Slabs for a 10 × 6 ft shed base, by slab size
A 10 × 6 ft shed is a long store that suits a narrow side return or the end of a garden. The base here is 3.0 × 1.8 m, converted at 0.3 m per foot, which leaves it marginally smaller than the shed floor as most shed makers ask (check your shed's instructions). The layout column shows where whole slabs fit with tight joints; the last column is the paving calculator's count with 10 mm joints and 10% for cuts and breakage.
| Slab size | Layout | Slabs by area | Slabs to buy |
|---|---|---|---|
| 600 × 600 mm | 5 × 3, no cuts | 15 | 16 |
| 450 × 450 mm | Needs cuts | 27 | 29 |
| 400 × 400 mm | Needs cuts | 34 | 36 |
| 300 × 300 mm | 10 × 6, no cuts | 60 | 62 |
| 600 × 300 mm | 5 × 6, no cuts | 30 | 32 |
| 900 × 600 mm | 5 × 2, no cuts | 10 | 11 |
Five by three: a long, narrow base
Fifteen slabs in three rows of five. On a base that is 3.0 m long and only 1.8 m wide, any dip in the sub-base shows as a rocking slab somewhere along the length, so compact the 1.25 tonnes of MOT Type 1 in one even layer and check it with a long straight edge.
For a firmer job, bed the slabs on a full mortar bed in place of sand: 0.40 tonnes of sharp sand and 3 bags of cement at 6:1, against 0.27 tonnes of sand alone for a 30 mm sand bed.
Sub-base and bed for 3.0 × 1.8 m
| Layer | Quantity |
|---|---|
| MOT Type 1 sub-base, 100 mm | 1.25 tonnes |
| MOT Type 1 sub-base, 150 mm (soft ground) | 1.87 tonnes |
| Sharp sand for a 30 mm sand bed | 0.27 tonnes |
| Or a 40 mm mortar bed at 6:1 | 0.40 tonnes of sharp sand and 3 bags of 25 kg cement |
Quantities include 5% extra. Check for buried services before you dig, using the free LSBUD service. Shed base options compared weighs slabs against concrete, a plastic grid and a timber frame, and the concrete version of this base is on how much concrete for a 10 × 6 ft shed base.
Want to change anything else? The calculator above is the full Paving Slab Calculator (UK): edit any number and the results update instantly.
Tools & materials for this project
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Frequently asked questions
How many slabs do I need for a 10x6 shed base?
15 slabs of 600 × 600 mm, laid 5 by 3, cover the 3.0 × 1.8 m base with tight joints and no cuts. Buy 16 to have 1 spare; that is the paving calculator's count with 10 mm joints and 10% extra.
What goes under the slabs for a 10x6 shed base?
About 100 mm of compacted MOT Type 1 (1.25 tonnes for this base) and a 30 mm bed of sharp sand (0.27 tonnes). On soft ground use 150 mm of sub-base, which is 1.87 tonnes.
How much sand and cement to lay slabs for a 10x6 shed base?
On a full 40 mm mortar bed at 6:1, about 0.40 tonnes of sharp sand and 3 bags of 25 kg cement. On a 30 mm sand bed it is 0.27 tonnes of sharp sand and no cement.
Related sizes and guides
Estimates only. Results assume standard materials and simple shapes. Supplier products vary, and the final call on quantity, structure and safety is yours. Check the Building Regulations and your supplier's guidance before ordering.