S02 - Attachment 2 - Statement of Work - Garland Roof Replacement - Final (12-3-2020 YMR).docx

Garland Roof Replacement Statement of Work (SOW) Reroof and Reinsulate Roofing Systems at the Garland Veterans Affairs Medical Center (VAMC) 2300 Marie Curry Rd. and 900 Shiloh Rd. Garland, Texas

Project Number: 549-157R

Project Description: This project is a design-built project to address the reroofing of the VA Medical Center at Garland at 4 selected roofing areas: Medical Office Building approx. 22,000 sq. ft., the Warehouse approx. 20,000 sq. ft., Roof A approx. 43,000 sq. ft. and ED roof approx. 12,000 sq. ft. The project is to reroof and reinsulate these existing BUR roofing systems. The reroofing will involve multiple steps: 1. Conduct an infrared aerial survey of the VAMC at Garland to determine the current roof leaks along with generating CAD files of the roofing systems at both locations. 2. Provide temporary patching to minimize roof leaks and further interior damages, 3. Create plans to remove existing roofing, flashings, insulation and ACM, 4. re-insulate, replace parapet caps and flashing, renovate scuppers, HVAC curbs, utility penetrations and reroof with a TPO roofing membrane and associated mastics, and flashings. This plan will include access scaffolding, material storage, job site security, handling and disposing of ACM, general disposal of existing BUR and flashings and caps. The design plan may be staged into 3 phases to allow for roofing to start while the plans are being developed for later phases.

Design

1. The architectural and engineering design services will consist of the following:

Detailed plans by professional registered engineers/architects. Architect, electrical and mechanical are to conduct site surveys to develop plans. Architect/Engineers are to field verify conditions. The design of the project is to follow the VA Master Specifications.

Architectural Cover sheet/ index of drawings /project information/ professional stamps Overall Roof plan: roof plan is to provide accurate roof plans illustrating all structures, utilities, scuppers, drains, HVAC curbed and shielded penetrations, parapets, maintenance pathway pads, and square footages for each roof and linear measurements of parapets, walls etc. These plans are to identify what roofing system is on each roof and what system will replace the existing system. The plan is to provide an overall legend of all the roofing systems identifying each roof by number, roof square footage, type of roof terminations, type of roofing existing, new roofing and demo plans.

Existing parapets scuppers, drains, penetrations of existing and new installations.

Flashing and caps per roof illustrating installation and relationship to parapets, transition walls, and roof edges. Insulation type, sloping diagram, type of adhering methods to deck and type of adherence to insulation

AE will provide a study for roofs over two stories for anchor points through roofing system to structural for future window washing/repair services. AE will design, and contractor install anchor points.

The plan will provide complete specifications for the roofing, flashing, parapet caps, sealant, drainage materials, pitch pan equivalents, scuppers, anchors, insulation systems and adhering systems. All materials used are to meet VA master specifications.

Mechanical

Mechanical symbols, notes and schedules

Mechanical HVAC related reroofing plan as needed per roof. Curbing, penetrations, anchoring maintenance pathways, gas lines etc.

Electrical

Electrical notes, symbols and legends

Electrical plan Each roof shall illustrate all existing electrical utilities and how the electrical equipment will be addressed as it relates to the roofing system.

Plumbing

Roof drainage systems

A plan is to identify the plumbing drainage diagram of existing piping that roofing system

Each roof plan will show existing and required modifications to the drainage system to compensate for the new roofing and insulation systems.

Each roof drainage system will be reviewed for optimum roof drainage and amount of drainage with overflow drains.

General

Maintain as-built drawings throughout construction period

Provide as-built drawings at end of the project

Design and Construction schedule

1.0 Design Phase 1--11 weeks (submittal process may start during the design period)

1.1 65% 6 weeks

1.2 95% 9 weeks

2.0 Start construction after Phase 1 design is completed--2 to 3 weeks.

3.0 Design for Phase 2 and 3 to take an average of 8 weeks per phase.

4.0 Construction for all phases is eight (8) months.

5.0 Total time for entire project is 365 calendar days after Notice To Proceed (NTP)

General Requirements

1. Contractor and his subcontractors will comply with OSHA requirements, VA NTX Construction Safety Policies, VA Green Environmental Management Systems Policies, and the Safety guidelines in the VA Master Specifications.

2. Provide a full-time construction superintendent. A superintendent must be on site while any work is being done.

3. Contractor will not have access to the buildings. All access must be by a safety inspected scaffolding stairway system. Roofing materials are to be craned from and to the higher elevation structures. Contractor is responsible to secure access to the roof and general storage area.

4. Provide a dumpster to be located at a pre-designated location. Contractor may need to fence off dumpster to avoid others from using the dumpster. The storage area location will be provided at the NTP meeting. Contractor will broom clean and remove debris daily. Contractor will be responsible to maintain a clean work area. During demo and other work, all drains will be guarded to avoid debris from going onto the roof drains. After the roofing is complete, the contractor will camera and if required clean out drain and down spout lines. to the main city storm water lines or end of the exterior drain. Contractor must make sure drains are open and available to remove water from roofs at all time.

5. Contractor must be aware of current and pending weather conditions to avoid debris from coming off the roof and potential water infiltration and to protect the facility in the case of inclement weather. Contractor is to fence off the adjacent exterior ground level to avoid debris falling on pedestrians and vehicles.

6. Normal working hours will be Monday thru Friday 7:00 AM to 5:00 PM.

7. Weekend and after hours may not be done unless advance approval of the Contracting Officer is received.

8. Contractor will provide a final cleaning of each roof system. The work is to be scheduled as to avoid walking on finished roofs.

9. Contractor will provide a daily work log.

10. A/E firm associated with project will provide close out documents.

11. Contractor will supply submittals to A/E firm. A/E will relay submittals to COR with review information. COR and A/E firm will jointly approve submittals

12. Upon completion and or substantial completion of a roofing section, the contractor will remedy any damages associated with that roofing section. The contractor is responsible for taking photos before during and after each roofing section to record conditions.

13. The contractor will provide a standard manufacturer’s 5-year warranty on workmanship to include leaks and any delaminating of roofing and insulation and a 30 warranty on materials.

14. An asbestos survey is available. If the contractor discovers suspicious materials that might contain asbestos, the contractor is to avoid the material and report the findings to the COR. The contractor is responsible to safely remove the ACM and dispose in a certified dumpsite. The contractor is to hire a professional team to address ACM and the contractor is to submit findings and disposal records to the VA.

15. Lead and mold surveys are also available. OSHA and VA standards apply to the proper methods of removal and if required disposal.

Site Work

1. Contractor will supply OSHA compliant exterior scaffolding stairway. Contractor must gauge work to current and pending weather conditions. Contractor is responsible to repair/replace interior finishes due to flooding caused by missing roofing or clogged drains.

Concrete

1. Concrete saw cutting and core cutting may be a part of this project in adding and or relocating drains and other utilities.

2. The PSI rating of the concrete must meet structural engineer’s standards per VA building codes.

Metals

1. AE is to review and design guard railings along roof edge where technicians will be working on HVAC at least 15 feet from the edge and to provide safety ladders and stairways. Contractor will install OSHA approved rail system (estimated overall railing length is approximately 100 feet and three hatches, ladder/stairways added on this project.

2. All parapet caps will be power coated and sealed to VA specifications. All flashing will be galvanized and to the gauge as specified to VA master specifications. Approximately 3,700 lineal feet of flashing, raised joints between roofing systems, parapet capping and or wall transitions will need to be replaced on this project. If concrete capping is used, the old backer rod and caulk is to be removed and a color matching NP1 or equivalent with new backer rod will be installed.

Thermal and Moisture Protection

1. TPO membrane installation must meet a 30year warranty. The TPO membrane must be at least 80 mills thick and white. Adherence of the insulation and roofing must meet insulation and roofing VA and insulation and roofing material specifications. Bonding of the roofing system must meet roofing manufacturer’s methods to meet 30year roofing warranty.

2. The temporary patching service to reduce existing roof leaks will be based on minimal based repairs to at least stop roof leaks until the patched roofing is replaced.

3. A minimum of R-30 must be met in this roofing project. The insulation used for this project will be rigid insulation.

Plumbing

1. Roof Drain elevations will have to be modified due to the new roofing and insulation. All drains and protective grate lids shall be replaced. The actual count of roof drains needs to be field verified. There are approximately 100 drains on this project. AE shall review the roofs to determine if additional drains and overflow drains are required. It is an estimate that of 20% of the roofs will need additional drainage and the addition of overflow drains.

HVAC

1. Roof ducting and AHU units will have to be removed and replaced for roofing procedures. New curbing and duct work and flashing will be used to re-install AHU units. If the AHU removal is done in occupied hospital areas, the contractor will have to supply temporary air conditioning until units are returned back in service. Curbing and ducting will have to be modified due to increased insulation elevations. Modular HVAC units will have to be blocked and repositioned while demo and replacement is ongoing. Any gas/chilled water lines will also need to be elevated and moved for roofing. Field verification is required to determine the units to be re-positioned.

Electrical

1. Electrical lines will have to be temporarily moved and penetrations reroofed.

If parapet caps need to be replaced where lightening protection is installed, the lightening protection system will have to be dismantled, re-installed and certified by a certified lightening protection firm.

Plans to be reproduced on Revit and transferred to AutoCAD. Specifications are to be produced in Microsoft Word. All specifications including section. All specifications including section 01010 (general requirements) except for specialized or inaccurate specifications shall be edited to conform to VA standards. Current VA Standards and Specifications may be accessed and downloaded on the World Web site @ http://www.cfm.va.gov/. Surveys for mold, lead and asbestos have been done for the VAMC at Garland. These will be included in the package.