BP / CBRE
Project: BP-702
Square footage: 24,900 square feet
Scope: Recovery of existing roof system
To meet demand in research, BP upgraded and remodeled the entire 24,900 square feet of Building 702 with the latest in technology. To accommodate the new research equipment, the installation of over 200 new roof top curbs and projections were required. This extensive construction caused irreversible damage to the existing PVC roof membrane. Understanding the age and condition of the roof, it was critical to install a new system to protect the equipment below. Due to Preservation's procedures, unblemished campus installation record, and knowledge of campus policy, Preservation was awarded the contract to complete the roofing project.
With site policy restricting the use of open flames and hot asphalt while requiring the use of a non-slip membrane with redundant protection, a two-ply modified system adhered in cold adhesive was the perfect system choice. The project scope included the removal of the existing single-ply roof membrane to allow inspection of the underlying insulation. Once all wet insulation was replaced, a layer of Johns Manville ¼" Invinsa board was adhered to the insulation in cold adhesive, covered by the modified membrane.
The recovery project was scheduled to start late in the "roofing season" to allow for completion of the curb installation phase. Due to the temperature sensitivity of the membrane adhesive, Preservation was challenged to complete the project before winter weather prevented installation. To meet the deadline, Preservation outlined and maintained an aggressive, expedited schedule to utilize every possible work day. Extended days, mandatory weekends, and larger crew size ensured the damaged roof membrane was replaced timely to ensure the building remained water tight. With this commitment, Preservation was able to install the recovery roof before winter, protecting the equipment and allowing the remodeling project to continue uninterrupted.
Key Points:
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Expedited construction schedule
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Deadline met
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Building remained water tight
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Remodeling continued uninterrupted
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Norway Central Office
Project: AT&T / Gilbane Building Company / TENG architects
Square footage: 75,000 s.f.
Scope: Partial removal and replacement of the Main switch station roof and office area
The Norway Central Office project was an example of Preservation Services complete service ability to its customers. Preservation Services worked with Gilbane Building Company and TENG Architects to design a roofing scope that upgraded earlier building design flaws, enhanced the wind up lift capability due to its rural location, and installed a twenty year roof system in the most practical manner. PSI designed a customized bid that decreased the project cost by half without compromising the roofs integrity or any of the necessary design upgrades. Significant technology is housed at this building, therefore it was imperative that PSI work vigilantly without any disruption to the operations.
The main roof comprised 41,700 square feet of the whole project, and had an existing tapered "All weather Crete" insulation covered by a built-up roof, two PVC single-ply recover roofs, and a ballasted EPDM roof at the top. Part of PSI value engineering was to leave the sound "All weather Crete" and remove all assemblies above it to avoid the high cost of replicating this material’s slope and r-value function. We made this recommendation only after extensive testing was done to the "All Weather Crete" to make sure it was suitable to remain. In the course of this testing, it was noticed that bottom 12' was saturated and needed to be removed. PSI began the project by removing the bottom 12' down to the deck and installing new tapered insulation. The remaining area of the roof was removed down to the all weather Crete and 1" isocyanurate (R-value of 6), was installed, followed by the application of a single layer of 60 mil TPO membrane throughout. This assembly was secured in place with the existing ballast river rock. Westile ballast pavers were fortified around the entire perimeter to provide additional wind uplift capability due to the buildings rural location. PSI's sister company Fieldstone Building Services was utilized to add 12 new scuppers through the soffit of the building to enhance positive drainage on the roof area, as it was previously restricted by inadequate size and spacing of the existing drains.
The design of the office roof area again utilized the existing tapered insulation once it was found suitable to remain. Due to its different existing roof composition, it was decided that a new two-ply John Manville APP modified roof system over 2" (R-12.1) Isocyanruate insulation and 1/2" Dura board was best suited for this section. PSI added additional gutters and downspouts to take advantage of the slope of the existing tapered slope and prevent ponding water. Due in large part to PSI assistance, the roofing project was kept below the customer's budget with multiple upgrades that enhanced the complete function of the roof system.
US Equities
Project: 600 Block of N. Michigan Ave
Square footage: 17,500 s.f.
Scope: Complete roof removal and replacement with Johns Manville Two ply Self-Adhering modified, R-24 insulation assembly, and ELM’s Liquid membrane coating.
Among numerous applicants, Preservation Services was the chosen contractor for the roof replacement project of the 600 block of N. Michigan Ave in Chicago, a building housing some of the city’s most notorious names in retail, including Nike Town, Garmen, and Cole Hahn.
Though this project was relatively small in scale, this 17,500 square foot roof area proved a worthy test, with multiple levels and complicated logistics. As the address infers, among the primary challenges faced by the Preservation Services team was completing a roofing project in the heart of Chicago’s Magnificent Mile retail district.
All operations were seamless for the public at street level, however, each night, all hoisting and disposal operations were executed behind the scenes from the alley just east of Michigan Avenue. This required the construction of a 90’ alley canopy with two trap doors and extensive hoisting provisions to the multiple areas of the roof. Despite the magnitude of this and other elements necessary to the project, all operations were executed without disturbance to any tenants or customers amidst the beginning of a busy Christmas shopping season.
The owner and property manager sought out a roof system that would meet the criteria of the 2008 City of Chicago energy code for insulation R-value and reflectivity. The roof system selected for this project was R-24 insulation with two plies of self adhering modified bitumen membrane, which was then coated with Green Product’s ELMS® (Environmental Liquid Membrane System) for reflectivity.
Additionally, the Johns Manville Clean Bond ® self adhering modified bitumen membrane technology was chosen to give the customer an energy efficient, redundant, traditional two ply system without the use of open flame, and as a result—occupants and retail patrons unknowingly enjoyed an odor free installation.
Our sister company, Fieldstone Building Services preformed a complete masonry scope during the roofing project. Their work included tuckpointing of failing mortar joints, multiple brick replacement, and expanding scuppers to allow for better drainage of the roof system.
Key Points:
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Logistics of the project: 90’ Alley canopy, night work, multiple levels
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Self adhering modified technology
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City of Chicago criteria installed (R-24 insulation and reflectivity)
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Project completed during the Christmas shopping season on the Magnificent Mile Retail Area.
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PSI completed the project on time and on budget to the delight to owner and property management.
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No complaints during the whole project.
NSA - National Security Agency
We are pleased to announce the completion of a very difficult, time sensitive project for the NSA in Augusta, Georgia.
The project included the removal and replacement of a three month old roofing system installed by an unqualified contractor.
We had to remove and replace 5" of brand new insulation that was saturated to the point of dripping when it was picked up. The facility was a NSA (National Security Administration) data center located on the grounds of the Fort Gordon Army Base in Augusta.
The contractor that installed the roofing system had never installed a roof on a facility this size and did not know how to do it properly. We received an emergency call on Monday morning at 7:00 a.m. and mobilized one of our teams to be on-site and ready to go within 24 hours.
The existing roofing system had leaked so badly in this new facility that the interior drywall had to be replaced two times and the delivery date for the facility was now 30-40 days behind schedule. Our team of experts worked 15 hour days, seven days a week and not only made up the lost time, but delivered the completed roof ten days early!
LaSalle Bank Building; Chicago
- Multi-roof replacement program on this landmark facility; showcasing ELMS® City of Chicago Code compliant energy efficient roofing system
- On-going Maintenance Services
- Fiscal Planning & Strategies
AT&T National Dial Routing Center
- Complete roof replacement and façade repairs to this ultra-sensitive data center that routes, manages and secures all AT&T phone services nationwide.
- Preservation Services was selected given the strength of our performance history on data centers, telecommunications and highly secured facilities.
- With the owners' exposure and reputation at a premium, Preservation Services performs its 450th roof replacement project for AT&T. This partnership reflects the ultimate in vendor trust and is a testament to Preservation Services' enduring value and quality execution.
1 E. Wacker; Chicago
- 45 Story high rise required exceptional safety and owner coordination. Installed for Jones Lang LaSalle, Preservation Services' expertise was sought out to successfully deliver this methodically thought out project on-time and on budget.
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