Is any relaxation available in the SHGC of skylights?


The prescribed SHGC for skylight as per ECBC is 0.25. A glass with SHGC as low as 0.25 will have a significantly low Visual Light Transmittance. Please clarify if any relaxation can be availed with the SHGC of skylight.


No relaxation is provided for meeting the SHGC of the skylight (horizontal glazing).

If the glazing is vertical, then it will be considered in vertical fenestration & WWR, hence, alternative compliance methods for facade will be applicable.


Have more questions? Submit a request