Flush Glazing (Pocket Glazing)
From Roofing, Solar Power, and Spray Foam Insulation Wiki
Flush Glazing (Pocket Glazing)
The setting of a lite of glass or panel into a four-sided sash or frame opening containing a recessed "U" shaped channel without removable stops on three sides of the sash or frame and one channel with a removable stop along the fourth side.