We are getting ready to erect a shed at the back of the garden but we are on a slight slope. Unfortunately the ground is very clayey and jam packed with old bricks/stone/tiles etc. and it proving a right bugger to get level. I am not far out at the moment, about 1-1.5 inches height diff between front and back (8ft) - it is level across the 6ft width of the shed. I am intending on putting some 2'x2' paving flags down (3 down each side - thats right isnt it, so the shed overhangs the flags a bit?) - can I make up that much height difference with a mortar bed when I set the flags in their final positions? (any mortar mix recommendations welcome for this too :o)
Also, is a polythene sheet recommended under the shed to help keep the damp away - and if so, would that be underneath or on top of the paving flags?
cheers
Dave.