1.1 This test method covers a technique for determining the solar reflectance of a directionally reflective material using a commercial portable solar reflectometer including, but not limited to, roofing material surfaces with granules that have angularly dependent reflectance. The purpose of this test method is to evaluate the seasonal and annual solar reflectances of a directionally reflective roofing product. 1.2 This standard does not purport to address all of the safety concerns, if any, associated with its use. It is the responsibility of the user of this standard to consult and establish appropriate safety and health practices and determine the applicability of regulatory limitations prior to use.
This standard is needed to evaluate the solar reflectance of surfaces (materials) that have solar reflectances that depend on the angle of incidence of the incoming solar radiation. Solar reflectance is an important property for the energy related performance of a roof. Solar reflectance is a part of code requirements in some U.S. jurisdictions.
Keywordscool roof; angle-dependent reflectance
The title and scope are in draft form and are under development within this ASTM Committee.Back to Top
Ballot Item Approved as C1864-2017 and Pending Publication