Oct 08, 2022 · 17th October 2022 at 9:20 am. A slab that size would need around 40m3 of ncrete, assuming a depth of 300mm. A m3 of ncrete sts between £65 and £85 depending on the specification, so budget between £2,600 and £3,500 for your slab, plus labour. Mike Hardwick, Build It expert. Log in to Reply. David Brookes says: 6th December 2022 at 2
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