SRI Thermal Testing

Reduce heat islands by understanding your materials

CTLGroup performs solar reflectance index testing (SRI thermal testing) in general accordance with ASTM C 1549, “Solar Reflectance Near Ambient Temperature Using a Portable Solar Reflectometer,” and we calculate the solar reflectance index according to ASTM E 1980, “Standard Practice for Calculating Solar Reflectance Index of Horizontal and Low-Sloped Opaque Surfaces.” Note that solar reflectance is sometimes called “albedo”. SRI thermal testing is usually used to determine the solar reflectance index of materials for LEED-NC, Sustainable Sites Credit 7.1: Heat Island Effect: Non-Roof and Credit 7.2: Heat Island Effect: Roof. CTLGroup measures the SRI of:

  • Concrete and masonry pavers
  • Concrete and asphalt pavement and hardscape
  • Pervious concrete
  • Aggregate and stone
  • Wall and roof surfaces or coatings on surfaces
  • Most flat surfaces

We also measure thermal conductivity and R-value of a wide range of materials as well as thermal expansion, specific heat, and thermal diffusivity of concrete. Please contact Jon Feld at 847-972-3318 for additional information on our SRI testing capabilities.