I have a 1935 bungalow with two bay windows, floating floor, double glazing, new damp proof course, rendering above damp proof course, new damp course, injected about 20 years ago. Floors have been partly covered by hardboard.
The bay windows have been replastered coated with water repellant, previously had insulation under wallpaper, plain wallpaper, emulsion including any damp emulsion but nothing seems to stop the damp. I have had a tube heater in the bay all winter but it still does not seam to work.
Please can you suggest anything I can do.