Carcoon Or Similar

[dapleb]

I have water coming in still through the wall where it meets the floor. Have sunsuccessfully tried to seal it (from outside and in). The water pools and then meanders through the lockup and out of a drain at the far end. I am now trying to divert the flow of water so that it runs down the side and not through the middle.



Any ideas on how to divert water running over concrete? It needs to be practical over a considerable distance (20ish metres).



So far have thought of a trench though don't really want to cause damage. A concrete hump, would take a fair amount of cement and not sure how water tight it would be.



As a temporary measure I tried some plastic membrane with a plank on top but the floor isn't level enough for that to seal and is too dusty for sealant.



I guess a bucket of bitumen or three might work!