It may be possible to carry out repairs to a window on site, but extensive repairs or rebuilding is best carried out in the workshop.

 

Repairs are time consuming and it may not always be possible to match the type and shade of glass. Some of the lead types are now similarly unavailable.

 
A picture of a restored pub window is shown below . Both the background clear glass and the lead surrounding the vine motif were unavailable so the clear background was taken from other unrestored windows  from the same source, i.e. a public house which has since been demolished. As the window was not going to be reinserted as an external window, the central motif was copper foiled and then inserted into leads. One window down and thirty nine others still to go.

 
          pubwind.jpg (5075 bytes)  Size 22.0 cm x 43.0 c

 

Where the leads and cement making the window watertight have deteriorated over time and a few of the glass pieces have cracked, it is best to rebuild the window reusing the uncracked cleaned glass and substituting new pieces for those that are cracked. New leads and cement make the window as good as new

 
I do not undertake large scale restoration work. I leave that to those who don't mind ladders and scaffolding. Similarly extensive repainting is best left to specialist glass painters.