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
Architects | Oct 20, 2022
Woolpert acquires Sheehan Nagle Hartray Architects, global experts in mission critical design
Woolpert has acquired Sheehan Nagle Hartray Architects, a full-service architecture firm that specializes in mission critical and technically challenging projects, interior design and predesign services for commercial, civic and education clients. SNHA has offices in Chicago and London.
Mixed-Use | Oct 20, 2022
ROI on resilient multifamily construction can be as high as 72%
A new study that measured the economic value of using FORTIFIED Multifamily, a voluntary beyond-code construction and re-roofing method developed by the Insurance Institute for Business & Home Safety (IBHS), found the return can be as high as 72%.
40 Under 40 | Oct 19, 2022
Meet the 40 Under 40 class of 2022
Each year, the editors of Building Design+Construction honor 40 architects engineers, contractors, and real estate developers as BD+C 40 Under 40 awards winners. These AEC professionals are recognized for their career achievements, passion for the AEC profession, involvement with AEC industry organizations, and service to their communities.
BAS and Security | Oct 19, 2022
The biggest cybersecurity threats in commercial real estate, and how to mitigate them
Coleman Wolf, Senior Security Systems Consultant with global engineering firm ESD, outlines the top-three cybersecurity threats to commercial and institutional building owners and property managers, and offers advice on how to deter and defend against hackers.
Designers | Oct 19, 2022
Architecture Billings Index moderates but remains healthy
For the twentieth consecutive month architecture firms reported increasing demand for design services in September, according to a new report today from The American Institute of Architects (AIA).
Building Team | Oct 18, 2022
Brasfield & Gorrie chairman’s home vandalized by anti-development activists
Activists vandalized the home and vehicles of Miller Gorrie, chairman of Birmingham-based Brasfield & Gorrie, in protest of a planned $90 million, 85-acre police, fire and public safety training center in Atlanta.
Mixed-Use | Oct 18, 2022
Mixed-use San Diego tower inspired by coastal experience and luxury travel
The new 525 Olive mixed use San Diego tower was inspired by the coastal experience and luxury travel.
University Buildings | Oct 18, 2022
A carbon-neutral-ready university campus opens in Hong Kong
In early September, the Hong Kong University of Science and Technology (HKUST) officially opened its new, KPF-designed campus in Nansha, Guangzhou (GZ).
Market Data | Oct 17, 2022
Calling all AEC professionals! BD+C editors need your expertise for our 2023 market forecast survey
The BD+C editorial team needs your help with an important research project. We are conducting research to understand the current state of the U.S. design and construction industry.
Codes and Standards | Oct 17, 2022
Ambitious state EV adoption goals put pressure on multifamily owners to provide chargers
California’s recently announced ban on the sale of new gas-powered vehicles starting in 2035—and New York’s recent decision to follow suit—are putting pressure on multifamily property owners to install charging stations for tenants.
