Yeh All Wife wants me to put together an 6ft x 6ft patio area in our garden, could someone just advise me how much sub base do I need as I think one of them bulk bags is gonna be way to much... I reckon third of a ton which is about 12 of them 25 kg bags @ wicks ???
At 75mm for 4 metres squares your looking at just over 1/2 ton of MOT 1. You can easily use a whole jumbo bag, by increasing the depth to 100mm (perfered depth), a deeper base give you a firmer area to lay your slabs on, less chance of movement/ settlement. Just make sure it's well compacted. EDIT: http://www.pavingexpert.com/calcall.htm#focus10