15-Addendum 1.pdf

pg. 1

DATE:

ADDENDUM NO. 1

TO: ALL PROSPECTIVE OFFERORS

REFERENCE: IFB 2000004148

TITLE: Gerry Hyland GC Roof-HVAC

DUE DATE/TIME: August 25, 2025 @ 2:00pm

1. The referenced Request for Proposal (RFP) is amended as follows:

Notes for Appendix B- BID TABLE

As part of base price, please include full replacement of all roof drains and assembly, which includes existing body, leader, elbow and ± 1 linear foot of drainpipe. This additional scope should include the assembly embedded in the concrete and below the deck.

Total of 17 drains to be replaced. Note: Drawings call for “Strainer, Flashing Clamp & Garvel Stop removal & replacement ONLY. Refer to Drawing# D101, A101, Detail 6/A501 reference details or illustrations.

2. DUE DATE/TIME:

Changed from August 25, 2025 @ 2:00pm to September 5, 2025 at 2:00PM Est.

3. Responses to inquiries received:

Q.1. Will the testing agency be engaged by the Owner at the Owner’s expense?

A.1. No. This is the responsibility of the awarded contractor.

Q.2. Where is substrate board required in the new roofing assembly?

A.2. Substrate board is not required.

Q.3. Please clarify the intended application method of the new roofing system.

This specification references both cold and hot applications.

A.3. Both will be allowed. Contractor to keep in mind that the building will be fully occupied so placing a kettle would be difficult on the site.

Either cold or hot applied shall meet the required 20 minimum warranty from the manufacturer and a two (2) year installation warranty.

Q.4. Please provide a specification regarding the intended average or minimum

R-value of the new roofing system.

A D D E N D U M

C o u n t y o f F a i r f a x , V i r g i n i a

Docusign Envelope ID: EDF56155-522C-4973-B7B8-24BA09F99307

8/22/2025

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Q.6. Please provide the structural design criteria including components and cladding wind pressures chart required to comply with wind uplift performance requirement

A.6. See attached NRCA roof wind designer for basic requirements.

Contractor’s roofing specialist should verify all requirements with selected manufacturer.

Q.7. Is the building FM-insured? Please confirm the new roofing assembly must be FM-approved with an Assembly #.

A.7. No, County self-insures.

Q.8. Please clarify whether existing roof drain assemblies are to be replaced in their entirety. 6/A501 shows only existing strainers and clamping rings to be replaced, and existing drain bodies embedded in concrete to remain.

A.8. Replace in their entirety.

Q.9. It is likely that the existing sheet metal scupper assembly shown to remain will need to be replaced. Please advise.

A.9. Provide line item cost for sheet metal scupper replacement.

Q.10. In accordance with roofing industry standards and best practices, sheet metal counterflashing is typically “slipped” behind the inside leg of existing coping to remain. Please advise.

A.10. Agreed. If this question is asking about the fasteners set in sealant, if the selected manufacturer will not require them for their 20-year warranty and the material stays in place they would not be required.

Details do show membranes and flashing to be tucked under existing metal flashing.

Q.11. Please indicate the intended location of the equipment platform railing and ladder.

A.11. Please see sheet A103, keynote 2 and enlarged plan referenced on sheet A502.

Q.12. How shall bidders address existing surface-mounted flashing that is disassembled and salvaged but cannot be reinstalled due to end of useful life/normal wear and tear? Please consider establishing an allowance or

ADDENDUM NO. 1

IFB-2000004148

A.4. It is to match the existing insulation height. Per base building record drawings the concrete roof slab is sloped 1/4'” per foot. The only areas that would receive tapered insulation would be crickets.

Existing building has R-16 as minimum.

Q.5. Please provide a specification for the intended cap sheet in the new roofing assembly.

A.5. 2.3 D. Cap Sheet: ASTM D3909/D3909M, asphalt-impregnated and coated, glass fiber cap sheet, with white coarse mineral-granule top surfacing and fine mineral surfacing on bottom surface.

ADDENDUM NO. 1

IFB-2000004148

adding a unit price line to the Bid Table and provide a specification section for Sheet Metal Flashing and Trim.

A.12. Provide line item for Aluminum .050 thickness with Kynar finish to match existing color and profiles for 380 linear feet. This is approximately 50% of the roof coping.

Q.13. It is likely that the existing metal scupper components shown to remain will need to be replaced. Please advise.

A.13. See response to Question 9 above.

Q.14. How shall bidders address existing parapet metal flashing that is disassembled and salvaged but cannot be reinstalled due to end of useful life/normal wear and tear? Please consider establishing an allowance or adding a unit price line-item to the Bid Table and provide a specification section for Sheet Metal Flashing and Trim.

A.14. See response to Question 12 above.

Q.15. Please specify the extent of the certification required for the reinstallation of salvaged lightning protection.

A.15. Where disturbed or where it needs repair as on the upper roof would need to be completed and the system re-certified at end of project.

Q.16. Please specify the extent and locations of overhead protection required for construction.

A.16. Overhead protection would be required wherever and whenever the contractor is lifting construction items to the roof. The building will remain fully occupied during construction. Entry’s should be projected at all times from falling debris. Extent would be dependent on contractors proposed staging and means and methods of the contractor.

Q.17. Please provide core sample documentation and/or as-built drawing A.17. There are not core sample documentation. As built drawings for existing conditions do not exist. This was a proffered building.

Q.18. Please provide the wage scale applicable to the contract.

A.18. Please find attached Department of Labor wage scale.

Q.19. Please outline the phasing plan, if any, required for construction.

A.19. The phasing plan is to be provided by the awarded contractor based on the IFB details and requirements.

Q.20. Please specify the extent of interior protection measures required for construction.

A.20. Please refer to IFB for information about protection requirements.

Q.21. What are the liquidated damages applicable to the contract?

A.21. Liquidated Damage may not apply in this contract.

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A.23. Please refer to the IFB. The project includes replacement of HVAC equipment, BAS work, roof replacement and structural work.

Q.24. Is this a funded project?

A.24. Yes. To maintain a competitive pricing process the funding amount will not be provided.

Q.25. Attachment G para 8. Project Duration and Phasing Page 3 states that substantial completion shall be no later than 26 weeks from NTP.

Exterior work, specifically roof replacement, shall not begin until May 2026 and must be completed no later than Oct 2026. This is about 9 to 10 months from now. Due to volatility of the current market price. Will Govt compensate for the price difference.

A.25. Project is firm-fixed price. It is bidder’s responsibility to ensure they’ve considered and covered market price fluctuations in their bids.

Further should the bidders consider two mobilizations, one for

Mechanical works and one for Roof work. Or the project will be awarded to be executed simultaneously starting from May 2026

It is up to the bidders to determine how they can successfully sequence and coordinate both roof and HVAC work within the timeline provided. This will need to be coordinated with County project management staff ahead of time.

26.Q. Who is the current BA Systems contractor-maintenance. What system is installed.

A.26. Trane SC+

Q.27. Whose responsibility will it be to remove, salvage, and reinstall the existing parapet-mounted cameras?

A.27. Fairfax County

Q.28. HVAC System- What system is installed?

A.28. Please reference construction drawings which show the removal of two (2) exhaust fans, a makeup air unit, and a rooftop unit. Drawings show that new equipment of a similar type will be installed meeting

ADDENDUM NO. 1

IFB-2000004148

Q.22. Please clarify the construction start, period of performance, and construction completion dates. The Attachment G and Solicitation documents contain conflicting information.

A.22. Roof work to be conducted May 1st through October 31st to include completion of all punch list items for an owner acceptance and closeout no later than October 31st.

Q.23. What is the magnitude of construction of the project?

pg. 5 current codes and allowing for better access to the equipment and roof clearances.

Q.29. Whose responsibility will it be to remove, salvage, and reinstall the existing parapet-mounted cameras?

A.29. Fairfax County

Q.30. Please provide Mech As Bult Drawings.

A.30. As built drawings for existing conditions do not exist. This was a proffered building.

Q.31. Please confirm that One person may fill the roles of Superintendent, QC and SSHO.

A.31. The bidder should provide their best proposal to include how they plan to provide the requested labor for the required positions.

Q.32. Please provide laydown crane access area.

A.32. Please refer to provided drawings noting crane access area.

This will need to be carefully coordinated with awarded contractor.

Q.33. Please provide work hours.

A.33. Workhours must meet the Fairfax County Noise Ordinance. Some structural work will require after hours or weekend completion due to excessive noise that would disrupt the business of the county.

Q.34. Please provide HVAC Controls for the Building.

A.34. Trane SC+

Shameema Rahman, CPPB, VCO, VCA Contract Specialist II