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
| Jun 18, 2013
Report: HVAC occupancy sensors could slash building energy demand by 18%
Researchers at the DOE's Pacific Northwest National Laboratory conclude that significant energy savings can be achieved by varying ventilation levels based on the number of people in a given space.
| Jun 18, 2013
Turner report: Activity in urban markets driving construction cost increases
Turner Construction Company announced that the Second Quarter 2013 Turner Building Cost Index – which measures costs in the non-residential building construction market in the United States – has increased to a value of 859. This reflects a 1.18% increase from the First Quarter 2013 and 4.00% yearly increase from the Second Quarter 2012.
| Jun 17, 2013
First look: Austin to get first high-rise since 2003
Developer Cousins Properties broke ground on the 29-story Colorado Tower in downtown Austin, Texas, the city's first high-rise building since Cousins' completed the Frost Bank Tower a decade ago.
| Jun 17, 2013
DOE launches database on energy performance of 60,000 buildings
The Energy Department today launched a new Buildings Performance Database, the largest free, publicly available database of residential and commercial building energy performance information.
| Jun 14, 2013
First look: Callebaut's eye-popping Möbius building for Taichung arts center
French design firm Vincent Callebaut Architectures has released renderings of "Swallow's Nest," an entry in a design competition for a new cultural center, fine arts museum, and public library in Taichung City, Taiwan. The building, based on a Möbius ring, swirls around a central "Endless Patio."
| Jun 14, 2013
Purdue, industry partners test light steel framing for seismic safety
A partnership of leading earthquake engineering researchers from top U.S. and Canadian universities and design professionals from the steel industry have begun the final phase of a three-year project to increase the seismic safety of buildings that use lightweight cold-formed steel for their primary beams and columns.
| Jun 13, 2013
7 great places that represent excellence in environmental design
An adaptive reuse to create LEED Platinum offices, a park that honors veterans, and a grand national plaza are among the seven projects named winners of the 2013 Great Places Awards. The Environmental Design and Research Association recognize professional and scholarly excellence in environmental design, with special attention paid to the relationship between physical form and human activity or experience.
| Jun 13, 2013
Richard Smith joins Cannon Design Science + Technology practice
Cannon Design, an internationally ranked architectural, engineering and planning firm, is pleased to announce Richard Smith has joined the firm as a Principal. Smith joins the leadership team for Cannon Design’s Science + Technology (S&T) practice and will focus on developing strategies for immediate and long-term growth.
| Jun 13, 2013
Winfrey hired as Health and S&T studio head for SmithGroupJJR Dallas
SmithGroupJJR, one of the nation’s largest architecture, engineering and planning firms, has hired David Winfrey, AIA, LEED AP BD+C, as leader of its Health and Science & Technology Studio at its Dallas, Texas office.
| Jun 13, 2013
WorkingBuildings acquires Specialty Operations Solutions
The WorkingBuildings Companies, a leading provider of comprehensive Owner-based solutions for the built environment, announces the acquisition of Specialty Operations Solutions (SOS), a national provider of research and laboratory services.
