Hi
Our extension back wall sits 500mm below DPC level owing to patios on ours and neighbours side.
I know convention says fill 225mm below DPC to prevent the ground crushing the cavity in. What should I do in my case though, where there is no ground on one side, and a good rigid bed of MOT/sand/concrete (making up the floor) on the other?
Our extension back wall sits 500mm below DPC level owing to patios on ours and neighbours side.
I know convention says fill 225mm below DPC to prevent the ground crushing the cavity in. What should I do in my case though, where there is no ground on one side, and a good rigid bed of MOT/sand/concrete (making up the floor) on the other?
