Attachment_0006-_Additional_Q_and_A_0003.pdf

Solicitation 140P5423R0006 ‐ Rehab San Antonio Guardhouse – Additional Questions & Answers

1. Can the government please specify the required thickness, R‐Value, and composition of the board insulation?

1. Thickness: 3‐inches

2. R‐Value: R‐15

3. Composition: Extruded‐Polystyrene Board

2. Can the government please specify the required thickness for TPO and brand?

1. Required thickness for TPO: 80 mils.

2. Brand: Firestone, ULTRAPLY, or brand equivalent that meets or exceeds the Firestone manufacturer’s product warranty.

3. For better protection of the roofing system, it is recommended to install a flashing on the edge of the existing concrete parapet. However, it is also possible to install a flat flashing on top of the parapet and not visible from the sides of the building. Please advise.

Install a flat flashing on top of the parapet and not visible from the sides of the building.

Provide waterproof sealant to the flashing.

4. The roofers raised their concerns on pressure washing after the existing roofing system is removed. This might bring water into spaces below. The contractors on the site believe this might not be necessary to complete the project. Please advise.

To mitigate concerns on pressure washing after the existing roofing system is removed.

Inspect the condition of the surface, repair, clean and remove any residue of the previous material installed.

5. To better understand what lays under the exterior layer on the roof, and to learn how much it is required to haul off the site, the subs suggested core drilling please advise. Assume 3‐inches of the existing Danosa waterproofing system for purposes of this proposal.

6. Will the required insulation board (taper) be fully adhered or mechanically installed? The required insulation board shall be Fully Adhered.