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Insulated glazing (IG), more commonly known as double glazing (or double-pane, and increasingly triple glazing/pane) is double or triple glass window panes separated by a vacuum or gas filled space to reduce heat transfer across a part of the building envelope.

Insulated glass units (IGUs) are manufactured with glass in range of thickness from 4 to 10 mm or more in special applications.

Laminated or tempered glass may also be used as part of the construction.

The glass panes are separated by a "spacer" usually made of aluminium.

Spacers are filled with desiccant to remove moisture trapped in the gas space during manufacturing, thereby lowering the dew point of the gas in that space, and preventing condensation from forming on surface #2 when the outside glass pane temperature falls.

An adhesive sealant is applied to the face of the spacer on each side and the panes pressed against the spacer. Our company is certified to use hot melt, polysulfide and silicon sealants. 

Argon gas can be used to lower the U value and therefore the heat transfer of the insulated glass units.

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