How to plan a garden path with wood-effect concrete stepping stones

A stepping stone path needs more than a length divided by a slab size. Decide whether the pieces will be spaced apart or form a continuous path, which way they will face and where the first and last pieces sit. Then test the layout before finalising the quantity.

Check the product before designing the path

The historical Ristone D70 sheet lists a wood-effect concrete slab measuring 720 × 225 × 35 mm, weighing 12.5 kg per piece, in Pine and Oak colours. It describes pedestrian use indoors and outdoors, with installation to Ristone’s instructions. Confirm current dimensions, weight, colours, availability and suitability with the quotation.

D70 is not specified here for vehicle traffic. Ask for explicit technical confirmation if the route must carry vehicles or other special loads.

G70 is a separate product. Its historical sheet describes a 720 × 225 × 10 mm decorative facing for terraces and walls. Similar appearance does not make it interchangeable with the 35 mm D70 slab; confirm its current use separately.

Spaced stones: test centres and orientation

For separate stepping stones, measure the distance between centres, as well as the open gap. A 2021 gait review reports a step-length range of 680–850 mm for healthy adults walking at a self-selected speed. The authors warn that the indicative values relate to the studied populations and may not apply generally (Mohan et al., 2021, Table 3). This is background about walking, not a recommended slab spacing or an accessibility standard.

Mark possible centres and slab outlines on the ground. Walk the route with the intended users and adjust the marks. Use markings or cardboard outlines for the trial, rather than stepping on unsecured slabs.

Orientation changes the layout. Across a straight path, D70 gives 720 mm across the route and 225 mm in the walking direction. At 700 mm between centres, the clear gap is 700 − 225 = 475 mm. Turn the slab lengthways and it occupies 720 mm in the walking direction, so 700 mm between centres would make adjacent slabs overlap. Recalculate and test the layout, including whether the available foothold suits the users.

Count intervals, then add one slab

First define the endpoints. In the examples below, the first and last slab centres lie exactly at the route endpoints. Equal spacing is adjusted after rounding:

intervals = route length ÷ target centre spacing, rounded to the nearest whole number

slabs = intervals + 1

Centre-to-centre route length	Target spacing	Rounded intervals	Slabs	Adjusted centre spacing
5,000 mm	700 mm	7	8	about 714 mm
10,000 mm	700 mm	14	15	about 714 mm
10,000 mm	650 mm	15	16	about 667 mm

These examples measure between centres, so the end slabs extend beyond the stated route endpoints. If the whole slab footprint must fit inside a fixed boundary, position the end centres accordingly and recalculate. If you retain an exact spacing found in the trial, the last centre may not coincide with the original endpoint. Show that choice on the sketch.

Measure a curved route along its course and draw the slab positions. The inner and outer gaps differ on bends, so the straight-path calculation alone is insufficient.

Continuous paths: include every joint

With D70 laid across the route, each slab contributes 225 mm to its length. For n slabs:

path length = n × 225 mm + (n − 1) × joint width + both end gaps

For a 10,000 mm path, suppose the joint is 20 mm and there are no end gaps. This joint is an arithmetic assumption, not an installation recommendation.

• 41 slabs occupy 41 × 225 + 40 × 20 = 10,025 mm, which is 25 mm too long.
• 40 slabs occupy 40 × 225 + 39 × 20 = 9,780 mm, leaving 220 mm.

The installer must resolve the difference using the model’s instructions, whether through the layout, joints or a suitable cut. Agree the actual joint width and filling before ordering.

Check weight, support and wet use

Using the historical weight, 15 D70 slabs weigh 187.5 kg, 16 weigh 200 kg and 41 weigh 512.5 kg, excluding pallet and packaging. Confirm transport and unloading arrangements for the actual order.

Before installation, ask Ristone and the installer to confirm the substrate preparation, fixing, joints, drainage, finished level beside the lawn and maintenance access. The published information used here does not include a slip-resistance classification; ask what information is available for the intended wet use.

Send a sketch with the quotation request

Include the route length and bends, endpoint convention, slab orientation, spaced or continuous layout, trial spacing if relevant, substrate and colour. Discuss any spare quantity separately from the geometric count. For one path, order the full quantity together where possible because small shade differences between production batches can occur.

Add the country, postcode, required date and unloading arrangements. Ristone supplies from Romania to the UK and the rest of Europe on a quotation basis, depending on product, quantity and destination. For the UK, transport, customs duties and import VAT are paid by the buyer.

See garden stepping stones or request a project quote. Final quantities and installation suitability are confirmed for the actual project.