A modern alternative to weights and lines is the spiral sash balance. It requires a smaller outer frame and can be easily incorporated between the outer skin of brickwork. This can offer some cost savings over the traditional window, but maintains many of the same attributes.

The spiral balance window is also fitted with slide pile to keep out draughts and to assist in the smooth operation of the sashes. The windows are delivered with all hardware fitted and include a timber parting bead to maintain that traditional look.