Do I need a membrane under block paving?
Similarly, you may ask, should I put membrane under slabs?
I would advise taking at least another 2” of soil out, a minimum of 4-5” of MOT is standard for a patio, you don't need weed membrane as weeds won't grow under the patio only in the joints if they are not grouted properly.
Beside above, how do I block a sloping drive? Always begin laying block paving from the bottom of a slope, preferably starting from a right angle or a straight edge. Place the blocks on top of the laying course ensuring blocks are around 45mm above the desired finished level. Continue up the slope, checking your pattern with the design as you go.
Similarly one may ask, do you need landscape fabric under pavers?
Some patio builders favor deterring weeds with a layer of landscape fabric, positioned at the bottom of the bed, under the gravel or between the gravel and sand layers. Further, nonporous and even porous plastic fabric can interfere severely with water drainage, making pavers slippery and washing away supporting sand.
How deep should sub base be for block paving?