Project 1 – Conversion of cellar to make use of unused space to provide an office and a utility room.We were lucky with this cellar’s headroom which was already 2 meters, this made easy work for us builders. We had to lower the floor by 300mm to insulate and make watertight. We then had to tank the walls, that is waterproof the walls with a sand and cement render with a sika waterproof additive. Fire proof the ceiling and board. Plaster complete.