Is the wall north facing , what is the construction , solid or cavity
If the damp is not penetrating it will be condensation and you will need to find a ventilation or dehumidification solution
Regards
Paul
as the damp is evidenced up to 1m it sounds like rising damp . check for a bridged/ failed damp course , is it still wet, painting over the problem will not solve it
Paul
ventilation and air moisture are the issues here, as the windows are single glazed they will always be the coldest part of the room , assuming this temperature is below the dew point of the room you will have condensation
if you have buildings insurance it may be worth making a claim for the damage The masonary / floor will be soaked and will require proper dring out (this could take 3-4 weeks using blowers and dehumidification The top surface 2mm or so will appear dry quiete quickly but the moisture is still there b...
[quote="Jesse"]We live in a 30s terraced house. The second floor outer wall is covered in pebbledash. Water has seeped through the wall at around 1m high, spoiling the wall paper and the plaster is crumbly. The guttering is fine. The pebbledash has not been painted for at least 4 years. Ca...
