Posted on Apr 3, 2015 in
SG stands for single-glazed, or more commonly known as single-paned glass. SG glass is frequently used on interior doors that require less sound dampening and insulation.
IG stands for insulated glazing, or double-paned glass. This type of window is constructed of two panes of glass with a central airspace. Exterior doors should usually use IG windows because they provide superior insulation from both warm and cool weather.
