These frames were REALLY rotten. Managed to salvage the leadlight panel. Client to render the outside of the walls.

The original window- sorry i dont know why the picture image failed so badly. The Window was rotten and the top sash glass was ready to drop out the base of the sash.
Yesterday we installed 2 windows. 1 is a fixed frame where we reused the old leadlight. Pictures speak louder than words;-
New window in, but yet to cap/finish the surrounds
Yesterday we removed 4 sash window which had become very old and rotten and replaced with residential aluminium windows.
Here we replaced a rotten sill and transom in an atrium.
New glass in the bottom panels, siliconed joined together.
New glass beading around. ready for the painter to come in and finish off.