i live is a semi detached house which has a shared driveway with my neighbours. i intend submitting drawings for planning permission for a garage which will sit on my half of the driveway. (about 2.4m wide). and a small reception room behind.
my issue is the fact that the ground slopes down slightly from back to front, and also from left to right. So if i build out to the side the ground level will be above the DPC slightly at the front, but about 18 inches at the rear.. since this is going to be a two storey extension i was going to keep the build simple by using double skin wall construction all the wayround.
The trouble is, the neighbours drive will be left as 2.5m wide, so it will have to continue right up to the side of the garage wall in order for them to use it. this does not allow me room to drop the ground below the current normal DPC level.
I could raise the DPC 150mm above the ground level, or even stagger it higher as it goes back, but how do i deal with the difference in DPC level from the inside ground level to the DPC on the outside wall. Is there a way of creating a small 'tanking', effect inside the casvity on the bottom, to prevent the damp coming accross.
my issue is the fact that the ground slopes down slightly from back to front, and also from left to right. So if i build out to the side the ground level will be above the DPC slightly at the front, but about 18 inches at the rear.. since this is going to be a two storey extension i was going to keep the build simple by using double skin wall construction all the wayround.
The trouble is, the neighbours drive will be left as 2.5m wide, so it will have to continue right up to the side of the garage wall in order for them to use it. this does not allow me room to drop the ground below the current normal DPC level.
I could raise the DPC 150mm above the ground level, or even stagger it higher as it goes back, but how do i deal with the difference in DPC level from the inside ground level to the DPC on the outside wall. Is there a way of creating a small 'tanking', effect inside the casvity on the bottom, to prevent the damp coming accross.
