Insulating glass is two or more plies of glass enclosing a hermetically sealed air space. Inherently, insulating glass increases a window’s thermal performance by reducing the heat gain or loss.
Insulating glass units are double sealed with a primary seal of polyisobutylene and a secondary seal of silicone. To provide a hermetically sealed and dehydrated space, the glass plies are separated by a desiccant-filled spacer with three bent corners and one keyed-soldered corner or four bent corners and one straight butyl injected zinc plated steel straight key joint. The desiccant absorbs the insulating glass unit’s internal moisture.
Typical configurations of insulating glass units.
When specifying insulating glass, it is important to select and clearly define the configuration as well as each individual components of the insulating glass unit.
