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. Can anyone please advise on the best way of solving this problem at relatively low cost. A neighbour had a waterseal pebbledash style coating applied at a cost of £4000 and it hasn't worked for her. I don't want to make a similiar mistake!