VCSFA RFP 26.200300-020-020_Amendment02.pdf

VIRGINIA COMMERCIAL SPACE FLIGHT AUTHORITY

REQUEST FOR PROPOSAL (RFP) AMENDMENT

RFP 26.200300-020-020

Launch Team Maintenance Facility Design-Build

Amendment 02

Issue Date: 3/20/2026

Subject: Request for Proposal (RFP) Amendment 02

Reference: Launch Team Maintenance Facility Design-Build

Issuing Organization: Virginia Commercial Space Flight Authority 101 West Main Street, Suite 602 Norfolk, VA 23510

Location of Work: Mappsville Facility

13249 Lankford Hwy, Mappsville, VA 23407

This document shall serve as official notice of amendment to above Reference. Such notice is being provided to all offerors to which the original solicitation was sent. Offerors submitting a proposal response shall acknowledge receipt of this solicitation amendment prior to the hour and date specified herein as follows: sign and return a copy of this amendment with the solicitation response being submitted, or, if the offeror has already submitted a response and desires not to change their proposal, submit this acknowledgement signed and return prior to the solicitation deadline. If the Offeror has already submitted a response, the response may be withdrawn, revised and re-submitted if the supplier chooses. Any re-submitted response shall be accompanied by signed acknowledgment of this amendment. All amendment acknowledgments sent separately or with a revised proposal shall have the solicitation number in the subject line of the email.

All proposals shall be emailed to solicitations@vaspace.org on or before the final deadline of 4/01/2026 4:00 p.m.

EST.

The purpose of Amendment 02 is as follows:

1. To provide answers to vendor questions.

All terms and conditions remain unchanged.

Name and Address of Offeror: ________________________________________________________________

Authorized Signature/Title Date Printed Name

Email Phone Number mailto:solicitations@vaspace.org

VIRGINIA COMMERCIAL SPACE FLIGHT AUTHORITY

REQUEST FOR PROPOSAL (RFP) AMENDMENT

RFP 26.200300-020-020

Amendment 02

Questions and VCSFA Responses

1. Is there a wage scale requirement for this project?

VCSFA: There is no wage scale requirement for this project.

2. Will all holes from equipment and hangers need to be patched in the liner panels?

VCSFA: Yes, patch for appearance

3. Will all existing plumbing fixtures and piping, HVAC equipment and ductwork, processing piping, electrical gear, fixtures, and conduits are to be removed in their entirely?

VCSFA: Yes, all existing plumbing fixtures and piping, HVAC equipment and ductwork, processing piping, electrical gear, fixtures, and conduits shall be removed from the area specified in this RFP

4. Will trench drains need to be cleaned out?

VCSFA: Yes, all trench drains will need to be cleaned out

5. Will the existing structure where covered loading dock and open loading dock are to be located be removed in its entirety?

VCSFA: Yes, the current loading dock roof structure and framing will need to be removed in its entirety

6. Is the awning over the covered loading dock a hard or soft awning?

VCSFA: New Awning will need to be a hard awning/ roof structure to align with current roof line and provide adequate drainage away from the building.

7. Fire Alarm & Fire Protection Systems

a. Will the fire alarm detection system for the Launch Team Maintenance area tie into the existing panel from the previous phase, or is a new panel required for this phase?

VCSFA: The fire alarm detection system for the Launch Team Maintenance area will need to tie into the existing system. Current service provided by BFPE International

b. Is this space to be served by the existing/new fire alarm and fire sprinkler systems from the previous phase, or will separate dedicated systems (including incoming services) be required?

VCSFA: The existing fire alarm detection and fire sprinkler system (Current service provided by BFPE International) will be operational. However, requirements for the coverage in this area will need to be verified during the design by Engineer of Record (EOR).

c. It appears the space is partially protected by existing fire alarm and sprinkler systems. Is full coverage

(complete device layout and sprinkler protection) required as part of this project?

VCSFA: Requirements for the coverage in this area will need to be verified during the design by

EOR.

d. Will any operations within this space require specialized fire suppression systems?

VCSFA: NO operations have been identified as needing specialized fire suppression systems

e. Will any hoods and/or spray booths be included that require dedicated fire suppression systems?

VCSFA: No hood or spray booths have been requested, no dedicated fire suppression system needs identified

f. Existing conditions note a fire pump and water storage tank. Are these to remain, be reused, or replaced under this contract?

VCSFA: This contract will not include any work to the existing fire pump or water tank. The intent of VSA is to have those systems operational independent of this contract.

g. There is reference to an existing addressable Silent Knight Model 5820XL FACP. Is this panel to be reused or replaced? If reused, please confirm available spare capacity.

VCSFA: There will be capacity to support the fire alarm available in a new panel to be installed under another contract in the same area as the new electrical room noted on G-100

8. Construction Coordination

a. Will the A/E team participate in weekly construction coordination (“tag-up”) meetings?

VCSFA: It is expected that A/E participate in weekly construction coordination as needed.

9. Demolition & Existing Conditions

a. Is complete demolition of the existing roof and supporting structure at the proposed loading dock included in the base bid?

VCSFA: Yes.

b. Is the existing concrete slab to remain in place despite moderate cracking noted in the BRPH report?

VCSFA: Slab should remain, repairs to be performed as needed.

c. The BRPH report notes “signs of settlement” at the exterior wall. Based on available information, Pro Coat assumes deterioration is limited to the wall system and framing, not foundation settlement. Please confirm.

VCSFA: Assume limited to wall systems, Structural engineer assigned can evaluate if there are foundation settlement concerns.

10. Trench Drain

a. Is it acceptable, at the contractor’s option, to remove trench drain gratings and infill with concrete in lieu of replacing the grating?

VCSFA: This will be an acceptable consideration, Please provide cost comparison between trench infill and grating replacement as a line item on bid sheet.

b. Will trench drains be subject to foot traffic only, or are they required to support vehicular/forklift loading?

If limited to foot traffic, would fiberglass grating be acceptable?

VCSFA: There is a potential that the grating will see forklift traffic, please assume this for all grating.

11. Architectural & Accessibility

a. Are there any restricted access requirements between this space and adjacent areas (Logistics, Processing, etc.)?

VCSFA: None identified

b. Should ADA-compliant access (including ramps, if required) be included in this scope?

VCSFA: Awarded design team to determine where ADA compliant access will be required, but this should be considered.

c. Please confirm specifications for storefront at the breakroom, including framing type, finish, and glazing (e.g., thermally broken aluminum storefront, clear anodized finish, 1" insulated low-E tempered glass).

VCSFA: Awarded design team to determine window type, to be verified during the design by EOR

12. Structural / Building Systems (Bid Options):

a. Bid Option #1 vs. #10: Please clarify demolition scope included in each and how they differ.

VCSFA: Bid option 1 is to remove old freezer room. The intent bid option #10 is for demolishing of existing mechanical equipment along with general cleaning, repairs, and new finishes inline with the rest of the build to support the VSA Launch Team. Bid Option #10 will not include any outfitting such as air compressor or workspaces.

b. Bid Option #2 – Water Softener Enclosure:

i. Is the enclosure required regardless of acceptance of Bid Option #2?

VCSFA: Yes enclosure is required to protect equipment.

ii. Does scope include a roof?

VCSFA: Yes a roof will be required

iii. Confirm preferred framing system (e.g., cold-formed steel framing with metal panels).

VCSFA: Cold formed steel with metal insulated panels is acceptable, Awarded design team to validate and provide additional feedback.

c. Bid Option #2 – Loading Dock Awning: Please confirm structural system and materials, including framing type (hot-rolled vs. cold-formed), finish (galvanized/painted), and roofing material.

VCSFA: Ultimately the Awarded design team (structural engineer) will determine needs, VSA would prefer hot-rolled steel, and a galvanized finish with appropriate roofing to match existing.

d. Bid Option #10 – Room Renovations: Please provide detailed scope requirements for renovations.

VCSFA: The intent is for demolishing of existing mechanical equipment along with general cleaning, repairs, and new finishes inline with the rest of the build to support the VSA Launch Team. Bid Option #10 will not include any outfitting such as air compressor or workspaces.

13. Mechanical (HVAC)

a. Will Bid Option #5 (Assembly Room) require a dedicated HVAC system?

VCSFA: Room doesn’t need to be on separate HVAC, however HVAC designer to determine if a dedicated system is required.

b. Will Bid Option #6 (Potential Office) require a dedicated HVAC system?

VCSFA: Potential office will not require dedicated HVAC if constructed at this time, should be able to be a part of the system conditioning the O&M office. HVAC design to determine if a dedicated system is required.

14. “Statement of Needs” Section B, Item 2, states “Lead Abatement for the renovated space covered under this scope, as required. Reference the attached Mappsville Lead Paint Survey Report.” After reviewing the report and cross-referencing the construction activity areas, while the samples contain detectable amounts of lead, none of the samples surveyed are considered lead-based paint (Attachment C, Section 1.4.1). Some of the samples taken are on components to be demolished (Samples 3, 8, 12, and 44). However, other samples are on surfaces that are to remain in place (Samples 5, 9, and 13). For those surfaces that are to remain and have detectable amounts of lead, though not LBP, is encapsulation an acceptable alternative to full abatement?

VCSFA: No, encapsulation is not an option at this time. The intent of the Lead Abatement if for complete removal of detectable lead.

15. Sheet AD-100 calls for water supply to be relocated to location shown on A-100. Sheet A-100 does not specifically call out the water supply location. Is the area identified as the New Water Softener Enclosure the intended location of the new water supply?

VCSFA: Yes, that is the intended location of the relocated water supply.

16. Attachment C, Section 1.0 calls for the design of the “fabrication shop”. Please identify which area on the 30% Design Drawings is the fabrication shop.

VCSFA: Fabrication area is shown on A-100 as Open shop (860 sq. ft)

17. Electrical scope clarification:

a. Attachment C, Section 7.2 states that the Electrical room will be equipped with 480Y/277V and 208Y/120V panelboards. Is this equipment in the to-be-constructed green shaded area on Sheet G-100?

VCSFA: Yes, this will be the location of new electrical room

b. The next paragraph references (3) 200A panelboards located throughout the facility. Are these panelboards part of the electrical service being installed along with the shaded green area on Sheet G-100, or are the (3) panelboards expected as part of the construction effort with the current RFP?

VCSFA: Panelboards, their location, design, and feeding them is part of the current RFP scope.

18. For the loading dock effort, is it the Owner’s intent to demolish the equipment, walls, and roof in this area and to utilize the existing concrete slab for the new loading dock?

a. Does the heavy black line around the perimeter of the Open Loading Dock indicate walls should be constructed, or is this line only the limit of the loading dock foot print?

VCSFA: Yes the intention is to remove all walls, roof and equipment in the existing area. Repair and reuse of the existing slab is the expectation. The heavy black is the limit of the loading dock, the only walls in this area that need to be constructed are for the water softener/ supply room and a portion of the wall between the open shop and loading dock

b. If the roof is to be demolished entirely, please confirm that the existing roof-mounted mechanical equipment will be removed by others, prior to demolition under this scope of work commencing.

VCSFA: The equipment will be removed under another contract and the roof repaired. Existing penetration removal/repair is excluded from this scope of work, but the contractor shall be responsible for any new roof penetrations as required to accomplish the scope of work outlined in this RFP.

19. Attachment D: Is the scope of work included in Bid Option #2 only to install a roof over the loading dock?

VCSFA: This will need to include the support structure for the awing system.

20. Bid Option #7: What are the load capacity requirements for the new ramp?

VCSFA: Ramp shall be capable of supporting a loaded forklift, Engineer of Record (EOR) to aid determining loads for ramp

21. Bid Option #10: What are the design requirements for the renovation of the Boiler Room, Shop Air Compressor Room, and 860SF Open Shop Room?

VCSFA: The intent is for demolishing of existing mechanical equipment along with general cleaning, repairs, and new finishes in line with the rest of the build to support the VSA Launch Team. Bid Option #10 will not include any outfitting such as air compressor or workspaces.

22. Attachment C, Section 2.2.2 identifies several different floor finishes including carpet and vinyl plank flooring.

The subsequent finish schedule only calls for resinous floor.

a. Please clarify if any rooms in this project should receive carpet or vinyl plank flooring

VCSFA: Section 2.2.2 provides VSA standard specifications for finishes. The schedule listed should be used to identify the rooms and their finishes. There are currently no rooms identified that will require carpet or vinyl plank. These may be value engineered later in the process.

b. Please provide specifications for the resinous flooring material desired.

VCSFA: See Resinous flooring specification document, attached. The existing concrete floor is predominantly covered with an industrial coating and has some areas of bare concrete and VCT. If applicable to installation guidelines of the new product, VSA will allow installation over existing floor with proper surface preparation. Contractor shall verify means and methods with VSA prior to installation.

Attachments

1. Resinous Flooring Specification

096723-1

SECTION 096723

RESINOUS FLOORING

SHERWIN-WILLIAMS HIGH PERFORMANCE FLOORING, RESUFLOR PERFORMANCE HPS/HTS

PART 1 GENERAL

1.1 SECTION INCLUDES

A. Resinous Systems of the Following Types:

1. Sherwin-Williams HPF, Resuflor Performance HPS/HTS .

1.2 RELATED SECTIONS

A. Section 03300 – Cast-In-Place Concrete.

1.3 REFERENCES

A. ASTM International (ASTM):

1. ASTM C 413 - Standard Test Method for Absorption of Chemical-Resistant Mortars, Grouts, Monolithic Surfacings, and Polymer Concretes.

2. ASTM D 635 - Standard Test Method for Rate of Burning and/or Extent and Time of

Burning of Plastics in a Horizontal Position.

3. ASTM D 695 - Standard Test Method for Compressive Properties of Rigid Plastics.

4. ASTM D1475 - Standard Test Method For Density of Liquid Coatings, Inks, and

Related Products.

5. ASTM D 2047 - Standard Test Method for Static Coefficient of Friction of Polish-

Coated Flooring Surfaces as Measured by the James Machine.

6. ASTM D 2240 - Standard Test Method for Rubber Property—Durometer Hardness.

7. ASTM D 2244 - Standard Practice for Calculation of Color Tolerances and Color

Differences from Instrumentally Measured Color Coordinates.

8. ASTM D2369 - Standard Test Method for Volatile Content of Coatings.

9. ASTM D 2370 - Standard Test Method for Tensile Properties of Organic Coatings.

10. ASTM D 3960 - Standard Practice for Determining Volatile Organic Compound (VOC)

Content of Paints and Related Coatings.

11. ASTM D 4060 - Standard Test Method for Abrasion Resistance of Organic Coatings by the Taber Abraser.

12. ASTM D 4366 - Standard Test Methods for Hardness of Organic Coatings by

Pendulum Damping Tests

13. ASTM D5441 - Standard Test Method for Analysis of Methyl Tert-Butyl Ether (MTBE) by Gas Chromatography.

14. ASTM D 7234 - Standard Test Method for Pull-Off Adhesion Strength of Coatings on

Concrete Using Portable Pull-Off Adhesion Testers.

15. ASTM F 1869 - Standard Test Method for Measuring Moisture Vapor Emission Rate of Concrete Subfloor Using Anhydrous Calcium Chloride.

16. ASTM F 2170 - Standard Test Method for Determining Relative Humidity in Concrete

Floor Slabs Using in situ Probes

17. ASTM G 154 - Standard Practice for Operating Fluorescent Ultraviolet (UV) Lamp

Apparatus for Exposure of Nonmetallic Materials.

B. Deutsches Institute fur Normung (DIN):

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1. DIN 53460 – Testing of Plastics; Determination of the Vicat Softening Temperature of

Thermoplastics.

C. International Concrete Repair Institute (ICRI):

1. ICRI 310.2R - Selecting and Specifying Concrete Surface Preparation for Sealers, Coatings, Polymer Overlays, and Concrete Repair.

D. Military Specifications (MIL):

1. MIL-D-3134J - Deck Covering Materials.

E. National Floor Safety Institute (NFSI):

1. ANSI/NFSI B101.1 - Test Method for Measuring Wet SCOF of Common Hard-Surface

Floor Materials.

1.4 SUBMITTALS

A. Submit under provisions of Section 01300.

B. Product Data:

1. Manufacturer's data sheets on each product to be used, including properties, VOC content, wet static coefficient of friction, compressive strength, tensile strength, elongation and similar properties.

2. Preparation instructions and recommendations.

3. Storage and handling requirements and recommendations.

4. Typical installation methods.

C. Verification Samples: Two representative units of each system, including color and texture.

D. Shop Drawings: Include details of materials, construction and finish. Include relationship with adjacent construction.

E. Manufacturer’s Certification: Submit manufacturer’s certification that materials comply with specified requirements and are suitable for intended application.

F. Manufacturer’s Project References: Submit manufacturer’s list of successfully completed resinous flooring system projects, including project name and location, name of architect, and type and quantity of flooring systems furnished.

G. Applicator’s Project References: Submit applicator’s list of successfully completed resinous flooring system projects, including project name and location, name of architect, and type and quantity of flooring systems applied.

H. Care and Maintenance Instructions: Submit manufacturer’s care and maintenance instructions, including cleaning instructions.

1.5 QUALITY ASSURANCE

A. Manufacturer Qualifications: Company specializing in manufacturing products specified in this section with a minimum five years documented experience.

B. Applicator’s Qualifications:

1. Applicator regularly engaged, for a minimum of 5 years, in application of resinous flooring systems of similar type to that specified.

2. Employ persons trained for application of resinous flooring systems.

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C. Source Limitations: Provide each type of product from a single manufacturing source to ensure uniformity.

D. Mock-Up: Construct a mock-up with actual materials in sufficient time for Architect’s review and to not delay construction progress. Locate mock-up as acceptable to Architect and provide temporary foundations and support.

1. Intent of mock-up is to demonstrate quality of workmanship and visual appearance.

2. If mock-up is not acceptable, rebuild mock-up until satisfactory results are achieved.

3. Retain mock-up during construction as a standard for comparison with completed work.

4. Do not alter or remove mock-up until work is completed or removal is authorized.

1.6 PRE-INSTALLATION CONFERENCE

A. Convene a conference approximately two weeks before scheduled commencement of the

Work. Attendees shall include Architect, Contractor and trades involved. Agenda shall include schedule, responsibilities, critical path items and approvals.

1.7 DELIVERY, STORAGE, AND HANDLING

A. Delivery Requirements: Deliver materials to site in manufacturer’s original, unopened containers and packaging, with labels clearly identifying product name, manufacturer, and batch number.

B. Storage and Handling Requirements:

1. Store and handle materials in accordance with manufacturer’s instructions.

2. Keep materials in manufacturer’s original, unopened containers and packaging until application.

3. Store materials in clean, dry area indoors between 65 and 80 degrees F (18 and 27 degrees C).

4. Store materials out of direct sunlight.

5. Keep materials from freezing.

6. Protect materials during storage, handling, and application to prevent contamination or damage.

1.8 PROJECT CONDITIONS

A. Apply flooring system under the following ambient conditions:

1. Ambient and Concrete Floor Temperatures: Between 65 and 85 degrees F (18 and

29 degrees C).

2. Material Temperature: Between 65 and 80 degrees F (18 and 29 degrees C).

3. Relative Humidity: Maximum 80 percent.

4. Dew Point: Floor temperature more than 5 degrees over dew point.

B. Do not apply flooring system under ambient conditions outside manufacturer’s limits.

1.9 WARRANTY

A. Submit manufacturer’s standard warranty.

PART 2 PRODUCTS

2.1 MANUFACTURERS

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A. Acceptable Manufacturer: The Sherwin-Williams High Performance Flooring, 866-540-1299 swflooring@sherwin.com Website: https://industrial.sherwin-williams.com/na/us/en/resin-flooring.html

B. Requests for substitutions will be considered in accordance with provisions of Section

01600.

2.2 SHERWIN-WILLIAMS HPF, RESULFOR PERFORMANCE HPS/HTS

A. Resuflor Performance HPS/HTS.

1. Primer Coat: Resuflor MPE, 3-5 mils.

2. Build Coat: Resuflor UVE, 7-13 mils.

3. Topcoat: Resutile HTS 100, 3 mils.

4. Color: As selected by Architect from manufacturer's full range.

2.3 SYSTEM PROPERTIES

A. Sherwin-Williams Resulfor Performance HPS/HTS:

1. Abrasion Resistance Taber Abraser CS-17 Taber Abrasion Wheel, 1,000 gram load, 1,000 revolutions, ASTM D4060, 18.8 mg/loss

2. Adhesion to Concrete, psi (MPa), ASTM D4541, 450 [3.10] (concrete failed)

3. Adhesion to concrete, psi [MPa], ASTM D7234, 732[4.48] (concrete failed)

4. Coefficient of Friction-COF, James Friction Tester, ASTM D2047, 0.61

5. Coefficient of Friction-Wet Static, BOT 3000, ANSI/NFSI B101.1, 0.99

6. Compressive Strength, psi [MPa], ASTM D695, 13,500 [93.08]

7. Flammability, mm/min, ASTM D635, 182

8. König Hardness 93 mil/0.08 mm film), ASTM D4366, 171.3

9. Resistance to Yellowing as measured using ASTM D2244 after 1000 consecutive hours UV exposure in QUV, ASTM G154, <10 increase of yellow units (CIE Lab Δ) if pigmented topcoat

10. Shore D Hardness, ASTM D2240, 80-85 @ 0 sec|75-80 @ 15 sec

11. Tensile Strength, psi [MPa], ASTM D2370, 6,250 [43.09]

12. Percent Elongation, ASTM D2370, 6%

13. Volatile Organic Compound, VOC lb./gal [g/l], ASTM D3960, Resuflor MPE A+B=0.41

[49] Restile HPS 100 A+B=0.06 [7]

14. Water Absorption, 24- hour immersion, ASTM C413, 0.2% weight increase

2.4 PRODUCT PROPERTIES

A. Resuflor MPE: A neutral, two-component, high solids epoxy.

1. Percent Solids, by weight (by volume), ASTM D1475, A + B: 95.45 (94.56).

2. Volatile Organic Compound-VOC, ASTM D3960, Mixed A + B: 0.41 lb./gal (49 g/L).

3. Abrasion Resistance, mg loss, Taber Abraser, C-17 Taber Abrasion Wheel, 1,000 gram load, 1,000 revolutions, ASTM D4060: 83.1.

4. Coefficient of Friction-COF, James Friction Tester, ASTM D2047: 0.59-0.62.

5. Adhesion to Concrete, ASTM D5441: 732 psi (4.48 MPa) concrete failed.

6. Adhesion to Concrete, ASTM D7234: 450 psi (3.10 MPa) concrete failed.

7. Compressive Strength, ASTM D695: 13,500 psi (93.079 MPa).

8. Tensile Strength, ASTM D2370: 8,000 psi (55.158 MPa).

9. Percent Elongation, ASTM D2370: 5.

10. Shor D Hardness, ASTM D2240: 80-85 at 0 sec, 75-80 at 15 sec.

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B. Resutile HPS 100: A clear, high solids, two-component, gloss finish, aliphatic, moisture-cure urethane.

1. Percent Solids, by weight( by volume), ASTM D2369, A+B: 91.34 (91.60).

2. Volatile Organic Compound-VOC, ASTM D3960, Mixed A + B: 0.06 lb./gal (7 g/l).

3. Abrasion Resistance, mg loss, Taber Abraser, C-17 Taber Abrasion Wheel, 1,000 gram load, 1,000 revolutions, ASTM D4060: 18.8.

4. Coefficient of Friction-COF, James Friction Tester: 0.61.

5. Wet Static Coefficient of Friction, BOT 3000, ANS/NFSI B101.1: 0.99.

6. Flammability, ASTM D635: 182 mm/min.

7. Resistance to Yellowing as measured using ASTM D2244 after 1000 consecutive hours UV exposure in QUV, ASTM G154, Less than 10 increase of yellow units (CIE

Lab Δb)

8. Tensile Strength, ASTM D2370: 6,250 psi (43.09 MPa).

9. Percent Elongation, ASTM D2370: 6.

10. König Hardness, (3 mil/76.2 micron film), ASTM D4366: 171.3.

11. Water Absorption, 24-hour immersion, ASTM C413: 0.2 percent weight increase.

PART 3 EXECUTION

3.1 EXAMINATION

A. Examine concrete surfaces to receive flooring system. Verify concrete is structurally sound.

B. Moisture Testing of Concrete: Perform at least one of the following two tests to determine moisture in concrete. Type of test and frequence as recommended by manufacturer and installer.

1. In-situ Probe Test:

a. Measure relative humidity in concrete in accordance with ASTM F 2170.

b. Application of flooring system shall start only if test results are below 75 percent relative concrete humidity.

c. If test results are above limits, notify Architect and flooring manufacturer in writing.

C. Do not begin preparation or installation until satisfactory moisture test results are achieved.

Provide flooring manufacturer's recommended moisture vapor control coating if required.

3.2 PREPARATION

A. Clean surfaces thoroughly prior to installation.

B. Protection of In-Place Conditions: Protect adjacent surfaces and adjoining walls from contact with flooring system materials.

C. Surface Preparation:

1. Prepare concrete surface in accordance with manufacturer’s instructions.

2. Remove dirt, dust, debris, oil, grease, curing agents, bond breakers, paint, coatings, sealers, silicones, and other surface contaminants which could adversely affect application of flooring system.

3. Steel shot blast concrete to a minimum surface profile of ICRI 310.2R, CSP 5.

4. Key-cut termination points with 1/4-inch (6-mm) by 1/4-inch (6-mm) cut.

5. Patch depressions, divots, and cracks in concrete in accordance with manufacturer’s instructions.

6. Mechanically remove loose, delaminated, and damaged concrete and repair in accordance with manufacturer’s instructions.

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7. Joints: Fill joints in accordance with manufacturer’s instructions.

3.3 INSTALLATION

A. Install flooring system in accordance with manufacturer’s instructions and approved submittals at locations indicated on the Drawings.

B. Ensure concrete is dry, clean, and prepared in accordance with manufacturer’s instructions.

C. Allow concrete to cure a minimum of 7 days before applying flooring system.

D. Mixing:

1. Mix material components together in accordance with manufacturer’s instructions.

2. Mix only enough material that can be applied within working time.

3. Add and mix colorants with materials in accordance with manufacturer’s instructions to achieve uniform color.

E. Apply flooring system materials to obtain consistent mil thickness and smooth, uniform appearance and texture.

F. Overlay: Apply overlay in accordance with manufacturer’s instructions. Apply overlay to prepared concrete surface.

G. Traction Aggregate: Broadcast traction aggregate in accordance with manufacturer’s instructions. Broadcast traction aggregate into wet overlay.

H. Cove:

1. Apply cove primer and cove in accordance with manufacturer’s instructions at locations indicated on the Drawings.

2. Apply cove to height and shape as indicated on the Drawings.

3. Apply cove to create seamless, smooth transition between flooring and walls.

I. Seal Coat:

1. Apply seal coat in accordance with manufacturer’s instructions.

2. Apply seal coat over traction aggregate.

3.4 FIELD QUALITY CONTROL

A. Field Inspection: Coordinate field inspection in accordance with appropriate sections in

Division 01.

B. Manufacturer’s Services: Coordinate manufacturer’s services in accordance with appropriate sections in Division 01.

3.5 CLEANING AND PROTECTION

A. Allow flooring system to dry in accordance with manufacturer’s instructions before opening to traffic.

B. Allow flooring system to dry a minimum of 1 week before cleaning by mechanical means.

C. Protect completed flooring system from damage during construction.

END OF SECTION

SURFACE

PREPARATION

GUIDELINE INSTRUCTIONS FOR CONCRETE SURFACE

PREPARATION (FORM G-1, REVISED 02/26)

INTRODUCTION

The following concrete surface preparation guidelines serve as an aid to owners, design professionals, specifiers and contractors. All surfaces to receive Sherwin-Williams High Performance Flooring sealers, coatings, mortars and resurfacers must be structurally sound and clean. Proper surface preparation is an extremely important factor in the immediate and long-term successful performance of applied polymer floor or wall systems.

The contractor responsible for the installation of the polymer system shall be provided a substrate that is clean, durable, flat, pitched to specifications and free of surface contaminants. Providing the properly prepared substrate is the responsibility of the owner, the owner’s appointed representative and the concrete contractor, unless specifically stated otherwise.

PROPER SURFACE PREPARATION

Proper surface preparation includes the following:

1. Inspection of the concrete substrate

2. Removal and replacement of non-durable concrete

3. Decontamination of the concrete surface

4. Creation of surface profile

5. Repair of surface irregularities

1. � Inspection of the concrete substrate to determine its general condition, soundness, presence of contaminants, presence of moisture vapor emissions and the best methods to use in preparation of the surface to meet the requirements of the owner or the owner’s appointed representative is critical. A proper evaluation will lead to the selection of the proper tools and equipment to accomplish the objective.

2. � Removal and replacement of non-durable concrete must be accomplished prior to installation of the polymer system. Localized weak or deteriorated concrete must be removed to sound concrete and replaced with either cementitious or polymer concrete repair mortars or an engineered concrete mix design. For application of these systems and compatibility with the selected polymer sealer, coating, lining or topping, refer to the appropriate application guide or the Technical Service Department.

3. � Decontamination of the concrete surface. ASTM D 4258-83 Standard Practice for Surface Cleaning Concrete for Coating: This practice includes surface cleaning the concrete to remove grease, dirt and loose material prior to the application of coatings. Procedures include vacuum cleaning, air blast cleaning, water cleaning, detergent water cleaning and steam cleaning.

DESIGNED TO PERFORM sherwin-williams.com/resin-flooring 10-28-21_acc

Removal of bond inhibiting contaminants: This includes, but is not limited to, removal of oils, grease, wax, sealers, curing compounds, laitance, salts and any other hydrocarbon-based materials. This will ensure that a good bond takes place between the resinous flooring and the concrete substrate.

Removal of adhesives, mastics and membranes: In many retrofit projects, existing tile, VCT or sheet goods are being replaced with polymer flooring systems. Removal of the floor finish will often leave a layer of some type of mastic, adhesive or membrane. In thin applications, these materials can often be completely cleaned up by shotblasting the concrete. In thicker applications, the steel shot will tend to bounce, requiring additional preparation with the use of grinding equipment.

A simple method to ensure you have sound concrete is to test the pH. The chemistry of concrete is alkaline in nature.

Normal concrete should be in the range of 11-13. Most of the contaminants mentioned are neutral to acidic in nature.

After preparation, test the floor in multiple locations using distilled water and the pH paper. If the pH is 10 or lower, additional preparation will be required to ensure a good bond. In areas where the contaminants cannot be removed, the contaminated concrete must be removed and replaced as in Step 2 above.

CAUTION: Decontamination methods that introduce large amounts of water may contribute to moisture-related problems as referenced in APPENDIX A.

4. �Creation of surface profile can be accomplished by a number of methods, each utilizing a selection of tools, equipment and materials to accomplish the intended purpose. Selection is dependent upon the type of surface to be prepared and the type of system to be installed. In addition, floors, walls, ceilings, trenches, tanks and sumps each have their own particular requirements. The type and thickness of the selected polymer system also plays an important role in the selection process. Regardless of the method selected or tools employed, we must provide a surface that will accept the application of polymer-based products and allow the secure mechanical bond of the polymer to the concrete. The type of service the structure will be subjected to will also help to define the degree of profile required. The surface profile is the measure of the average distance from the peaks of the surface to the valleys as seen through a cross-sectional view of the surface of the concrete.

SHERWIN-WILLIAMS HPF SYSTEM CSP 1 CSP 2 CSP 3 CSP 4 CSP 5 CSP 6

Resuflor™ Grind and Seal

Resuflor Vent-E

Accelera™ S

Crylaflor™ Shield

Resuflor Aqua systems

Resuflor Gard systems

Resuflor NMP Performance EV

Resuflor Performance HPS

Resuflor Performance HTS

Resuflor Topcoat FX

Resuflor Topcoat Metallic II

Resuflor Topcoat SDE

Resuflor Topcoat SDU and

SDU EV

Accelera B, C, Q, HB, HC and HQ systems

All Crylaflor systems except Crylaflor Shield

All Hybri-Flex™ systems

Poly-Crete™ SLB

Resuflor Deco Flake systems

Resuflor Deco Quartz systems

Resuflor Gard SL

Resuflor Mechanical Room systems

Resuflor Shop Floor systems

Resuflor TopFloor systems

SofTop™ systems

Cemlack™ Terrazzo

Poly-Crete MD, MDB, MDC and MDQ systems

Resuflor Terrazzo TG

Cemlack UM

Poly-Crete WR

Resuflor Screed systems

Poly-Crete HF

5. �Repair of surface irregularities including bugholes, spalls, cracks, deteriorated joints, slopes, areas near transition zones such as around drains and doorways, etc., must be repaired prior to the placement of the polymer system and/ or the system must be designed to offset the thickness of the irregularities. For removal and replacement information and materials, refer to Step 2 above. For bugholes and other minor surface irregularities, fill with epoxy quick patch Resuflor 3500, Resuflor 3513, Resutile 4700 Instant Patch Resin, Poly-Crete MD, WR, UM or other approved Sherwin-Williams HPF patching products. For treatment of cracks and joints, refer to the section below entitled CRACK ISOLATION. For additional questions, contact the Technical Service Department or your local sales representative for specific recommendations.

Source: International Concrete Repair Institute

METHODS OF SURFACE PREPARATION

Depending upon conditions of the concrete, one or more methods of surface preparation may be required. It is common for decontamination to precede mechanical preparation, and if necessary a second decontamination to follow.

CAUTION: The use of high-pressure water jetting will introduce large amounts of water, which may contribute to moisture-related problems as referenced in APPENDIX A. Surfaces to receive the bonded polymer system must be inspected after the surface is prepared to ensure that the substrate is sound and structurally durable. Areas found to be unsound or non-durable must be removed and replaced as described in Step 2 above. Dust or other deleterious substances not removed after the initial surface preparation must be vacuumed, leaving the surface dust free and clean.

Other surface preparation methods are mentioned in ADDITIONAL SURFACE PREPARATION REFERENCES below.

CRACK ISOLATION

The performance of elastomeric products such as Resuflor 3555 or Resuflor EOC internally flexible epoxy requires a relatively uniform dry film thickness to resist drying shrinkage and thermal movement of the concrete while maintaining a seamless bridge or seal over the concrete. Therefore it is critical that all mortar splatter, protrusions, ridges, penetrations or sharp projections in the surface of the concrete be ground smooth or otherwise made smooth, in addition to the normal surface preparation outlined above.

Prior to application of an elastomeric system, control/contraction joints, construction joints and cracks should be sealed with the selected system flexible sealant, i.e., Resuflor 3580 joint and crack filler. This coating should extend a minimum of 6" on either side of the joint or crack. The entire surface area should then receive the specified crack isolation system.

Isolation and/or expansion joints should be detailed in accordance with the plans and specifications of an architectural or engineering design professional for the type of structure being considered. Consult the Technical Service Department for the proper selection and use of isolation materials and the potential use of fiberglass scrim cloth for additional crack bridging capabilities. Please refer to our crack and joint details documents.

NOTE: Sherwin-Williams High Performance Flooring systems can be applied to a variety of substrates if the substrate is properly prepared. Preparation of surfaces other than concrete or steel, such as wood, concrete block, brick, quarry tile, glazed tile, cement terrazzo, vinyl composition tile, plastics and existing polymer systems, can be accomplished to receive bonded polymer sealers, coatings or toppings. For questions regarding a substrate other than concrete or steel, or a condition not mentioned in this Guideline, contact the Technical Service Department prior to starting the project.

ADDITIONAL SURFACE PREPARATION REFERENCES

Important and relevant information on surface preparation of concrete is available by referencing the following codes, standards and guidelines.

ADDITIONAL SURFACE PREPARATION REFERENCES

AMPP

Association for Materials Protection and Performance, 800 Trumbull Drive, Pittsburgh, PA 15205, (412) 281-2331

• SSPC-SP 13 Surface Preparation of Concrete

• � �SSPC-TU 2/NACE 6G197 Design, Installation, and Maintenance of Coating Systems for Concrete

Used in Secondary Containment

ICRI

International Concrete Repair Institute, 38800 Country Club Drive, Farmington Hills, MI 48331, (248) 848-3809

• �Technical Guideline No. 310.2, “Selecting and Specifying Concrete Surface Preparation for Sealers, Coatings, and Polymer Overlays.” Includes visual standards to act as a guide in defining acceptable surface profiles for the application of industrial coatings and polymer floor toppings.

• �Technical Guideline No. 03730, “Guide for Surface Preparation for the Repair of Deteriorated Concrete Resulting from Reinforcing Steel Corrosion”

ASTM

American Society for Testing and Materials, 100 Barr Harbor Drive, West Conshohocken, PA 19428-2959, (610) 832-9585

• ASTM D4258 “Practice for Surface Cleaning Concrete for Coating”

• ASTM D4260 “Standard Practice for Acid Etching Concrete”

• ASTM D4261 “Practice for Surface Cleaning Unit Masonry for Coating”

• �ASTM D4262 “Test Method for pH of Chemically Cleaned or Etched Concrete Surfaces”

APPENDIX A: TESTING FOR MOISTURE VAPOR EMISSION FROM CONCRETE

Excess moisture in concrete can produce harmful effects of discoloration, interruption of the polymerization of products, and delaminating of non-permeable resinous systems. Sources of moisture fall into three distinct categories: moisture present at the surface prior to or during application, moisture within the concrete that attempts to escape during and after application, and a distinct source of moisture in intimate contact with the concrete that provides a continuous supply of moisture. Avoiding moisture-related problems and understanding the options available for remediation once they occur is important. Detecting moisture in concrete may be accomplished by employing a number of methods briefly described below:

ASTM F2170-19a – Standard Test Method for Determining Relative Humidity in Concrete Floor Slabs Using in situ Probes — The test method, modeled after the process used in Europe for several years, requires drilling holes at a diameter of 5/8" to a depth equal to 40% of the slab’s thickness. The hole is then lined with a plastic sleeve, capped and allowed to acclimate for 72 hours. The probe is placed in the sleeve, allowed to equilibrate for 30 minutes, and then readings are recorded.

Acceptable relative humidity readings for substrates receiving non-permeable flooring are 80% or lower. Testing should take place in an acclimated building and is required to equal three tests in the first 1,000 square feet, with one additional test per each additional 1,000 square feet of concrete slab surface. This test method is less subject to conditions occurring at the concrete surface that may influence calcium chloride test results. This method only defines existing moisture content of the sample and cannot address moisture vapor transmission.

ASTM D4263 – Standard Test Method for Indicating Moisture in Concrete by the Plastic Sheet Method — This qualitative method will indicate the presence of moisture movement, but it will not quantify the amount of moisture movement and is only useful in determining whether additional testing is required.

ASTM F1869-23 – Standard Test Method for Measuring Moisture Vapor Emission Rate of Concrete Subfloor Using Anhydrous Calcium Chloride Moisture Emissions Test — This ASTM test must be conducted over raw exposed concrete which has been exposed to the environment for at least 24 hours. A quantitative evaluation is conducted wherein the anhydrous calcium chloride container and contents are pre-weighed on a gram scale, allowed to remain in its container with the lid removed, and the container placed under a sealed dome to prevent loss of moisture for a period of 60-72 hours.

Three tests are required for the first 1,000 square feet, with one additional test for every 1,000 square feet or fraction thereafter. These results are quantified as the rate of moisture vapor transmission expressed as pounds per 1,000 square feet of surface area per 24 hours.

Sherwin-Williams High Performance Flooring has adopted a commonly accepted value for application of polymer coatings or toppings to be not more than 3 pounds of moisture per 1,000 square feet per 24 hours.

Moisture content and moisture movement are merely snapshots in time of dynamic conditions within the concrete. Moisture vapor movement is dependent upon the relationship between temperature and humidity of the two adjacent environments — in this case, the internal environment of concrete and the external environment of the air surrounding the concrete.

The Moisture Vapor Test Kit values will not be useful in predicting possible problem areas unless the tests are conducted in the environment in which the structure will be used. The air temperature and humidity around the concrete during the test should be the same air temperature and humidity that will be in place during the useful life of the structure. Contact the Technical Service Department if there are any questions concerning the use of the test kits or interpretation of the results.

To successfully and predictably reduce moisture vapor emission rates, apply one of the following remediation systems:

• Poly-Crete SLB, MD, MDB, HF

• Hybri-Flex systems

• Resuflor Aqua MCS

• Resuflor Vent-E

• Resuprime™ MVB, MVP, MVP3

Consult with the Technical Service Department for specific recommendations and utilize in accordance with application instructions. For slabs with potential moisture issues, utilizing systems that are designed to accommodate moisture movement from the slab such as Poly-Crete SLB, Resuflor Aqua, Resuflor Vent-E and Resuprime MVB, MVP or MVP3 may be the most cost-effective alternative. Whenever moisture issues present themselves on a project, document the conditions, inform the owner representative and consult with Sherwin-Williams High Performance Flooring Technical Service personnel.

NOTE: Concrete curing is the chemical process that gives concrete strength and the industry standard for curing concrete is 28 days. This is not always sufficient time to allow excess moisture to leave a concrete slab, and may cause issues with a non-permeable flooring installation. To minimize moisture-related disbondment when installing Sherwin-Williams High Performance Flooring non-permeable resinous flooring systems, Calcium Chloride and/or Humidity tests should be run to document the presence of moisture in the slab.

DEW POINT CALCULATION CHART (FAHRENHEIT)

RELATIVE

HUMIDITY

AMBIENT AIR TEMPERATURE °F

20 30 40 50 60 70 80 90 100 110 120

90 18 28 37 47 57 67 77 87 97 107 117

85 17 26 36 45 55 65 75 84 95 104 113

80 16 25 34 44 54 63 73 82 93 102 110

75 15 24 33 42 52 62 71 80 91 100 108

70 13 22 31 40 50 60 68 78 88 96 105

65 12 20 29 38 47 57 66 76 85 93 103

60 11 19 27 36 45 55 64 73 83 92 101

55 9 17 25 34 43 53 61 70 80 89 98

50 6 15 23 31 40 50 59 67 77 86 94

45 4 13 21 29 37 47 56 64 73 82 91

40 1 11 18 26 35 43 52 61 69 78 87

35 -2 8 16 23 31 40 48 57 65 74 83

30 -6 4 13 20 28 36 44 52 61 69 77

TESTING

Testing for an Existing Sealer

Test to see if the floor is “sealed” by using the Water Break Test; please refer to ASTM 3191. If the poured water forms into droplets, then an existing sealer and/or paint may exist on the surface and must be removed by diamond grinding, steel shot blasting or other mechanical methods.

Salt Contamination Testing

Salt-contaminated slabs that contain steel reinforcement are very susceptible to corrosion of the reinforcing steel. As the steel corrodes, it expands, causing cracking, delamination of concrete and any toppings bonded to it, and eventually, structural failure of the slab. Obvious signs of chloride or salt contamination are spalled concrete with exposed, rusted, reinforcing steel. Please refer to the Floor Evaluation Guidelines document on our website to assist in determining the condition of the concrete. Core analysis is recommended to determine the depth of soluble ion contamination which may contribute to osmotic blistering and floor system failure. Sherwin-Williams High Performance Flooring offers in-house core testing using ion chromatography technology. Refer to the Sherwin-Williams High Performance Core Analysis Program on our website for more information.

METHODS OF SURFACE PREPARATION

Diamond Grinding

Diamond grinding is another preferred choice for preparing concrete for polymer floor systems. Diamond grinders are floor grinders equipped with diamond abrasives. With multiple grit options available, they are capable of achieving a wide range of concrete surface profiles appropriate for most resinous flooring systems. Additionally, diamond grinding is used for mechanically profiling and removing existing coatings and adhesives. Immediately after diamond grinding, vacuuming is required to remove all dust from the substrate.

Shot Blasting

Shot blasting is an excellent method for surface preparation of concrete for most polymer floor installations. Shot blast equipment utilizes an alloy wheel spinning at high speeds to throw small steel particles at the substrate in a controlled, dry, 99% dust-free operation. This process removes surface contamination, adds profile and vacuums the concrete clean in one process.

The size and angularity of shot, along with the travel speed of the unit, can be adjusted to determine the degree of the surface profile. Because shot blasting is a dry preparation process, it allows the installation to begin immediately after completion of prep (surface must be dry before blasting). Shot blasting will also identify weak areas in the surface of the concrete.

Hand Tool

Hand tool preparation consists of the use of mechanical tools and equipment designed to abrade or chip away the surface of the concrete. Common tools available include chipping hammers, handheld diamond grinders and concrete crack chasing saws. These tools are typically used to make keyways and prepare edges against walls and columns.

TYPES OF SUBSTRATES

Fiber-Filled Concrete

Fiber-filled concrete must be burned with a propane weed burner, swept and vacuumed perfectly clean, and then primed.

When primer has completely cured, the floor must be sanded and tack ragged (This step may not be necessary for thick resurfacing systems).

Quarry/Ceramic Tile

Quarry/ceramic tile has been successfully resurfaced on many projects without the removal of the tile and setting bed. A site investigation along with cores through the entire slab will help identify the type of setting bed, the existence of any waterproofing membranes, additional toppings, or other unusual existing conditions. Water trapped within the floor will create long-term sanitation and performance problems.

If the tile is well bonded and placed over an unsaturated latex setting bed, the floor may be resurfaced. Please consult with a Sherwin-Williams Technical Service Representative to determine appropriate mechanical surface prep method, fillers and products.

Existing Epoxy Coating/Resurfacer

Existing seamless floors may be resealed or…