• The purpose of this follow up memo is to not only reiterate what our policy on Creteseal and Barrier one is, but to also make you aware that our position applies to all other PCCT (Penetrating Colloidal Concrete Treatment‐ spray on products used to control water vapor emissions control).



BEST PRACTICE FOR MOISTURE MITIGATION

• Use under slab vapor barrier (15 mil) directly under concrete, with no sand layer.

• Reinforcing steel to help reduce possible slab curl.

• 3500 ‐ 4000 psi concrete with low water cement ratio (approx. .45)

• Finish concrete to smooth but non burnished finish. Allows moisture to escape.

• Wet cure with curing blankets, but do not add additional water after initial covering.

• Condition building a week prior to starting flooring.

• Perform RH testing (calcium chloride no longer recognized).

• Plan on epoxy resin moisture mitigation with leveling compound, but might not need it if moisture levels are acceptable.

Building Better Builders

MINUTES REMAINING

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Documents

CONCRETE MOISTURE MITIGATING PRODUCT USAGE...CONCRETE MOISTURE MITIGATING PRODUCT USAGE Presented by: Pape Fall and Jeff Keenan Hoar Construction, LLC and Kitchell Corporation ACIG