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Steel window

A window built from slender solid steel sections.

Steel is the strongest window material, so its members can be the thinnest. A steel window has narrow lines and many small panes, the look of factories, warehouses and houses of the early twentieth century.

The sections are solid, welded at the corners, and traditionally glazed with putty. Steel rusts unless it is galvanized and kept painted, and like aluminum it conducts heat, so an old steel window is cold and prone to condensation. Modern ones can be made with a thermal break.

Bottom rail of a steel sash in section, outside at left

Hover or tap a part to see what it is called.

Steel sash, bottom rail in section

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