The bedding layer is the thinnest layer in a paver patio and the easiest to underestimate, because a small depth over a large area still adds up to a real volume.
Bedding volume (cu ft) = area (sq ft) × layer depth (ft)
One inch = 1 ÷ 12 ft = 0.083 ft
Volume (cu yd) = cu ft ÷ 27
A one-inch layer under a 12 × 16 ft patio
ICPI’s inspection checklist and Belgard’s technical guide both describe a nominal one-inch layer of bedding sand over the compacted base. Over 192 sq ft that is 0.593 yd³ before allowance. The planner’s 10% allowance for base and bedding takes the order to 0.65 yd³.
Worked example 192 sq ft patio, 1 in bedding layer, 10% allowance
| Material | Calculated | Buy |
|---|---|---|
| Bedding material1 in layer, 10% allowance | 0.593 yd³ before allowance | 0.65 yd³ |
If you buy bagged sand, say 0.5 cu ft bags, the sand planner shows the same layer as 36 × 0.5 cu ft bags, which is 0.65 yd³ in bulk, including its own default 10% allowance.
Joint sand is a different line
The sand that sweeps into the gaps between pavers is separate from the bedding layer. How much a bag covers depends on the sand product, the paver and the joint width, so the planner only counts joint-sand bags when you enter the coverage from your product. For example, with a bag that covers 50 sq ft it lists 4 bags.
What changes the estimate?
- The bedding depth your paver manufacturer specifies
- The allowance for screeding and uneven base
- Whether the sand is ordered in bulk or in bags
- Joint sand, which comes from your product label and not from this volume
Use the type your manufacturer names
Sand type matters for pavers, and manufacturers specify it. This guide covers quantity only. Use the sand your paver manufacturer’s installation instructions call for.