The Heat Island Group has collaborated with many industrial partners including:

Whiter Roofing Granules

During our collaboration with ISP Minerals, for example, ISP demonstrated how it can make an "advanced white" asphalt shingle with a solar reflectance of up to 0.6 in contrast to the industry-standard "white" with a reflectance in the range of 0.25 to 0.30. The advanced white shingle would lead to a cooler roof and, in turn, a cooler building. Link to: Roof Heat Transfer

Black Shingle	Conventional White Shingle	Advanced White Shingle
Reflectance = 5% Temperature = 180°F	Reflectance = 29% Temperature = 157°F	Reflectance = 60% Temperature = 128°F
ISP Minerals/LBNL shingles with whiter roofing granules reflect solar heat.

Reflectance of Cool Roofing Membranes

We tested a number of colored roofing membrane samples provided by Sarnafil. Two of the samples--a pale blue membrane and a green membrane--appear to the eye similar in color, but the blue membrane was much cooler.

Optically, these colors appeared very similar. The colors are quite different in this graph for clarity.

Coated Steel Roofing Materials

We tested several coated steel roofing materials samples provided by a manufacturer of coated steel roofing. A hunter green and a burgundy roofing materials had essentially the same thermal emittance as a birch white material. Also, a material called galvalume proved to be more reflective to sunlight than traditional galvanized steel. Our measurements are available. Link to: Cool Roofing Samples

To learn more about the instruments we use to characterize roofing samples, link to: Coof Roofing Instruments