21-442 - VA Castle Point Roofing - Pre-Bid Questions.pdf
PDF 185 KB Posted
- Attached to
- Y1DZ--620A4-22-103 Replace Roofs Castle Point Federal contract opportunity
- Solicitation number
- 36C24226B0004
About this file
This is a Pre-Bid Request for Information (RFI) submission and response document for contract 620A4-22-103 concerning roof replacement and façade repair. The document addresses six pre-bid questions submitted by a potential contractor regarding design specifications and scope clarifications.
The contracting officer clarified that the basis of design specifies 60 mil EPDM membrane roofing, which will not be substituted with TPO or other alternatives due to its proven longevity and superior weathering characteristics. Regarding insulation, the contract requires flat insulation on structurally sloped roof areas meeting minimum slope requirements (1/4" per 12"), with tapered insulation applied only to areas below required slope, at vertical wall intersections, and at vertical equipment intersections to ensure positive drainage. The officer confirmed that mechanical equipment must be raised to maintain a minimum 18-inch distance above the finished roof per detail 6/AS-302, and vent piping must extend to a minimum 12 inches above the finished roof. Door thresholds and roof finish assemblies must comply with manufacturer recommendations to maintain warranty coverage. Additionally, the contracting officer clarified that roof areas 1 and 2, shown in the submitted photograph, are not included in the project scope and do not appear in the contract documents, despite mention during the site walkthrough. Bidders must reference contract drawings AS-100, 16-AS-101 to 21-AS-101, and AS-300 to AS-302 for complete project requirements.
View the file
Other files for this federal contract opportunity
Show all 20
On GovTribe
Work with this file on GovTribe
- Download the original file
- Contacts named in this file
- Similar government files
- Ask GovTribe AI about this file
Text version
Pre‐Bid RFI Submission for 620A4‐22‐103 Roof Replacement and Façade Repair
1. While reviewing the drawings, I noƟced that the roofing system calls for tapered insulaƟon at 1/4” per 12”, even though the exisƟng structure consists of a pitched concrete deck. IncorporaƟng a full tapered system over an already sloped deck will significantly increase the finished roof thickness — potenƟally bringing the total assembly to approximately 18–19 inches at the high points. Is this accurate of just meeƟng R‐33 value would be, ok?
Response:
Follow contract documents for roof replacement, drawings AS‐ 100, 16‐AS‐101 to 21‐AS‐
101 and AS‐300 to AS‐302. Provide flat insulaƟon on exisƟng structurally sloped roof areas at or above min. required slope (1/4” on 12). Provide tapered insulaƟon on roof areas less than required slope, at verƟcal wall intersecƟons and verƟcal equipment intersecƟons (crickets) to provide posiƟve drainage of min. ¼” on 12 to roof drains and scuppers.
2. This added height will likely require raising the exisƟng curbs and door thresholds to maintain the minimum 8” flashing height, which would add both material and labor costs to the project.
Response:
Mechanical equipment must be raised to provide minimum 18” distance above finished roof as shown on detail 6/AS‐302. Vent piping must maintain minimum 12” above finished roof, extend piping as necessary. Door thresh‐hold and roof finish assembly must meet manufacturers recommendaƟons to provide manufacturer’s warranty.
3. The specificaƟons currently call for a reinforced EPDM system. As an alternaƟve, we can also provide a TPO roofing system which is beƩer and at a lower cost. This can provide added durability and seam integrity over Ɵme.
Response:
The Basis of Design on the contract documents is 60 mil EPDM. EPDM membrane was chosen for its proven longevity, as a long‐term soluƟon, and for having weathering and material characterisƟcs that outperform other roof membranes. TPO will not be accepted as an a substanƟally equivalent opƟon.
4. We would be happy to provide a formal alternate price proposal for the TPO system if that is something you would like to consider.
Response: See quesƟon #3 response above.
5. Is white EPDM the only opƟon you are accepƟng, or is TPO roof fully adhered system accepted?
Response: See quesƟon #3 response above.
6. In the image below, are areas 1 and 2 included in the scope? The drawings do not menƟon these areas, but I remember on the walk it was said to include them.
Response: Roofs indicated in photo provided above as 1 & 2 are not part of the scope and are not shown on the contract documents.
File details come from the government source that posted it. Updated .