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Sash weights are heavy counterbalances-traditionally made of lead or cast iron-hidden inside the box frame of a sash window. Connected to each sash by cords or chains running over pulleys, they offset the weight of the glass and timber, allowing the sashes to open and close smoothly and stay securely in position.
In heritage restorations, original weights are often retained or replaced with accurately matched replicas to preserve authentic operation and balance, especially when upgrading to heavier double-glazed units.
Victorian Sash Windows
Victorian sash windows are characterised by their taller proportions, often featuring a two-over-two or six-over-six glazing bar pattern, ornate sash […]
Gas filled unit
A gas-filled unit is a type of double or triple glazing where the space between panes is filled with an […]
Lead
Lead has been used for centuries in traditional windows-primarily as counterweights in sash window box frames and occasionally in leaded […]
