This master should be used by designers working on Port of Portland construction projects and by designers working for PDX
tenants (“Tenants”). Usage notes highlight a few specific editing choices, however the entire section should be evaluated and
edited to fit specific project needs.
SECTION 072613 – MOISTURE MITIGATION SYSTEM
PART 1 - GENERAL
1.1
DESCRIPTION
A.
Moisture mitigation for new and existing concrete floor slabs. The system shall reduce the
vapor emissions of the concrete to less than 3 pounds and the underlayment or topping surface
shall be suitable to receive all types of floor coverings or sealers.
Revise specification sections listed in 1.2 based on project floor type.
1.2
RELATED WORK SPECIFIED ELSEWHERE
A.
Section 033000, Cast-in-Place Concrete
B.
Section 035416, Cement-Based Underlayment
C.
Section 096816, Axminster Woven Carpet for PDX Terminal
Review information in Section 033513 and incorporate into this section as necessary.
D.
1.3
Section 033513, Concrete Floor and Architectural CIP Finishing
REFERENCES
A.
ASTM: American Society for Testing and Materials
1.
ASTM D1653: Standard Test Methods for Water Vapor Transmission of Organic
Coating Films
2.
ASTM D4541: Standard Test Method for Pull-Off Strength of Coatings Using Portable
Adhesion Testers
3.
ASTM F710: Standard Practice for Preparing Concrete Floors to Receive Resilient
Flooring
4.
ASTM F1869: Standard Test Method for Measuring Moisture Vapor Emission Rate of
Concrete Subfloor Using Anhydrous Calcium Chloride
5.
ASTM F2170: Standard Test Method for Determining Relative Humidity in Concrete
Floor Slabs Using in Situ Probes
B.
ICRI: International Concrete Repair Institute
1.
ICRI CSP: Concrete Surface Profile Chips
C.
RFCI: Resilient Floor Covering Institute
1.
RFCI Recommended Work Practices for Removal of Resilient Floor Coverings
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MOISTURE MITIGATION SYSTEM
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1.4
SUBMITTALS
A.
Product Data: Provide manufacturer’s data sheets documenting physical characteristics and
product limitations of materials.
B.
Specified Requirements: Submit a certificate of specified requirements and qualification
statement from the manufacturer, applicator, and supervisor.
C.
Shop Drawings: Indicate locations where material will be applied.
D.
Concrete Testing Standard: Submit a copy of ASTM F710.
E.
Existing Condition Reports: Prior to installation of flooring moisture mitigation system, submit
written report by system representative of existing vapor transmission and alkalinity subfloor.
F.
Certification: Upon completion of flooring moisture mitigation system, submit written
certification by system representative that the subfloor meets requirement for vapor
transmission and alkalinity specified in this section.
G.
Manufacturer’s Installation Instructions:
1.
Indicate special procedures and conditions requiring special attention.
2.
Include information on mixing and application.
3.
Indicate type of floor drains required, details at floor drains, special procedures, and
perimeter conditions requiring special attention.
H.
Facility Use Data: Include recommended procedures for re-flooring in the future.
1.5
QUALITY ASSURANCE
A.
Certify that products meet or exceed specified requirements.
B.
Manufacturer Qualifications: Company specializing in manufacturing products specified in this
section with a minimum of 5 years experience.
C.
Applicator Qualifications: Company specializing in performing work of this section with a
minimum of 5 years experience and approved by the manufacturer.
D.
Supervisor Qualifications: Trained by product manufacturer under direct full-time supervision
of manufacturer’s own foreman.
E.
Provide all materials of the system including but not limited to primers, resins, hardening agents
and finish or sealing coats from a single manufacturer.
1.6
DELIVERY, STORAGE, AND HANDLING
A.
Store all materials under cover and elevated above grade.
B.
Store products in manufacturer’s unopened packaging until ready for installation.
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C.
1.7
Keep dry and protect from direct sun exposure, freezing, and ambient temperature greater than
70°F.
FIELD CONDITIONS
A.
Do not install system until floor penetrations and peripheral work are complete.
B.
During the curing process, ventilate spaces to remove excess moisture.
PART 2 - PRODUCTS
Verify that the contact information is correct. Edit with updated contact name and phone number if needed.
2.1
MANUFACTURERS
A.
Aquafin Vaportight Coat - SG3 for moisture emissions from 20 to 25 pounds.
1.
Contact: Mark Schneider, 206-723-4895.
B.
Ardex MC for emission rates up to 20 pounds.
1.
Contact Don Richards, 206-979-0401 (cell)
C.
Koester Waterproofing Systems for emission rates up to 25 pounds used with Bonsal/Prospec
Underlayments.
1.
Contact Bob Sallee, 800-370-7821
D.
Or pre-bid approved equal.
2.2
MATERIALS
A.
System Main Component: Epoxy based materials. Materials vary with manufacturer.
B.
Crack filler: Manufacturer’s approved products for use.
C.
Water: Sufficiently cool so as not to speed up mix setting.
D.
Manufacturer’s certification that the system has been tested in accordance with ASTM D1653
and has a permanency rating of less than 0.05.
2.3
MIXING
A.
Mix materials on site in accordance with manufacturer’s instructions.
B.
Mix to self-leveling consistency without overwatering.
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PART 3 - EXECUTION
3.1
EXAMINATION
A.
Record condition of floor.
B.
Shall be installed only over concrete surfaces that have been properly mechanically prepared to
a minimum surface profile of ICRI CSP #3, and which have a moisture emission level of 20
pounds or less at the time of testing when measured in accordance with ASTM F1869, or an RH
value of 95 percent or less when measured in accordance with ASTM F2170.
C.
Verify that surfaces are flat to tolerances acceptable to flooring manufacturer, free of cracks that
might telegraph through flooring, clean, and dry. Surfaces shall also be free of curing
compounds, surface hardeners, and other chemicals that might interfere with bonding of
flooring to substrate.
D.
Verify that subfloor surfaces are smooth and flat within the tolerances specified for that type of
work and are ready to receive resilient flooring.
E.
Verify that subfloor surfaces are dust-free and free of substances that could impair bonding of
adhesive materials to sub-floor surfaces.
F.
Verify that concrete subfloor surfaces are dry enough and ready for resilient flooring installation
by testing for moisture emission rate and alkalinity in accordance with ASTM F710. Obtain
instructions if test results are not within limits recommended by resilient flooring and adhesive
materials manufacturers.
G.
Verify that required floor-mounted utilities are in correct location.
3.2
PREPARATION
A.
Remove existing resilient flooring and flooring adhesives. Follow the recommendations of
RFCI Recommended Work Practices for Removal of Resilient Floor Coverings.
B.
All concrete substrates shall be structurally sound, solid, and mechanically prepared to a
minimum surface profile of ICRI CSP #3 (light shotblast).
1.
All concrete subfloors must be of adequate tensile strength.
a.
Minimum 200 psi when tested in accordance with ASTM D4541 Method 5.
2.
The concrete shall be clean, and free of oil, grease, dirt, curing compounds, and any
substance that might act as a bond breaker.
a.
Mechanically clean using shot blasting or other method to achieve the specified
profile.
b.
Acid etching and the use of sweeping compounds and solvents are not acceptable
means of preparing the concrete.
3.
Test substrates for moisture vapor emissions in accordance with ASTM F1869 and
ASTM F 2170.
4.
All cracks in the subfloor shall be repaired to minimize telegraphing through the
underlayment.
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C.
3.3
Joint and Crack Preparation
1.
Moving Joints: Honor all expansion and isolation joints up through the system and
underlayment or topping.
2.
Saw Cuts, Control Joints, and Dormant Cracks: Fill all non-moving joints and cracks
greater than 1/32 inch with manufacturer’s approved cementitious filler. Once the cracks
and joints have been properly filled, allow these areas to cure prior to proceeding with the
installation of the system.
INSTALLATION
A.
Starting installation constitutes acceptance of subfloor conditions.
B.
Install in accordance with manufacturer’s instructions.
C.
Where system stops, terminate under centerline of door and at wall edges.
3.4
CLEANING
A.
Remove excess adhesive from floor, base, and wall surfaces without damage.
B.
Clean in accordance with manufacturer’s instructions.
C.
Clean, seal, and wax resilient flooring products in accordance with manufacturer’s instructions.
3.5
PROTECTION
A.
Prohibit traffic on resilient flooring and base for 48 hours after installation.
B.
Prior to the installation of the underlayment, topping, finish flooring, or sealer, the system shall
be protected from abuse by other trades by the use of plywood, Masonite, or other suitable
protection course.
END OF SECTION 072613
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