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 | Aug 1, 2023
Nonresidential construction spending increases slightly in June
National nonresidential construction spending increased 0.1% in June, according to an Associated Builders and Contractors analysis of data published today by the U.S. Census Bureau. Spending is up 18% over the past 12 months. On a seasonally adjusted annualized basis, nonresidential spending totaled $1.07 trillion in June.
Healthcare Facilities | Aug 1, 2023
Top 10 healthcare design projects for 2023
The HKS-designed Allegheny Health Network Wexford (Pa.) Hospital and Flad Architects' Sarasota Memorial Hospital - Venice (Fla.) highlight 10 projects to win 2023 Healthcare Design Awards from the American Institute of Architects Academy of Architecture for Health.
Office Buildings | Aug 1, 2023
Creating a nurturing environment: The value of a mother’s room in the workplace
Since becoming an architect, Rebecca Martin of Design Collaborative has drawn a mother’s room into numerous projects. But it wasn't until she became a mom that she fully appreciated their importance in the workspace.
Digital Twin | Jul 31, 2023
Creating the foundation for a Digital Twin
Aligning the BIM model with the owner’s asset management system is the crucial first step in creating a Digital Twin. By following these guidelines, organizations can harness the power of Digital Twins to optimize facility management, maintenance planning, and decision-making throughout the building’s lifecycle.
K-12 Schools | Jul 31, 2023
Austin’s new Rosedale School serves students with special needs aged 3 to 22
In Austin, the Rosedale School has opened for students with special needs aged 3 to 22. The new facility features sensory rooms, fully accessible playgrounds and gardens, community meeting spaces, and an on-site clinic. The school serves 100 learners with special needs from across Austin Independent School District (ISD).
MFPRO+ New Projects | Jul 27, 2023
OMA, Beyer Blinder Belle design a pair of sculptural residential towers in Brooklyn
Eagle + West, composed of two sculptural residential towers with complementary shapes, have added 745 rental units to a post-industrial waterfront in Brooklyn, N.Y. Rising from a mixed-use podium on an expansive site, the towers include luxury penthouses on the top floors, numerous market rate rental units, and 30% of units designated for affordable housing.
Affordable Housing | Jul 27, 2023
Houston to soon have 50 new residential units for youth leaving foster care
Houston will soon have 50 new residential units for youth leaving the foster care system and entering adulthood. The Houston Alumni and Youth (HAY) Center has broken ground on its 59,000-sf campus, with completion expected by July 2024. The HAY Center is a nonprofit program of Harris County Resources for Children and Adults and for foster youth ages 14-25 transitioning to adulthood in the Houston community.
Hotel Facilities | Jul 27, 2023
U.S. hotel construction pipeline remains steady with 5,572 projects in the works
The hotel construction pipeline grew incrementally in Q2 2023 as developers and franchise companies push through short-term challenges while envisioning long-term prospects, according to Lodging Econometrics.
Sustainability | Jul 27, 2023
USGBC warns against building energy code preemptions, rollbacks
In a recent editorial, the USGBC cited a growing number of U.S. state legislators who are “aiming to roll back building energy code standards and/or preempt local governments from advancing energy-efficient building codes.”
Resiliency | Jul 27, 2023
'Underground climate change' can damage building foundations, civil infrastructure
A phenomenon known as “underground climate change” can lead to damage of building foundations and civil infrastructure, according to a researcher at Northwestern University. When the ground gets hotter, it can expand and contract, causing foundations to move and sometimes crack.
