I have a split level property showing internal damp due to negative hydrostatic pressure on the lower level where the earth retaining back wall meets the outside wall.
I need some advice on the height of tanking I will need to sort the problem.
With all the rain we've had, I don't expect what damp is showing to get any worse, so if I hack off the plaster 6inches above the highest point and tank it, will the water be able to redirect itself over the top of the repair?
I plan to tie the wall tanking in to the floor by chasing out an inch square gully and filling it with hydraulic cement on top of the bitumen latex emulsion/slurry which will go on the wall before replastering.
Any advice gratefully received.