I inherited my dads house three years ago and ever since the damp (especially in my bedroom) has been getting worse and worse every year. I could not afford to have the heating on as much as he used to so the house is around 10-12 degrees all winter. His builder friends have said its condensation damp. How can i stop this it is so bad in the mornings there are circles of water (it comes in from where the blobs of glue-or whatever-on the plaster are). from the circles water is just running down the wall. I have used a dehumidifier which made no difference, we then painted the outside wall in thompsons silicon sealer which has made no difference, we have checked the newly fitted (three years ago) loft insulation isnt covering the vents in the roof. we painted the wall with damp paint, and a couple of months ago we put polystyrene wall paper up, but now the water and mould is just on the ceiling and on the carpet instead of the wall. On dry days i open the window in the hope this might work. If anyone has any ideas on how to stop this please could you let me know i will be very very grateful, thanks.