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
Regulations | Oct 4, 2023
New York adopts emissions limits on concrete
New York State recently adopted emissions limits on concrete used for state-funded public building and transportation projects. It is the first state initiative in the U.S. to enact concrete emissions limits on projects undertaken by all agencies, according to a press release from the governor’s office.
Architects | Oct 4, 2023
Architects and contractors underestimate cyberattack risk
Design and construction industry firms underestimate their vulnerability to cyberattacks, according to a new report, Data Resilience in Design and Construction: How Digital Discipline Builds Stronger Firms by Dodge Construction Network and content security and management company Egnyte.
Luxury Residential | Oct 2, 2023
Chicago's Belden-Stratford luxury apartments gets centennial facelift
The Belden-Stratford has reopened its doors following a renovation that blends the 100-year-old building’s original architecture with modern residences.
Giants 400 | Oct 2, 2023
Top 30 Data Center Architecture Firms for 2023
Corgan, HDR, Gensler, Page Southerland Page, and HED top BD+C's ranking of the nation's largest data center sector architecture and architecture/engineering (AE) firms for 2023, as reported in Building Design+Construction's 2023 Giants 400 Report.
Market Data | Oct 2, 2023
Nonresidential construction spending rises 0.4% in August 2023, led by manufacturing and public works sectors
National nonresidential construction spending increased 0.4% in August, according to an Associated Builders and Contractors analysis of data published today by the U.S. Census Bureau. On a seasonally adjusted annualized basis, nonresidential spending totaled $1.09 trillion.
K-12 Schools | Oct 2, 2023
4 design strategies for successful K-12 magnet schools
Clark Nexsen's Donna Francis, AIA, Principal, and Becky Brady, AIA, share four reasons why diverse K-12 magnet schools require diverse design.
Architects | Sep 28, 2023
Nashville architecture firm ESa adds 14 principals
ESa has announced that 14 new principals have been added to the firm’s leadership. “As ESa continues to grow, we are excited to celebrate our newest ESa principals. These individuals embody the characteristics of a quality leader and have shown great leadership in client and team member relationships, project management and mentoring roles,” said Kevin Harney, ESa vice president and principal.
Construction Costs | Sep 28, 2023
U.S. construction market moves toward building material price stabilization
The newly released Quarterly Construction Cost Insights Report for Q3 2023 from Gordian reveals material costs remain high compared to prior years, but there is a move towards price stabilization for building and construction materials after years of significant fluctuations. In this report, top industry experts from Gordian, as well as from Gilbane, McCarthy Building Companies, and DPR Construction weigh in on the overall trends seen for construction material costs, and offer innovative solutions to navigate this terrain.
University Buildings | Sep 27, 2023
Top 170 University Building Architecture Firms for 2023
Gensler, CannonDesign, Page Southerland Page, SmithGroup, and Ayers Saint Gross top the ranking of the nation's largest university sector architecture and architecture/engineering (AE) firms, as reported in Building Design+Construction's 2023 Giants 400 Report.
Affordable Housing | Sep 25, 2023
3 affordable housing projects that serve as social catalysts
Trish Donnally, Associate Principal, Perkins Eastman, shares insights from three transformative affordable housing projects.
