I understand that for the garage and doors with level threshold, you install some sort of ACO, but what about the areas of the house which are not entrances, but you want at the same level? Could you for instance run some sort of ACO drainage around the whole house so that you have the exact same level? I am trying to avoid having a 150mm step down from level threshold areas.
For example, I have a path that runs down the back of the house. It has steps one end, but at the other end is our patio. If I keep this section 150mm below dpc, I will then have a 150mm step up to the patio and will create a potential pond.