Commercial Landscaping
Commercial landscaping is the volume end of the stone trade: office parks, public spaces, housing developments…
Published · By Gardenstone Editorial Team · Educational article from the SWME TRADE team
The best decorative gravel for commercial landscaping is washed, angular crushed stone: 14–20 mm for planted beds and borders, 20–40 mm for driveways and service routes, and 6–10 mm for resin-bound or pedestrian-only surfaces. Allow roughly 60–80 kg per square metre at 40 mm depth, and budget on one 20 ft container carrying about 24–27 tonnes.
Commercial work changes the selection logic. A residential garden is judged from a doorway; a commercial scheme is read from thirty metres away across a hotel forecourt, then walked on by staff for a decade. That means three things matter more than the colour swatch: whether the surface locks together underfoot or migrates into drains, whether the material can be reproduced lot after lot for phased handover and later top-ups, and whether the colour survives without becoming maintenance work. Decorative gravel that looked excellent in a 5 kg sample bag on a desk can still fail on a 3,000 m² business park if the grading is loose and the fines limit was never written down.
So the useful question is not which decorative gravel looks best, but which grade the specification can actually enforce. Answer those three questions — loading, area scale and repeatability — and the size band and shape choose themselves.
Match the band to the surface class rather than to taste. For resin-bound and pedestrian paving use 6–10 mm kiln-dried angular aggregate; for planted beds, tree pits and border topping use 14–20 mm angular stone laid 40–50 mm deep; for driveways, service roads, kerb margins and drainage strips use 20–40 mm angular crushed stone; and for large open planes, embankments and low-maintenance slopes use 40–70 mm, which resists being kicked or washed out of place.
Shape decides how the surface behaves, and it is the specification most often left vague. Crushed angular gravel has interlocking faces, so it compacts, holds on gradients and does not roll under a wheel or a boot. Rounded river gravel looks softer and is popular in residential schemes, but on paths and driveways it migrates, puddles underfoot and travels into gully gratings; sub-rounded stone sits between the two and works well over low-traffic beds. Write angular, sub-rounded or rounded into the purchase order, not just the millimetre band, and hold a sealed sample both sides have signed against.
Also decide between nominal single size and graded mixes. A single nominal size gives the cleanest, most uniform surface and is what design schemes usually specify; a graded mix with a spread of particle sizes compacts harder, moves less and is more forgiving on service areas and slopes, at the cost of a slightly less crisp finish. Where a project has both a showpiece entrance and working areas out of public view, it is normal to use two grades from the same source so the colour still reads as one material.
For a driveway, the best decorative gravel is washed 20–40 mm angular crushed stone laid to a compacted 50–75 mm depth over a compacted sub-base, with a geotextile membrane separating stone from soil and a rigid edge restraint holding the bed. That is a heavier specification than a planting bed for a reason: a driveway takes point loads, turning forces and water, and a rounded decorative pebble — however good it photographs — rolls out from under a tyre and leaves ruts within a season.
Depth is the number most often under-bought. At 50 mm the bed consolidates quickly and stone migrates into the sub-base; at 75 mm there is enough depth for the surface to stay loose and raked while the lower layer locks. On gradients above roughly 1 in 10, use the coarser end of the band, keep the fall running across the drive rather than down it where possible, and add a shallow drainage channel or French drain at the low point. Where the drive meets a road, a firm apron of bound paving for the first 1–2 m stops gravel tracking onto the highway and into the storm system.
Two choices depend on the site. A pale gravel on a driveway shows tyre marks, leaf tannin and iron-rich dust first, so light and mid-tones are usually safer than near-white unless the client accepts regular raking and washing. And if the drive is ploughed, blown or swept mechanically, a loose decorative bed will be progressively dragged to the edges and into piles; on those routes specify a resin-bound surface with 6–10 mm aggregate over a permeable base instead of loose stone, and keep the loose material for the margins.
Where a client wants the driveway and the borders to match, do not simply use one grade everywhere. The border material needs to look refined at close range, while the drive needs to carry load, so specify 20–40 mm for the drive and 14–20 mm for the beds from the same quarry and colour reference — the surface reads as one scheme and each area is built correctly.
Buy by depth, not by eye, and write the arithmetic into the enquiry so both sides can check it. Bulk gravel runs at roughly 1.5–1.7 tonnes per cubic metre, with denser basalt and granite at the top of that range and some lighter limestones below. On that basis, 20 mm of depth needs about 30–34 kg per m², so one tonne covers around 30 m²; 40 mm needs about 60–68 kg per m², or roughly 15 m² per tonne; 50 mm needs about 75–85 kg per m², or around 12–13 m² per tonne; and a driveway at 75 mm needs roughly 115–125 kg per m², or about 8 m² per tonne. Add 5–10% on top for settlement, edge build-up, spillage and later top-ups.
That arithmetic is also how you sanity-check two quotations with different bag weights. A supplier quoting a cheap rate per bag on a 20 kg bag and one quoting on a 25 kg bag are not offering the same product, and the gap disappears once both figures are converted to cost per tonne and then to cost per square metre at the specified depth.
Container capacity follows the same logic. A 20 ft container takes about 24–27 tonnes of gravel, or roughly 1,200–1,350 × 20 kg bags loose or about 1,000–1,150 bags if the load is palletised, since pallets consume volume that loose loading uses. At 40 mm depth that container dresses roughly 360–400 m² of bed; at driveway depth it covers far less, which is why driveway-heavy projects are almost always weight-limited rather than area-limited and should be quoted with the destination port in the enquiry.
Write the purchase order against figures that can be measured on a sample, not against adjectives. A workable commercial specification for decorative gravel is: nominal size band in millimetres with a within-band percentage and an oversize or undersize cap (90–95% within the nominal band, with the remainder in one adjacent band, is a common commercial position); particle shape stated as angular, sub-rounded or rounded; colour held as a sealed wet 1 kg reference, with a maximum share of off-reference stones counted in three random 1 kg scoops taken from different pallets; washed stone with fines and dust at or under 1–2%; broken and fractured particles at or under 5%; and unit mass tolerance of about ±1% on a 20–25 kg bag or ±1–2% on a one-tonne jumbo bag.
Two clauses matter more on commercial projects than on residential ones. The first is that approval samples must be drawn from production, not from the showroom or the sample room, because the sample room material is chosen and the production stream is what you will actually receive. The second is lot retention: keep a labelled reference sack from every production lot so that a colour or grading drift surfaces in container two rather than on site in container eight, when the first 400 m² are already laid and cannot be matched.
Then verify before the container ships: sieve each band on a sample drawn from production, run a wash test against the agreed fines limit, compare a wet 1 kg scoop from three different pallets against the sealed reference, spot-check bag mass on at least five bags per lot, and photograph the loaded container with date and lot reference. Wet comparison is not a detail — gravel reads darker and more saturated when wet, so a sample approved from a dry container photograph can arrive looking like a different material after a week of rain.
Wholesale decorative gravel normally starts at one 20 ft container, about 24–27 tonnes, or roughly 1,200–1,350 × 20 kg bags when loose-loaded. Ask for the MOQ per size band rather than per product line, because a supplier willing to mix two or three bands in one container is quoting a different minimum from one that will not, and the comparison is otherwise meaningless. For project supply it is common to combine decorative gravel, pebbles, sand and larger rock in a single shipment — useful when one contractor is delivering beds, paths and a water feature on the same programme.
Packing should follow where the stone is going. For retail and merchant resale, 20–25 kg PP bags on pallets with a printed grade label handle and stack better than jumbo bags. For direct project delivery, one-tonne FIBC bags keep handling simple and reduce bag count on site. For large open areas where the site can receive a tipping trailer, loose loading in a lined container is the most efficient way to buy tonnage, since every pallet and bag you remove is volume given back to stone. Confirm the pack split before quoting, because it changes both the per-tonne economics and the site labour requirement.
On landed cost, treat four factors as the real price drivers rather than the headline rate. Rock type sets density, and therefore how many square metres a tonne will actually dress — a dense basalt covers noticeably fewer square metres per tonne than a light limestone at the same depth, so the cheaper material per tonne is not automatically the cheaper material per square metre. Colour selection moves the price more than any other attribute, since a standard grey screened grade and a selected, washed, colour-sorted decorative grade are not the same product. Washing quality changes both appearance and how much dust you are paying freight on. And because gravel is heavy and low-value per tonne, ocean freight plus inland haulage is a large share of the delivered figure, so always ask for the quotation split between material, packing and freight to your port, and confirm whether the figure is per tonne, per bag or per square metre at your specified depth.
Use washed angular crushed stone in the band that matches the surface: 6–10 mm for resin-bound and pedestrian paving, 14–20 mm for beds and borders laid 40–50 mm deep, 20–40 mm for driveways and service routes, and 40–70 mm for large open planes and slopes. Angular stone interlocks and stays put; rounded gravel migrates on trafficked surfaces. Allow roughly 60–80 kg per square metre at 40 mm depth.
20–40 mm angular crushed stone is the standard driveway specification, laid to a compacted depth of 50–75 mm over a compacted sub-base with a geotextile membrane and a rigid edge restraint. Avoid rounded pebbles on driveways, because they roll out from under tyres and leave ruts. Where the drive is ploughed or swept mechanically, use resin-bound 6–10 mm aggregate instead and keep loose gravel for the margins.
At roughly 1.5–1.7 tonnes per cubic metre, 20 mm of depth needs about 30–34 kg per square metre, so one tonne covers around 30 m². At 40 mm it is about 60–68 kg per m², or roughly 15 m² per tonne; at 50 mm about 75–85 kg per m², or 12–13 m² per tonne; and at driveway depth of 75 mm about 115–125 kg per m², or around 8 m² per tonne. Add 5–10% for settlement, edge build-up and spillage.
A 20 ft container carries about 24–27 tonnes of decorative gravel, which is roughly 1,200–1,350 × 20 kg bags loose or about 1,000–1,150 bags if palletised, since pallets consume volume. Bulk wholesale orders normally start at one 20 ft container, with availability and minimum quantities stated per size band rather than per product line. At 40 mm depth one container dresses roughly 360–400 m² of bed, so driveway-heavy projects are weight-limited rather than area-limited.
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Everflorae — Artificial Plants & Trees
From the same supplier group, Everflorae supplies UV-stable artificial trees, palms and green walls that pair with stone — one source for hotels, resorts, malls and Japanese gardens.
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