Hardcore/base for patio

Dan-Dan

Hi All

I have a sloping garden , half way down it , we want to build a wall , which would butt up to a rockery , the rockery slopes down from level ground , we want to turn the level ground and the rockery into a patio , which would go up to the wall we want built , I have a load of bricks etc , and will have earth from digging down 3 inches on the level ground , can I just use this , to fill in the `hole` created by the wall and the rockery ?

Is there a ratio of earth and hardcore required for these things? The wall would be approx 4 foot tall and 3 meters across, the rockery is the height of the proposed wall until about 2 yards away from where it will be, not sure how to express that in volume terms

Any advice useful because I have a skip half full of rubble which I will empty out if I know I can use it for hardcore….

Cheers

Dan-Dan

should point out that i am just doing the labour intensive work and letting an expert do the patio , i need to save costs....the wall will actually be about 3 foot , thinking on..