I have just completed a renovation of my house. Where possible, I am putting decking around it to keep the brickwork dry and ventilated. One wall, however, will have sand and dirt added to build up the land by 30 odd centimetres. Before I so this, should I paint the lower part of the wall in bitumen paint to waterproof it or is that just overkill?
BTW: I am adding sand to protect a number of PVC pipes that run next to the wall.