Amendment_3_Attachment_16_Final_Q_and_A_0003.pdf
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- Attached to
- Replace Headquarters Roof, Redwood National Park
- Solicitation number
- 140P8424R0008
About this file
This document is a set of Final Questions & Answers (Q&A) related to Amendment 3 of a Request for Proposals (RFP) solicitation for the National Park Service (NPS) to replace the headquarters roof at Redwood National Park. The solicitation is for a contractor to replace the existing adhered modified bitumen roof system on the upper and lower roofs, including related work such as replacing fascia, flashing, gutters, drains, and reconnecting a rooftop solar array. Key details include:
The roof is flat with insulation sloping for drainage, the deck is approximately 1/2" thick plywood, and the contractor will be responsible for disconnecting and reconnecting the solar array. The solicitation is a small business set-aside with a NAICS code of 238160 (Roofing Contractors) and an estimated project value between $250,000 and $500,000. The award is planned for September 2024 with a 9-month period of performance. Contractors are instructed to monitor SAM.gov for any additional amendments prior to the August 30, 2024 offer due date.
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Text version
REDWOOD NATIONAL PARK
REPLACE HEADQUARTERS ROOF
PMIS No. 254973
Solicitation no. 140P8424R0008 Amendment no. 3
Attachment 16, Final Questions & Answers
NATIONAL PARK SERVICE
PACIFIC WEST REGION
8/26/24
The following is the final round of questions& answers for this solicitation.
1. Is the deck sloped or flat?
NPS Answer: Flat roof, with insulation sloping for drainage, see plan.
2. How many stands support the solar array?
NPS Answer: Approximately 18.
3. How tall are the bump-out walls?
NPS Answer: Varies, from 24” to 36”.
4. What is the size of the drains? NPS Answer: Approximately 12” diameter.
5. Is the depth or composition of the roof known?
NPS Answer: Lower roof is hot fluid applied modified bitumen with multiple plies and gravel ballast surface. Upper roof fully adhered modified bitumen system. Depth unknown.
6. What is the location for the laydown yard and mobile office?
NPS Answer: Mobile office location not anticipated, contractor will be responsible to coordinate. Limited laydown space can coordinated with NPS to allow for space in the
NPS fenced parking lot located between 2nd and 3rd streets.
7. What type of access do we have to the attic?
NPS Answer: Attic is accessed from the mechanical wells below the roof popups.
8. Regarding "roof drain replacement" - is the use of a drain insert allowed?
NPS Answer: Bid requirement per Contract Line Item 0011 is for drain replacement.
9. What is the thickness of the roof?
NPS Answer: Assume ½” thick plywood roof sheathing minimum.
10. What type of vapor barrier can be used as shown in detail 1 on A600 (Low Roof Edge
Detail)? NPS Answer: Reference specification 07 27 22, 2.3.C
11. If drain inserts are allowed, which type should be used?
NPS Answer: Bid requirement per Contract Line Item 0011 is for drain replacement.
12. What type of cover board is to be used?
NPS Answer: Reference specification 07 27 22, 2.3.E
13. Is the cover board to be installed using foam adhesive?
NPS Answer: Cover board can be mechanical or adhesive attached. Contractor to provide attachment design in conformance with specifications.
14. Is the spray foam interior insulation to be installed after the roof fasteners are installed?
NPS Answer: Yes.
15. Are all the perimeter metal, counter flashings, and gutters & downspouts to be made of stainless steel?
NPS Answer: Reference specifications for material type requirements.
16. Can the solar panels be left on the roof after the disconnect?
NPS Answer: Contactor is responsible for means and methods of disconnecting and reconnecting the PV system to facilitate new roof installation.
REMINDER TO OFFERORS: As of posting of this Amendment in SAM, any additional questions submitted after the Amendment will not be considered. The
Q&A above is final prior to the solicitation closing date of 8/30/24.
File details come from the government source that posted it. Updated .