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
| Jan 3, 2012
Gensler: 'The One Firm Firm'
The giant architecture firm succeeds by giving each of its more than 3,000 employees the opportunity for career growth and professional leadership.
| Jan 3, 2012
Rental Renaissance, The Rebirth of the Apartment Market
Across much of the U.S., apartment rents are rising, vacancy rates are falling. In just about every major urban area, new multifamily rental projects and major renovations are coming online. It may be too soon to pronounce the rental market fully recovered, but the trend is promising.
| Dec 29, 2011
OSHA enforcing new fall hazard standards
OSHA is enforcing its new fall protection standards, as evidenced by a recent crackdown in New York.
| Dec 29, 2011
Decision not to fireproof the new World Trade Center Transportation Hub criticized
Some criticized the decision, reasoning that the structure could be a terrorist target.
| Dec 29, 2011
Seismic safety in question at thousands of California public schools
California regulators responsible for enforcing earthquake safety laws have failed to certify more than 16,000 construction projects in California public schools, increasing the risk that some projects may be unsafe, according to a state audit report.
| Dec 29, 2011
GreenWizard offers cloud-based LEED credit management, assessment
The company recently began offering companies the ability to run assessments for design credits, in addition to traditional product-specific LEED credits.
| Dec 27, 2011
Clayco awarded expansion of Washington University Data Center in St. Louis
Once completed, the new building addition will double the size of the data center which houses sophisticated computer networks that store massive amounts of genomic data used to identify the genetic origins of cancer and other diseases.
| Dec 27, 2011
Ground broken for adaptive reuse project
Located on the Garden State Parkway, the master-planned project initially includes the conversion of a 114-year-old, 365,000-square-foot, six-story warehouse building into 361 loft-style apartments, and the creation of a three-level parking facility.
| Dec 27, 2011
Nova completes $60M Clearwater Conference Center
Comprising an entire city block, the 450,000 sq. ft. facility features over 400 meeting rooms, six theaters, a full-service health spa, complete with an indoor running track, and a commercial kitchen that can efficiently accommodate over 1,000 diners
| Dec 27, 2011
BD+C's Under 40 Leadership Summit update
The two-day Under 40 Leadership Summit continued with a Leadership Style interactive presentation; Great Solutions presentations from Under 40 attendees; the Owner’s Perspective panel discussion; and the Blue Ocean Strategy presentation.
