090516-2026-02 Subsurface Prep for Floor Finishes.docx
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- Z2JZ--Wellness Center Flooring Install / Service
- Solicitation number
- 36C25626Q1005
About this file
This is a technical specification document for subsurface preparation requirements for floor finishes, specifically Section 09 05 16 from the Construction Specifications Institute (CSI) MasterFormat system. The specification establishes comprehensive requirements for preparing concrete substrates prior to installation of applied and resinous flooring materials, including removal of existing floor coverings, moisture and pH testing, remedial coating application, and floor leveling and repair as needed.
The specification details three primary product systems: moisture remediation coatings (high-solids epoxy systems with minimum 10 mils thickness and less than 0.1 perm permeance rating per ASTM E96/E96M), cementitious self-leveling underlayments (calcium aluminate cement-based, minimum 4,100 psi compressive strength at 28 days, suitable for most flooring types with varying cure times from 6 hours to 7 days depending on flooring type), and cementitious trowel-applied underlayments (not suitable for resinous finishes, minimum 4,000 psi compressive strength). Environmental requirements mandate substrate and ambient temperatures between 60-85 degrees Fahrenheit and maintenance of ambient conditions for specified periods before and after testing. Surface preparation must comply with ASTM F710 and ASTM D4259 standards, including abrasive blasting methods, moisture testing per ASTM F1869 and ASTM F2170, and pH measurement per ASTM F710. The specification references multiple related sections for joint sealants, resilient flooring, resinous flooring systems, and carpeting, and requires submittals including product data, compatibility documentation, and independent testing agency reports confirming moisture and pH test results.
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Other files
| File | Type | Posted |
|---|---|---|
| 36C25626P1018 Award notice.docx | DOCX document | |
| 36C25626Q1005 0003.docx | DOCX document | |
| 36C25626Q1005 0002.docx | DOCX document | |
| 36C25626Q1005 0001.docx | DOCX document | |
| WD 2015-5233.pdf | ||
| 36C25626Q1005.docx | DOCX document | |
| Flooring Specifications 096519-2018-05.docx | DOCX document |
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Text version
02-01-26
SECTION 09 05 16
subsurface preparation for floor finishes
SPEC WRITER NOTES:
| 1. | Delete between // // if not applicable to project. Also delete any other item or paragraph not applicable in the section and renumber the paragraphs. |
| 2. | Coordinate with Section 01 33 23, SHOP DRAWINGS, PRODUCT DATA, and Section 01 45 29, TESTING LABORATORY SERVICES. |
| 3. | Detail expansion joint conditions. Show locations of expansion joints on drawings. |
GENERAL
DESCRIPTION
This section specifies subsurface preparation requirements for areas to receive the installation of applied and resinous flooring. This section includes //removal of existing floor coverings, // testing concrete for moisture and pH, // remedial floor coating for concrete floor slabs having unsatisfactory moisture or pH conditions, // floor leveling and repair // as required.
RELATED WORK
//Section 07 92 00, JOINT SEALANTS.// // Section 09 65 16, RESILIENT SHEET FLOORING // Section 09 65 19, RESILIENT TILE FLOORING // Section 09 67 23.20, RESINOUS EPOXY BASE WITH VINYL CHIP BROADCAST (RES-2) // Section 09 67 23.30, RESINOUS MORTAR (Epoxy Resin Composition) FLOORING // Section 09 67 23.50, RESINOUS (Epoxy Terrazzo) FLOORING (RES-5) // Section 09 67 23 60, RESINOUS (Urethane and Epoxy Mortar) FLOORING // Section 09 68 00, CARPETING // Section 09 68 21, ATHLETIC CARPETING.// SPEC WRITER NOTE: Delete submittals for products not used.
SUBMITTALS
Submit in accordance with Section 01 33 23, SHOP DRAWINGS, PRODUCT DATA and TEST DATA.
Written approval confirming product compatibility with subfloor material manufacturer and the flooring manufacturer Product Data:
Moisture remediation system Underlayment Primer Cementitious Self-Leveling Underlayment Cementitious Trowel-Applied Underlayment (Not suitable for resinous floor finishes) Test Data:
Moisture test and pH results performed by a qualified independent testing agency.
DELIVERY AND STORAGE
Deliver materials in containers with legible and intact labels and grade‑seals unbroken.
Store material to prevent damage or contamination.
SPEC WRITER NOTE: Update applicable publications to current issue at time of project preparation.
APPLICABLE PUBLICATIONS
Publications listed below form a part of this specification to the extent referenced. Publications are referenced in text by basic designation only.
ASTM International(ASTM):
| D638-14(2014) | Standard Test Method for Tensile Properties of Plastics |
| D4259-18(2019) | Standard Practice for Preparation of Concrete by Abrasion Prior to Coating Application. |
| C109/C109M-20b(2020) | Standard Test Method for Compressive Strength of Hydraulic Cement Mortars (Using 2-in. or [50-mm] Cube Specimens |
| 7234-19(2020) | Standard Test Method for Pull-Off Adhesion Strength of Coatings on Concrete Using Portable Pull-Off Adhesion Testers |
| E96/E96M-16(2016) | Standard Test Methods for Water Vapor Transmission of Materials |
| F710-1e1(2020) | Standard Practice for Preparing Concrete Floors to Receive Resilient Flooring |
| F1869-16a | Standard Test Method for Measuring Moisture Vapor Emission Rate of Concrete Subfloor Using Anhydrous Calcium Chloride |
| F2170-19a(2020) | Standard Test Method for Determining Relative Humidity in Concrete Floor Slabs Using in situ Probes |
| C348-20(2020) | Standard Test Method for Flexural Strength of Hydraulic-Cement Mortars |
| C191-19(2020) | Standard Test Method for Time of Setting of Hydraulic Cement by Vicat Needle |
PRODUCTS
SPEC WRITER NOTES:
Specify only that which applies to the project. Delete non applicable items.
MOISTURE REMEDIATION COATING
System Descriptions:
High-solids, epoxy system designed to suppress excess moisture in concrete prior to an overlayment. For use under resinous products, VCT, tile and carpet where issues caused by moisture vapor are a concern.
Products: Subject to compliance with applicable fire, health, environmental, and safety requirements for storage, handling, installation, and clean up.
System Components: Verify specific requirements as systems vary by manufacturer. Verify build up layers and installation method. Verify compatibility with substrate. Use manufacturer’s standard components, compatible with each other and as follows:
Liquid applied coating:
Resin: epoxy.
Formulation Description: Multiple component high solids.
Application: Per manufacturer’s written installation requirements.
Thickness: minimum 10 mils Material Vapor Permeance: Application shall achieve a permeance rating of less than 0.1 perm in accordance with ASTM E96/E96M.
Maximum RH requirement: 100% testing in accordance with ASTM F2170.
| Property |
| Test |
| Value |
Tensile Strength
| ASTM D638 |
| 4,400 psi |
Volatile Organic Compound Limits (V.O.C.)
| SCAMD Rule 1113 (Ammended 02/05/2016) |
| 25 grams per liter |
| Permeance |
| ASTM E96 |
| 0.1 perms |
| Tensile Modulus |
| ASTM D638 |
| 1.9X105 psi |
| Percent Elongation |
| ASTM D638 |
| 12% |
| Cure Rate |
| Per manufacture’s Data |
| 4 hours Tack free with 24hr recoat window |
| Bond Strength |
| ASTM D7234 |
| 100% bond to concrete failure |
CEMENTITIOUS SELF-LEVELING UNDERLAYMENT
System Descriptions:
High performance self-leveling underlayment resurfacer. Single component, self-leveling, cementitious material designed for easy application as an underlayment for all types of flooring materials. It is used for substrate repair and leveling.
Products: Subject to compliance with applicable fire, health, environmental, and safety requirements for storage, handling, installation, and clean up. Gypsum-based products are unacceptable.
System Characteristics:
Wearing Surface: smooth Thickness: Per architectural drawings, ranging from feathered edge to 1”, per application. Applications greater than 1” require additional 3/8” aggregate to mix or as recommended by manufacturer.
Underlayment shall be calcium aluminate cement-based, containing Portland cement. Gypsum-based products are unacceptable.
Compressive Strength: Minimum 4100 psi in 28 days in accordance with ASTM C109/C109M.
Flexural Strength: Minimum 1000 psi in 28 days in accordance with ASTM C348 Dry Time: Underlayment shall receive the application of //moisture insensitive tile in 6 hours, // floor coverings in 16 hours, // and resinous flooring in 3-7 days. // Primer: compatible and as recommended by manufacturer for use over intended substrate System Components: Manufacturer's standard components that are compatible with each other and as follows:
Primer:
Resin: copolymer Formulation Description: single component ready to use.
Application Method: Squeegee and medium nap roller.
All puddles shall be removed, and material shall be allowed to dry, 1-2 hours at 70F/21C.
Number of Coats: (1) one.
Grout Resurfacing Base:
Formulation Description: Single component, cementitious self-leveling high-early and high-ultimate strength grout.
Application Method: colloidal mix pump, cam rake, spike roll.
Thickness of Coats: Per architectural scope, 1” lifts.
Number of Coats: More than one if needed.
Aggregates: for applications greater than 1inch, require additional 3/8” aggregate to mix.
| Property |
| Test |
| Value |
Compressive Strength
| ASTM C109/C109M |
| 2,200 psi @ 24 hrs |
3,000 psi @ 7 days
Initial set time Final Set time
| ASTM C191 |
| 30-45 min. |
1 to 1.5 hours
| Bond Strength |
| ASTM D7234 |
| 100% bond to concrete failure |
CEMENTITIOUS TROWEL-APPLIED UNDERLAYMENT(NOT SUITABLE FOR RESINOUS FLOOR FINISHES) Underlayment shall be calcium aluminate cement-based, containing Portland cement. Gypsum-based products are unacceptable.
Compressive Strength: Minimum 4000 psi in 28 days Trowel-applied underlayment shall not contain silica quartz (sand).
Dry Time: Underlayment shall receive the application of floor covering in 15-20 minutes.
EXECUTION
ENVIRONMENTAL REQUIREMENTS
Maintain ambient temperature of work areas at not less than 16 degree C (60 degrees F), without interruption, for not less than 24 hours before testing and not less than three days after testing.
Maintain higher temperatures for a longer period of time where required by manufacturer's recommendation.
Do not install materials when the temperatures of the substrate or materials are not within 60-85 degrees F/ 16-30 degrees C.
SPEC WRITER NOTES:
| 1. | Coordinate specifications and details for existing conditions |
| 2. | Remove surface preparation requirements for existing conditions that do not apply |
SURFACE PREPARATION
Existing concrete slabs with existing floor coverings:
Conduct visual observation of existing floor covering for adhesion, water damage, alkaline deposits, and other defects.
Remove existing floor covering and adhesives. Comply with local, state and federal regulations and the RFCI Recommended Work Practices for Removal of Resilient Floor Coverings, as applicable to the floor covering being removed.
Concrete shall meet the requirements of ASTM F710 and be sound, solid, clean, and free of all oil, grease, dirt, curing compounds, and any substance that might act as a bond-breaker before application. As required prepare slab by mechanical methods. No chemicals or solvents shall be used.
General: Prepare and clean substrates according to flooring manufacturer's written instructions for substrate indicated.
Prepare concrete substrates per ASTM D4259 as follows:
0. Dry abrasive blasting.
Wet abrasive blasting.
Vacuum-assisted abrasive blasting.
Centrifugal-shot abrasive blasting.
Comply with manufacturer's written instructions.
Repair damaged and deteriorated concrete according to flooring manufacturer's written recommendations.
Verify that concrete substrates are dry.
Perform anhydrous calcium chloride test, ASTM F 1869. Proceed with application only after substrates have maximum moisture-vapor-emission rate of per flooring manufactures formal and project specific written recommendation.
Perform in situ probe test, ASTM F2170. Proceed with application only after substrates do not exceed a maximum potential equilibrium relative humidity per flooring manufacture’s formal and project specific written recommendation.
Provide a written report showing test placement and results.
Prepare joints in accordance with // Section 07 92 00, JOINT SEALANTS //and material manufacturer’s instructions. // Alkalinity: Measure surface pH in accordance with procedures provided in ASTM F710 or as outlined by qualified testing agency or flooring manufacturer’s technical representative.
Tolerances: Subsurface shall meet the flatness and levelness tolerance specified on drawings or recommended by the floor finish manufacturer. Tolerance shall also not to exceed 1/4” deviation in 10’. As required, install underlayment to achieve required tolerance.
Other Subsurface: For all other subsurface conditions, such as wood or metal, contact the floor finish or underlayment manufacturer, as appropriate, for proper preparation practices.
MOISTURE REMEDIATION COATING
Where results of relative humidity testing (ASTM F2170) exceed the requirements of the specified flooring manufacturer, apply remedial coating as specified to correct excessive moisture condition.
Prior to remedial floor coating installation mechanically prepare the concrete surface to provide a concrete surface profile in accordance with ASTM D4259.
Mix and apply moisture remediation coating in accordance with manufacturer’s instructions.
CEMENTITOUS UNDERLAYMENT
Install cementitious self-leveling underlayment as required to // correct surface defects, // floor flatness or levelness corrections to meet the tolerance requirements as or detailed on drawings, // address non-moving cracks or joints, // provide a smooth surface for the installation of floor covering,// or meet elevation requirements detailed on drawings.
Mix and apply in accordance with manufacturer's instructions.
PROTECTION
Prior to the installation of the finish flooring, the surface of the underlayment should be protected from abuse by other trades by the use of plywood, tempered hardwood, or other suitable protection course
FIELD QUALITY CONTROL
Where specified, field sampling of products shall be conducted by a qualified, independent testing facility.
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