How much topsoil do I need for grass?

I'm laying turf on a compacted area that had gravel on it previously. How deep should the topsoil layer be? How do I work out how many bags to order?

Asked by Michael on 16th Apr 2026
Expert Trade Answers
"If you work out the square metre to the depth youll get correct amount, 30sqm at 100mm deep you would need around 6 ton hope this helps"
Answered on 16th Apr 2026 - Member since Aug 2023 - report
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