B825 REPAIR AND SEAL FLOORS RFI DOCUMENT.pdf

B825 REPAIR AND SEAL FLOORS

W50S8526BA004

RFI’S

• Carpet replacement floor area square feet, 1,325 SF

• Epoxy/high-performance coating, 3,588 SF

• Resilient cove base replacement, LF 770.57 LF

• Expansion-joint sealing, LF The rooms we did, we sealed around the outside walls.

But once the carpet is up there might be more location requiring sealing. This would be impossible to determent without the carper being up.

• Crack repair/sealing, LF This would be impossible to determent without the carper being up. Once the carpet is up you will be able to see where the cracks are.

• Carpet Type

The SOW references Section 09 68 16, “Sheet Carpeting”; however, the specified product is Patcraft Prado I0317, Color 00595 Obsidian, which the manufacturer's product data identifies as a 24" × 24" carpet tile.

Please confirm that carpet tile, rather than broadloom/sheet carpet, is required.

Yes, this is 24” x 24” carpet tile.

• Carpet Tile Installation Pattern

If Patcraft Prado I0317 carpet tile is required, please identify the required installation pattern. The manufacturer's product data identifies Quarter Turn, Random, Monolithic, Brick, and Ashlar as available installation methods.

If no specific pattern is required, please confirm that the Contractor may select an installation pattern consistent with the manufacturer's recommendations and the contract requirement to maintain the pattern parallel to walls and borders.

Follow manufactures specifications and recommendations.

• Limits of Flooring Work

Please confirm that the color-coded carpet and epoxy areas shown on the contract floor-plan drawing represent the complete limits of flooring replacement/coating work.

Also confirm whether existing transition strips/moldings at the affected flooring transitions are to be removed and replaced with new.

Yes, the Floor Plan Drawing represents the complete limits of flooring replacement and coating work.

• Construction Phasing / Occupied Building

Please confirm whether Building 825 will remain occupied and operational throughout construction.

If so, please identify any required room-by-room phasing, sequencing restrictions, maximum number of rooms that may be taken out of service concurrently, or rooms/functions that must remain operational at all times.

Please also identify whether temporary relocation of affected occupants will be coordinated by the Government.

Yes, there is no way to do this otherwise without a different building to designate to, please keep in mind that if there are VOC concerns this is a place where active treatment (USCG) is actively going through. Relocation would require a plan depending on the contract.

• Gypcrete, Joint and Crack Repair Existing Conditions

The SOW identifies deteriorated expansion-joint sealant, visible cracks, and areas of crumbling gypcrete; however, quantities or limits of substrate deterioration do not appear to be provided.

Has the Government performed any investigation or testing identifying the extent of deteriorated gypcrete, expansion-joint repair, or crack repair? If so, please provide the available information.

If concealed deterioration is discovered after removal of existing flooring that exceeds conditions reasonably observable during bidding, please confirm how additional substrate remediation will be addressed.

The Government has not performed any investigation or testing identifying the extent of deteriorated gypcrete, expansion-joint repair, or crack repair.

• Moisture Testing Requirements

The specifications require substrate moisture verification and manufacturer-recommended bond/moisture testing for carpet installation and establish moisture limitations for high-performance coatings.

Please confirm whether any additional quantitative moisture testing is required, such as ASTM F1869 calcium-chloride testing or ASTM F2170 in-situ relative-humidity testing, prior to installation of carpet tile or epoxy/high-performance coatings.

Testing Standard & Requirements: Yes, quantitative moisture testing is required prior to installing carpet tile or epoxy/high-performance coatings. The Contractor shall perform both ASTM F2170 (In-Situ Relative Humidity (RH) Testing) and/or ASTM F1869 (Calcium Chloride Moisture) Vapor Emission Rate Testing) in accordance with the specific finish and adhesive manufacturers’ written instructions.

Pre-Installation Protocol:

Testing must be conducted under fully acclimated, operating HVAC conditions. A minimum frequency of three (3) test locations for the first 1,000 sq. ft., plus one (1) additional test per every 1,000 sq. ft. thereafter must be performed for each distinct concrete slab area.

Compliance & Reporting: The Contractor shall submit all official moisture test logs, pH test results, and core slab RH readings to the Contracting Officer prior to material deployment. If measured levels exceed the maximum allowable threshold set by the carpet tile adhesive or epoxy coating manufacturer (typically >75–80% RH or >3 lbs/1,000 sq. ft./24 hrs), installation shall not proceed until an approved Moisture Vapor Barrier/Mitigation System is submitted and installed. Compliance & Reporting:

The Contractor shall submit all official moisture test logs, pH test results, and core slab RH readings to the Contracting Officer prior to material deployment. If measured levels exceed the maximum allowable threshold set by the carpet tile adhesive or epoxy coating manufacturer (typically >75–80% RH or >3 lbs/1,000 sq. ft./24 hrs), installation shall not proceed until an approved Moisture Vapor Barrier/Mitigation System is submitted and installed.

• Transition Material / Attic Stock

Attic Stock requirements for the carpet tile and cove base are clearly identified in the SOW. Please confirm whether attic stock is required for transition strips/moldings and, if so, identify the required quantity.

Attic Stock requirements for the carpet tile and cove base are clearly identified in the SOW. Please confirm whether attic stock is required for transition strips/moldings and, if so, identify the required quantity

Required Quantity: The Contractor shall provide 5% of the total installed linear footage for each distinct type, profile, and color of transition strip/molding installed on the project. In no case shall the provided attic stock for any individual profile/color be less than one (1) full, standard manufacturer length (e.g., 12-foot standard length). Delivery & Storage: All transition attic stock must be delivered in original, unopened manufacturer packaging, clearly labeled with the manufacturer name, profile style, color code, and project installation area.

• Ventilation and Isolation Requirements for Occupied Areas

The SOW requires forced ventilation during epoxy application and drying, and also requires continued ventilation associated with carpet installation. Because Building 825 is expected to remain at least partially occupied during construction, please clarify the Government’s requirements for isolating work areas from adjacent occupied spaces.

Containment Barriers: The Contractor shall install temporary, dust- and vapor-tight plastic sheeting barriers (minimum 6-mil flame-retardant poly sheeting) sealing off all doorways, corridors, and open penetrations between active work zones and adjacent occupied areas prior to commencing any floor prep, epoxy application, or carpet installation. Negative Air & Air Handling Systems: Active work zones must be placed under negative pressure relative to adjacent occupied areas using negative air machines (air scrubbers equipped with HEPA and activated carbon/charcoal filters for VOC odor control) exhausted directly to the exterior of the building. HVAC Isolation:

The Contractor shall temporarily seal off all supply air diffusers and return air grilles within the work zone to prevent odor, dust, and volatile organic compound (VOC) migration through the building’s central HVAC system. Work Scheduling & Off-Hours Application: High-VOC applications (such as epoxy primers, adhesives, and sealers) or heavy dust-generating floor prep must be scheduled during off-peak hours or weekends if adjacent spaces are actively occupied, maintaining continuous ventilation through the full manufacturer-recommended cure/drying period.

• Concrete/Gypcrete Sealer Product

The SOW requires a water-based, zero-VOC concrete/gypcrete sealer with several specific performance characteristics, including approximately 4-inch penetration, hydrostatic-pressure resistance, soil-gas/radon reduction, and compatibility with subsequent flooring systems.

Please identify the basis-of-design product intended to meet these requirements. If no specific product is intended, please confirm whether an equivalent product meeting the overall performance intent will be acceptable.

Basis of Design: The specification requirements—specifically a water-based, zero- VOC, deep-penetrating reactive sealer (capable of up to 4-inch deep pore absorption, hydrostatic pressure resistance, and soil-gas/radon reduction without compromising secondary flooring adhesion)—are modeled around deep-penetrating reactive silicate/siliconate sealers.