School Gives Carlisle Extra Credit for its Energy-Efficient TPO Roofing

March 31, 2005
The Londonderry School in Harrisburg, PA, recently opened its doors at its new facility, ushering in a new era of environmentally friendly considerations in school design. Established in 1971, the school occupied leased space for classes extending from preschool through eighth grade. As the population grew and classroom space became tighter, school board members and staff began plans to construct a new building.Realizing that the construction of a new facility would provide the opportunity to integrate environmental consciousness and affordability in design, the school officials involved with the project systematically studied available options. The result is, in their own words, “a model to challenge and revolutionize traditional thinking in school construction.” After careful analysis, construction materials and methods were selected to help reduce operating costs for energy consumption. This innovative approach qualified the school as a “green” building with the U.S. Green Building Council, and secured a Silver rating from Leadership in Energy and Environmental Design (LEED). LEED is a national standard for developing high-performance, sustainable buildings including educational facilities. Based on well-founded scientific standards, LEED emphasizes state-of-the-art strategies for sustainable site development, water savings, energy efficiency, materials, and indoor environment quality. One of the major innovations was the use of Carlisle SynTec Inc.’s Sure-Weld® TPO Mechanically Fastened Roofing System. The white, 60-mil Sure-Weld membrane was installed over 8,555 square feet of the building’s roof offering Londonderry School a twofold benefit: exterior solar and heat reflection which helps reduce HVAC energy consumption, and water collection for sanitary facilities. Rainwater from the sloped roof is collected in a cistern and used to flush toilets in the school’s lavatories, and to provide water for the heating system. The roof was installed by Progressive Services Inc., of Dover, PA, a Carlisle authorized applicator.The first step of the roofing installation was to secure Carlisle’s Polyisocyanurate insulation to the deck using Carlisle fasteners and plates. Once in place, the Sure-Weld TPO reinforced membrane was attached to the insulation using Carlisle HP-X fasteners with piranha plates and then heat welded along the seams. TPO accessories and flashings were installed to complete the roofing portion of the project.Larry Toot, president of Progressive Services Inc., was pleased with the opportunity to work on the project. “The Londonderry School was the first LEED project we were involved in. Since the entire program was designed around the “green building” concept, we were able to take advantage of Carlisle’s total roof system package that meets ENERGY STAR® guidelines and includes membrane and insulation, as well as a total system warranty.” In addition to the white TPO membrane and its unique application for recycling run-off water, the building’s insulation values are very high, offering additional energy savings benefits to the school. Toot added, “We used two layers of 4-inch Polyiso throughout. And, since everything is manufactured by Carlisle, I am only dealing with one Carlisle-appointed representative. Also, the 15-year total system warranty gives everyone peace of mind.”Designed by the architectural firm of Murray Associates Inc. of Harrisburg and erected under the general supervision of the contracting firm of Harrisburg, PA-based A.P. Williams Inc., the Londonderry School was given a $500,000 loan by the Sustainable Energy Fund that led an area bank to finance the remainder of the $3-million project.The masonry exterior, accented by clerestory windows and large amounts of energy efficient glazing throughout, provides a splendid balance to the wooded pastoral setting just minutes from Pennsylvania’s state capital. With a “green” building, a Silver rating, and a white ENERGY STAR roof, Londonderry School and Carlisle set a good example of how environmentally friendly products can be integrated into design plans to reduce energy consumption and costs.Progressive Services Inc. was established in 1984 as a commercial roofing and sheet metal company. Located in Dover, PA, its founders brought together more than 65 years of combined experience in the roofing industry and continue to provide the company’s leadership today. For more information, please visit ( SynTec Inc., headquartered in Carlisle, PA, has been manufacturing single-ply membrane roofing systems for more than 40 years.  To date, Carlisle has produced over 10 billion square feet of roofing membrane. Carlisle is a business segment of Carlisle Cos. Inc. (NYSE: CSL) and has manufacturing facilities in Carlisle and Greenville, IL, and Senatobia, MS. For more information, write to Carlisle SynTec Inc., P.O. Box 7000, Carlisle, PA 17013; contact Melissa Mulligan, Advertising Department, at 1-800-4-SynTec; or visit our website at 

Voice your opinion!

To join the conversation, and become an exclusive member of Buildings, create an account today!

Sponsored Recommendations

Building Better Schools

Download this digital resource to better understand the challenges and opportunities in designing and operating educational facilities for safety, sustainability, and performance...

Tips to Keep Facility Management on Track

How do you plan to fill the knowledge gap as seasoned facility managers retire or leave for new opportunities? Learn about the latest strategies including FM tech innovations ...

The Beauty & Benefits of Biophilic Design in the Built Environment

Biophilic design is a hot trend in design, but what is it and how can building professionals incorporate these strategies for the benefits of occupants? This eHandbook offers ...

The Benefits of Migrating from Analog to DMR Two-Way Radios

Are you still using analog two-way radios? Download this white paper and discover the simple and cost-effective migration path to digital DMR radios that deliver improved audio...