ESBD_425273_1749079361655_RFP 809-25-0018 TSHM Roof Replacement - Attachment A - Scope of Work.pdf

State Preservation Board

REQUEST FOR PROPOSALS

RFP No. 809-25-0018

FOR

Bullock Texas State History Museum Roof Replacement

ATTACHMENT A: SCOPE OF WORK

RFP No. 809-25-0018 Bullock Texas State History Museum Roof Replacement

ATTACHMENT A: SCOPE OF WORK

DETAILED DESCRIPTION OF SERVICES REQUESTED

The Bullock Texas State History Museum, constructed in 2001, is located at 1800 Congress Ave. in Austin, Texas. The building encompasses 4 floors and 17 distinct roof areas.

The State Preservation Board (SPB) is requesting pricing for the selective demolition and replacement of portions of the existing roof. The project includes installing reinforced gypsum coverboard and a single-ply roofing membrane over the modified bitumen roof (MBR). The MBR surface will be properly prepared to ensure a clean, sound, smooth, and dry substrate for the new roofing system. Additionally, the project includes repairs and recertification of the lightning protection system.

The Work summarized in this Scope of Work is provided as a convenience and may not be inclusive of all specified work.

Refer to the Drawings & Photographs for a graphical representation of the work locations, as well as the relationship and orientation of components. These materials illustrate the final configuration of the work but do not depict the intermediate steps, methods, or execution processes. The Drawings & Photographs provide typical details but are not intended to display every detail comprehensively.

Any item referenced in the Project Manual & Specifications but not depicted in the Drawings & Photographs, or shown in the Drawings & Photographs but not mentioned in the Project Manual & Specifications, shall be considered equally valid as if included in both.

The selected Contractor shall complete the work, as listed in the attached drawings and specifications in this Attachment A – Scope of Work, Attachment B – Drawings & Photographs, and Attachment C -Project Manual & Specifications.

DISCLOSURES

A. The following disclosures are listed for Contractor’s convenience and may not be exhaustive or comprehensive. This partial summary of disclosures shall not be construed as representing that either Engineer or Owner believes there is no other information that would be valuable to Contractor, nor shall it relieve Contractor of its obligation to perform its own independent study before submitting a Bid.

1. Avoid performing work over the IMAX theatre during show times (afternoon and late evening).

WORK INCLUDED

Base Bid: Furnish all materials, labor, equipment, and services necessary for and incidental to the execution and completion of the following Work.

1. Section 013001 – Administrative Requirements

a) At completion of Work, engage a specialty subcontractor to repair and recertify the lightning protection system.

2. Section 024114 – Selective Roof Demolition

a) Perform moisture scan of each roof area. Supplement scans with roof cores to confirm moisture content of insulation is acceptable to the manufacturer for roof membrane installation.

b) Replace insulation at locations found to have excessive moisture content.

c) Cut back roof membrane at blisters and repair surface with new membrane to provide a smooth and flat substrate.

d) Remove roof membrane and insulation at roof drain sumps as shown on Drawings.

e) Remove existing walk pads and roof membrane patches. Repair surface with new membrane to provide a smooth and flat substrate for coverboard.

f) Remove base flashings and cant strips from the parapet walls, roof area dividers, and equipment curbs.

g) Disassemble and store counterflashing. Remove and store metal wall panels and coping as needed to install new roof system. Reinstall counterflashing, wall panels, and coping removed during the Work.

h) Disconnect and reconnect electrical connections, including the light fixtures, as needed to facilitate the Work. Move and reposition concrete blocks used to support light fixtures.

i) Disconnect and reconnect HVAC condensers as needed to facilitate the Work.

j) Dispose of existing splash blocks and existing wood sleeper supports.

3. Section 060111 – Rough Carpentry

a) Replace damaged or deteriorated wood cants, curbs, nailers, and blocking as required by job conditions, these specifications, and as shown on Drawings.

4. Section 075213 – Modified Bitumen Roof Repairs

a) Patch the surface of the existing roof membrane with APP sheet membrane as needed to provide a uniform surface for the coverboard installation.

5. Section 075416 – Fully-Adhered KEE Membrane Roofing

a) Install fully-adhered coverboard over existing roof membrane. Installation includes surface preparation required by manufacturer.

b) Install mechanically attached coverboard to vertical wall surfaces as shown on Drawings or required by job conditions.

c) Install fully-adhered KEE membrane.

i. Provide roof system attachment to meet FM wind uplift resistance criteria as shown on Drawings.

ii. Work includes the application of membrane flashings, edge and penetration details, and roof accessory materials.

d) Install walk pads as shown on Drawings.

6. Section 076201 – Flashing and Sheet Metal

a) Provide pre-formed KEE-coated sheet metal flashing for integrating the membrane at complex geometric conditions.

b) Install KEE-coated metal at roof edge details as shown on Drawings.

c) Replace damaged copper coping at locations shown on Drawings.

d) Install galvanized sheet metal counterflashings at HVAC units, exhaust fan curbs, and other roof-top mechanical equipment.

e) Apply copper cover plates adhered with silicone sealant as shown on Drawings (in annotated photographs) and as needed to patch holes in existing flashing.

f) Install manufactured pipe supports.

g) Replace concrete splash blocks.

7. Section 079201 – Sealant Installation and Replacement

a) Replace failed sealant at coping and counter-flashing joints.

b) Install sealant at Z-flashing gaps.

8. Section 221426 – Roof Drains

a) Replace primary and overflow drains and accessories. Include all materials necessary for completion of the replacement.

COMMENTARY

A. Where used in the Project Manual & Specifications, "Commentary" provides supplemental, nonmandatory information to assist Contractor to interpret the Project Manual & Specifications.

Commentary is set off from the text of the specifications by a box, and is not part of the Contract Documents.