Internal wall condensation

[coxo]

Hi,

I have a Victorian property with a bay window (facing north-east). Under the bay window suffers terribly from condensation - it can't have cavity wall insulation as a) is single skin and b) has rendering on the outside. Open fires help the situation (and clears condensation off the window) but doesn't solve it.
Any suggestions?
Thank you!

 

[oilman]

When was the rendering put on? What sort of windows do you have? Are they draught sealed?

 

[coxo]

Not sure when the rendering was done - I'd have thought many years ago. Windows are wooden framed, single paned. No draught exclusion. When it's windy you can feel it!

 

[Frederick]

This Safeguard website has useful information about dealing with condensation http://www.safeguardeurope.com/applications/condensation.php