A Study of the Energy-Saving Potential of Metal Roofs Incorporating Dynamic Insulation Systems
- ORNL
- Metal Construction Association, Glenview, IL
- Metanna, Monument, CO
This article presents various metal roof configurations that were tested at Oak Ridge National Laboratory in Tennessee, U.S. between 2009 and 2013, and describes their potential for reducing the attic-generated space-conditioning loads. These roofs contained different combinations of phase-change material, rigid insulation, low emittance surface, and above-sheathing ventilation with standing-seam metal panels on top. These roofs were designed to be installed on existing roofs decks, or on top of asphalt shingles for retrofit construction. All the tested roofs showed the potential for substantial energy savings compared to an asphalt shingle roof, which was used as a control for comparison. The roofs were constructed on a series of adjacent attics separated at the gables using thick foam insulation. The attics were built on top of a conditioned room. All attics were vented at the soffit and ridge. The test roofs and attics were instrumented with an array of thermocouples. Heat flux transducers were installed in the roof deck and attic floor (ceiling) to measure the heat flows through the roof and between the attic and conditioned space below. Temperature and heat flux data were collected during the heating, cooling and swing seasons over a three-year period. Data from previous years of testing have been published. Here, data from the latest roof configurations being tested in year three of the project are presented. All test roofs were highly effective in reducing the heat flows through the roof and ceiling, and in reducing the diurnal attic-temperature fluctuations.
- Research Organization:
- Oak Ridge National Lab. (ORNL), Oak Ridge, TN (United States). Building Technologies Research and Integration Center (BTRIC)
- Sponsoring Organization:
- Work for Others (WFO)
- DOE Contract Number:
- DE-AC05-00OR22725
- OSTI ID:
- 1150916
- Resource Relation:
- Conference: Thermal Performance of the Exterior Envelopes of Whole Buildings XII, Clearwater, FL, USA, 20131201, 20131201
- Country of Publication:
- United States
- Language:
- English
Similar Records
The Effects of Infrared-Blocking Pigments and Deck Venting on Stone-Coated Metal Residential Roofs
TASK 2.5.7 FIELD EXPERIMENTS TO EVALUATE COOL-COLORED ROOFING