I've got a cellar, probably 12 x 10 and not quite 6 ft high. At the moment its damp down there, anything down there for a period of time either rusts or grows a lovely mold. I want to make this space usable. I had a builder come round to have a look and he thinks he can coat the walls with a product, level the floor off, put up a vapour barrier and then brick around the room. Leaving me with a less damp middle area. He says it will not be 100% damp proof buut it will be better and will not cause damp problems to the room above. The cellar has a number of airbricks to outside that he said would need to be improved to increase airflow in the cavity (between old wall and new wall). He's not given me a price but I'm dubious. Won't putting a barrier up cause the damp to travel upwards?