The sashes are removed from the window frames and taken to the shop.

The old putty and glass is removed; old paint stripped to the bare wood.

Repairs are made to the sash using epoxy or replacement components if damage is severe. (see examples)

The sash are sanded smooth and primed for finish painting.

The original glass is bedded and reputtied. Any broken panes are replaced with period recovered glass.

Two finish coats of paint interior and exterior are applied and the sash are now ready to be reinstalled.

When the restored sash are installed and the mechanical restoration completed you have a window system that will last for many more decades with only minor maintenance.