Garden-path gravel and paver bases: obtain the layer specification before ordering.
Why can a material quantity guide not choose one universal gravel depth or particle size?
The intended application comes first
A loose garden-path surface, a paver bedding layer and an aggregate base are different parts of a plan. Record the selected system and the named layer. A product sold as pea gravel, crushed stone or paver sand does not automatically satisfy all three roles.
Source guidance distinguishes applications
Belgard’s installation resources state that base depth depends on soil and application and provide different details for selected systems. That supports asking for the actual specification. It does not justify copying a depth or particle-size rule from one system into every garden path or patio.
Obtain the established depth and grading
Ask the responsible designer, installer or matching product documentation to supply the selected layer depth, grading, placed-versus-loose basis and any separate delivery conversion. This article does not design drainage, excavation, ground support, compaction or a stable walking surface.
Show what a supplied depth changes
For an illustrative measured 10 m² layer, a supplied 0.03 m depth represents 0.3 m³ and a supplied 0.05 m depth represents 0.5 m³. These scenarios explain the quantity effect only. Neither depth is recommended here, and the geometric volume does not establish the loose delivery quantity if the specification uses a placed volume.
Round on the supplier’s order basis
A confirmed 0.3 m³ loose-volume order sold in 0.2 m³ increments needs two increments, supplying 0.4 m³. A 0.5 m³ order needs three increments, supplying 0.6 m³. At hypothetical 25 per increment, the material subtotals are 50 and 75 before delivery. Use a supplied density separately if the actual quotation is by mass.
Use the matching calculator
Use this decision sequence
- Record the exact selected products and the intended comparison.
- Separate source-supported properties from missing suitability data.
- Measure the confirmed quantity and request complete matching quotations.
- Compare the supplied scenarios without inferring safety or performance from price.
Keep the quantities distinct
| Quantity or assumption | How to use it |
|---|---|
| Surface, bedding and base | Separate layer roles and product records. |
| Depth and grading | Inputs from an established matching specification. |
| Order volume | Check loose versus placed basis and delivery increments. |
Worked comparison
A measured 10 m² layer at supplied 0.03 m and 0.05 m depths represents 0.3 m³ and 0.5 m³. If those are confirmed loose-order volumes sold in 0.2 m³ increments, the orders supply 0.4 m³ and 0.6 m³ respectively.
Check before using the estimate
Keep dated quotes, product codes and assumptions with the comparison. A general material name does not establish the selected product’s performance.
All dimensions, product properties, prices and specifications in this example are illustrative arithmetic inputs. Use the values from your measured plan, selected product data sheet and supplier quote. This guide does not choose construction specifications or certify safety.
Sources and product references
References support the factual distinctions and scope described above. Growing guidance is regional and care instructions are product-specific. Worked numerical examples are independent illustrative arithmetic.
Calculation and scope checked 2026-10-13. Methods and scope.