B1249_roof_QandAs_4Sep19.pdf

1. SECTION 01 35 35 Page 5

1.5.4 Storm Water Pollution Prevention

Permit coverage must be obtained prior to site clearing of an area for projects disturbing greater than or equal to one acre of land

Question: Since the construction for this project is well under one acre, is SWPPP necessary?

2. SECTION 01 35 35 Page 6

1.5.5 Edwards Aquifer Recharge And Contributing Zones.

Question: If SWPPP is not necessary, would requirements listed in 30 TAC §213 relating to the Edwards Aquifer be necessary?

3. It was discussed at the pre-bid job walk, there is no asbestos in the existing roofing materials or other materials that should effect this project.

Question: Does an Asbestos inspection need to be completed, prior to removing the existing roofing and or wall caps and other flashings?

4. The submittal register, provided with solicitation FA301619BA007, lists Lead Inspection reports.

Question: Does an Lead inspection need to be performed? and do any of the other lead based criteria need to be addressed?

ANSWERS for 1-4 above:

1. No SWPPP required under an acre, however provision will need to be provide to protect any run off if materials are stored for a long period.

2. No not required but still take precautions to protect the environment

3. No inspection required for asbestos, survey on file indicate NAD (no asbestos detected)

4. The area of concern for lead, is the existing pipe vents (boot/flashing) contractors to address on demo and disposal phase of work

5. The specifications call to use ¼” tapered insulation on the roof to create proper drainage. Will any additional base layers of insulation be required to meet any particular R-Value? Yes base layers and tapered insulation is required to include fastening patterns as per manufacture

6. The roofing system is specified as a 4 ply roofing system which consists of 3 plies of type #6 felts and a torched applied cap sheet. Will the cap sheet need to be an ultra-white to meet any R-Value/energy codes? Yes ultra white

7. Summary of Work Section 01 11 00 does not indicate a requirement for Lightning Protection. It did not appear the existing roof had lightning protection. Please confirm whether the project will require a Lightning Protection system to be installed? This project does not required lightning protection

8. Summary of Work Section 01 11 00 states to remove the existing roof system down to the roof substrate. The existing roof substrate is understood to be wood deck. Please confirm that we are not to replace the existing wood substrate and that if any of the wood is damaged/rotted a change will be issued for repair. Bidders should include at least 10% in their bid for typical roof replacement

9. During the site visit, rotted lumber was observed at the soffit. Summary of Work Section 01 11 00 paragraph 1.2.1 states to install new soffit which will be a small section of metal around the building. Please advise if we should replace the wood currently located at the soffit in full or assume an allowance for a certain quantity of material repair in our bid. Bidder should include a minimum 181 LF of lumber in the bid to insure anchoring of new soffit

10. Will a laydown area for materials be provided in the adjacent parking lots? Yes

11. Will the laydown area require a fence and will fence screen be required? Yes

12. Section 01 35 26 of the specifications states that the SSHO may also serve as the QC

Manager but that the SSHO cannot also serve as the Superintendent. Based on the small size of this project would it be acceptable to permit a single individual to serve onsite as Superintendent, QC, and SSHO? Yes, bidders should reflect this item on the bid

13. Is it acceptable for the SSHO and/or QC to be an employee of the subcontractor? No

14. Section 07 51 13 1.8.2 of the specifications states the installer must warranty the roof for a minimum of 10 years. Industry standard is typically 2 years. Is a 2-year installation warranty acceptable? No, government is specifying a minimum of 10 years

15. Can a sheet metal specification be provided for the metal flashings? Match existing, the awarding contractor is to submit on AF3000 for flashing and counter flashing Are we to use steel or aluminum for the flashings? Steel Galvanized

16. Is it the intent of the SOW to provide ¼” slope requirement in the insulation? Yes since there are gutters on both sides

17. Is there a minimum R-value requirement for the insulation? Minimum R value 11.4

18. Is the cap sheet required to be energy-star? No

19. Section 07 51 13 Paragraph 1.4.3 states, “Do not install non-rated systems except as approved by the Contracting Officer. Submit licensed engineer's wind uplift calculations and substantiating data to validate any non-rated roof system.” This roof with the existing substrate is expected to be a non-rated system. Please confirm that the government will require this data from a licensed engineer. This data is not required from a licensed engineer