A compilation of home energy assessments for cool roofs, above-sheathing ventilation, radiant barriers, and other attic strategies

A combined experimental and analytical study documented the thermal performance of cool roofs in combination with other roof and attic strategies. Cool-colored roofs are a first line of defense against heat transfer penetrating the conditioned space. However, radiant barriers, above-sheathing ventilation, low-emittance (low-e) surfaces in an inclined air space above the roof deck, insulation, and conventional and advanced thermal masses (i.e., phase-change materials) are all possible candidates that can enhance cool roof and attic performance. Field data and benchmarked computer simulations are reviewed to better understand energy and economic trade-offs in a variety of climates.