Damp Proof Membrane between Flowerbed and Garage Wall
We are landscaping the garden with artifical grass after leveling it quite a lot. The area next the the neighbours walls is a bit of concer as with the level we are coming quite high up the damp proof course. I am concerned that the flower bed will cause the damp to go into the neighbours. Our landscaper insists that he will put the damp proof membrane next to the wall which will go below the DPC and will be higher than the flowering bed.
Do you think this will be enough to prevent damp to penetrate the wall or do we need to do something else to for it. I have asked them about the sleeper (4 walls) but they insist that the damp proof membrane would be enough.
Can anyone please suggest?