I know we've got an old sceptic tank down at one end, I dunno how deep down it is tho'... I may just get a couple of bags of soil in and fill the big holes in... We're gonna put a shed up in one corner which is gonna be interesting cuz we're on a slope and that area will need proper levelling so we can get a slab of concrete down...
Like this one. Rules: posts should be 100mm square and no more than 2m apart, posts concreted in at least 60cm deep, supporting 100mm by 50mm joists should be 50cm apart. Sounds difficult but isn't and will be much cheaper than concrete if the slope is significant.
I know we've got an old sceptic tank down at one end, I dunno how deep down it is tho'... I may just get a couple of bags of soil in and fill the big holes in... We're gonna put a shed up in one corner which is gonna be interesting cuz we're on a slope and that area will need proper levelling so we can get a slab of concrete down...