I'm extending my garage to give more non-car user space. Because of the land slope the current garage sits on a concrete and brick plinth - to avoid a large infill, the extension is going to have a suspended wooden floor which will supply some storage for pipes and the likes under it.
The question is this - I've cut away part of a 600mm high bank for the extension; I've laid a found and built a 3 dense concrete block high retaining wall with a couple of buttresses. Currently there's about
300mm between the bank and this wall. I would like to prevent moisture getting into this wall - I know it will come up from the bottom but with ventilation that won't be serious. But if I just in fill the soil back against it the moisture penetration will be significant.What does the collective recommend ?
Thanks
Rob