What is the Shading Coefficient?
Shading Coefficient is the ratio of solar heat gain through a glass (or glass and shading combination) compared to the solar heat gain of unshaded 1/8″(3.0 mm) clear float glass at normal incidence. The shading coefficient of 1/8″ clear glass is 1.0. Glazing that blocks greater levels of solar energy have lower shading coefficients.