Choosing your windows

Separating two glasses panes in a double glazing unit.

A spacer bar, sometimes known as a profile, is the continuous hollow frame which separates the two glass panes in a . double glazing window

The spacer bar is bonded to the glass panes via a primary and secondary seal, creating an airtight cavity which is filled with air or gas. The spacer bar itself is filled with a desiccant to absorb any residual moisture within the cavity and thus prevent condensation within the double glazing window. Spacer bars are an important contributor to a double glazing window’s energy ratings. They are typically made of aluminium, or a low heat-conductive material (known as a warm-edge spacer).

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