Windows and Envelope Materials

Windows and Envelope Materials

Windows and Envelope Materials researchers develop energy-efficient window systems, and studies advanced daylighting designs, which allow the use of natural light in place of electric lighting. Its research areas include:

  • advanced materials and coatings for windows
  • energy performance of window systems (such as windows, glazings, frames, and blinds)
  • computer tools to improve energy performance and aid product rating and labeling
  • daylighting strategies, including sensors that detect light levels and occupancy, and adjust electric lighting appropriately in response
  • cool-colored roofing materials to reduce urban heat islands and air conditioning energy use

Publications by Organization


Hart, R., H. Goudey, and D. C. Curcija, Experimental validation for thermal transmittances of window shading systems with perimeter gaps, Journal of Building Performance Simulation, pp. 1 - 13, 2018.
Hart, R., Numerical and experimental validation for the thermal transmittance of windows with cellular shades, Energy and Buildings, vol. 166, pp. 358 - 371, 2018.


Kohler, C., Y. Shukla, and R. Rawal, Calculating the Effect of External Shading on the Solar Heat Gain Coefficient of Windows, in Building Simulation 2017, San Francisco, CA, 2017.
McNeil, A., E. S. Lee, and J. C. Jonsson, Daylight performance of a microstructured prismatic window film in deep open plan offices, Building and Environment, vol. 113, pp. 280–297, 2017.
Hart, R., H. Goudey, and D. C. Curcija, Experimental validation and model development for thermal transmittances of porous window screens and horizontal louvred blind systems, Journal of Building Performance Simulation, vol. 11, no. 2, pp. 190 - 204, 2017.
Geisler-Moroder, D., E. S. Lee, and G. J. Ward, Validation of the Five-Phase Method for Simulating Complex Fenestration Systems with Radiance against Field Measurements, 15th International Conference of the International Building Performance Simulation Association. 2017.


Lee, E. S. et al., Technology Assessments of High Performance Envelope with Optimized Lighting, Solar Control, and Daylighting, Lawrence Berkeley National Laboratory, Berkeley, CA, 2016.


Hoffmann, S., A. McNeil, E. S. Lee, and R. Kalyanam, Discomfort glare with complex fenestration systems and the impact on energy use when using daylighting control, 10th International Conference on Advanced Building Skins. Bern, Switzerland, 2015.