The community of Winchester, Ind., was in desperate need of a new roof for its aging high school. Teachers and students were coexisting in an interior environment that was wet, humid and had a repulsive smell. The school board met with a number of people, including a conventional roof trade association and an architectural firm that specialized particularly in flat roof work.
In January 2008, they elected to go with another flat roof on the high school.
However, the community was split over whether to use another flat asphalt roof or to use a sloped standing seam metal roof. In March 2008, Metal Roof Consultants attended a school board meeting and presented a sloped metal retrofit roof as an alternative to tearing off the existing roof and replacing it with another flat roof. The retrofit metal roofing system allows the existing roof to stay in place and constructing a new roofing system over the top of it.
The challenge
To provide a long-lasting roof that would permanently fix severe leakage issues associated with the existing flat roof on Winchester High School.
The solution
After the presentation by Metal Roof Consultants, it was decided that a retrofit metal roof system would be the best solution for the existing problem. MBCI, the leading manufacturer of metal roof and wall systems, was approved as the supplier for both the framing system and metal roof system for the 108,000-sf project. Smarrelli Construction was chosen to do the installation. The contract price was approximately $1.6 million, slightly less than the original estimate to remove and replace the existing flat roof.
The MBCI NuRoof Retrofit Roof System was installed over the existing roof’s framing members to create a sloped plane. Six inches of unfaced fiberglass insulation were installed directly over the existing roof. This raised the insulating value of the roof from R-3.5 to R-22.5, which provided significant energy savings. It also allowed the existing roof to release its moisture through the glass insulation into the ventilated air in the new roof cavitty.
Once the framing system was in place, a BattenLok HS standing seam metal roof was installed over it. This option allowed school to stay in session while the new roof was installed. The metal roof was an Energy Star qualified Cool Roof color, which, when properly used considering the environment and the slope of the roof, can reduce energy consumption because of its ability to reflect and emit the sun’s energy, providing significant cost savings.
Additionally, this solution eliminated the need to deposit the existing roof into the local landfill, which recent statics show that 7 to 10% of U.S. landfill space has gone to roofing waste over the last 40 years (ADPSR 1998-2007 Corps of Engineers Study). Metal roofing also allows for little to no maintenance. The contract price was $1.6 million, less than the original estimate to remove and replace the existing flat roof. MBCI also guarantees that the roof will not leak for a minimum of 20 years.
The retrofit system
The NuRoof Retrofit Framing System utilizes light-gauge (16 ga. to 12 ga.) steel framing, which is installed directly over the existing roof’s framing members to create a sloped plane. Regardless of whether your roof substrate is steel, wood or concrete, MBCI’s NuRoof system can be employed to satisfy the building owner’s requirements. MBCI has the experience required to design the retrofit framing system that will comply with the original load requirements of the existing roof.
The existing roof’s physical footprint, framing system and other rooftop conditions will most likely control the new roof’s geometry. A low-slope application (¼:12 to 2:12) is typically driven by economy and designed to discharge rainwater from the roof. High-slope applications (greater than 2:12) are also designed to improve and update the look of an existing building in conjunction with improving the performance of the roof.
Once a NuRoof framing system has been installed, one of MBCI’s standing seam metal roofs is typically installed, creating a ventilated attic space.
Standing seam metal roof systems
MBCI offers two types of standing seam metal roof systems--vertical leg and trapezoidal--which are of the most durable and weathertight roof systems available in the industry. Both systems can be used for new construction or retrofitting an existing building.
The vertical leg standing seam roof panels from MBCI blend the aesthetics of an architectural panel with the strength of a structural panel. These panels have earned several UL uplift ratings, assuring the reliability of performance. They also provide flexibility to meet design challenges. Each of these systems is designed to be installed over open framing. BattenLok HS is a vertical leg system.
Trapezoidal standing seam panels are available as a snap-together system or field-seamed system. They allow for strength, durability and weatherability. The standing seams are three inches above the lowest part of the panel, well above the water level as it flows off the roof. With a recommended minimum slope of ¼:12, the trapezoidal systems can be used on all types of construction, including metal, masonry or wood. +
Related Stories
Market Data | Feb 24, 2021
2021 won’t be a growth year for construction spending, says latest JLL forecast
Predicts second-half improvement toward normalization next year.
Events Facilities | Feb 22, 2021
Weiss/Manfredi designs $250 million expansion for Longwood Gardens
The project will transform 17 acres of the core conservatory area.
Healthcare Facilities | Feb 18, 2021
The Weekly show, Feb 18, 2021: What patients want from healthcare facilities, and Post-COVID retail trends
This week on The Weekly show, BD+C editors speak with AEC industry leaders from JLL and Landini Associates about what patients want from healthcare facilities, based on JLL's recent survey of 4,015 patients, and making online sales work for a retail sector recovery.
Multifamily Housing | Feb 10, 2021
The Weekly show, Feb 11, 2021: Advances in fire protection engineering, and installing EV ports in multifamily housing
This week on The Weekly show, BD+C editors speak with AEC industry leaders from Bozzuto Management Company and Goldman Copeland about advice on installing EV ports in multifamily housing, and advances in fire protection engineering.
Architects | Feb 5, 2021
Heartwell named CEO at CallisonRTKL; Thompson appointed firm's first COO
Kim Heartwell named CEO at CallisonRTKL; Harold Thompson appointed COO.
Healthcare Facilities | Feb 5, 2021
Healthcare design in a post-COVID world
COVID-19’s spread exposed cracks in the healthcare sector, but also opportunities in this sector for AEC firms.
Building Owners | Feb 4, 2021
The Weekly show, Feb 4, 2021: The rise of healthy buildings and human performance
This week on The Weekly show, BD+C editors speak with AEC industry leaders from Brookfield Properties, NBBJ, and UL about healthy buildings certification and improving human performance through research-based design.
AEC Tech | Jan 28, 2021
The Weekly show, Jan 28, 2021: Generative design tools for feasibility studies, and landscape design trends in the built environment
This week on The Weekly show, BD+C editors speak with AEC industry leaders from Studio-MLA and TestFit about landscape design trends in the built environment, and how AEC teams and real estate developers can improve real estate feasibility studies with real-time generative design.
Multifamily Housing | Jan 27, 2021
2021 multifamily housing outlook: Dallas, Miami, D.C., will lead apartment completions
In its latest outlook report for the multifamily rental market, Yardi Matrix outlined several reasons for hope for a solid recovery for the multifamily housing sector in 2021, especially during the second half of the year.
Modular Building | Jan 26, 2021
Offsite manufacturing startup iBUILT positions itself to reduce commercial developers’ risks
iBUILT plans to double its production capacity this year, and usher in more technology and automation to the delivery process.
