Condensation damaging stained glass window frame

[Gabagool]

Hi all,

There is a small stained glass window in my kitchen, which gets a lot of condensation on it on cold days. The condensation runs down and can pool in the small gap between the window and the bottom of the frame.

This winter, it seems that the condensation has damaged the window frame, which is now cracked and peeling in the bottom corners (see pics attached). The bottom right corner is suffering particularly badly, with a crack and small dark patch emerging on the plaster underneath.

What can I do to prevent this from happening, and repair the damage that has taken place already? And what kind of tradesperson do I need to contact to come and do this for me?

The house is a middle flat in a Victorian mid-terrace (c.1875).

All advice greatly appreciated!

 

[crank39]

What can you do to stop it happening is stop creating moisture in the air or excessive moisture, the glass is a cold surface the the moist air is attracted to it, don't dry clothes on radiators or clothes horses, use extractors when cooking, open window when showering and above all ventilate by opening some windows

 

[JohnD]

You could also add secondary glazing, which will also cut heat loss. The cheapest method is a plastic film that is stuck to the frame leaving a sealed pcket of air against the glass. It will stick to clean, fresh paint but not to rough, dirty or scabby surfaces.

It is correct to have it sealed on the room side (where the water vapour is) and leave a crack or hole to ventilate the pocket to the external air. Old windows are usually draughty enough to do that.

This will prevent the warm, humid air from the room touching the glass.