Granite Steps & Stair Treads: Sizing, Finishes & Sourcing

Granite Steps Are a Repeat-Order Hardscape Staple

Granite steps and stair treads appear in every project type — entrance steps, garden terraces, pool decks, public plazas, office lobbies. Unlike decorative carvings they are specified by engineers and landscape contractors, which makes them a steady, repeat-order line: once a contractor finds a reliable supplier, the orders keep coming project after project.

Common Granite Grades for Steps

• G603 (Sesame White): light gray, the most used step granite for residential and garden stairs

• G654 (Sesame Gray): dark gray, dense grain, the standard for heavy-traffic public and commercial steps

• G623 / G682: warm gray and yellow-brown tones, popular for garden and Mediterranean-style entrances

• G684 / Black Granite: black or black-galaxy, used for premium lobbies and accent staircases

Granite beats marble for outdoor and public stairs because it resists wear, moisture and freeze-thaw cycles. Marble steps are reserved for indoor, sheltered or low-traffic settings.

Sizes: Treads, Risers & Block Steps

Steps are ordered as either cut treads and risers, or as solid block steps. Typical specifications:

• Treads: 120-150cm wide x 30-35cm depth x 3-5cm thick (cut to fit your stair plan)

• Risers: same width as treads, 12-18cm height, 2-3cm thick

• Block steps: full solid pieces 60-150cm long, 30-40cm deep, 12-20cm high — the classic garden entrance step

• Half-round steps: 120-180cm diameter, for curved entryways and pool corners

Send your stair plan (width, depth, rise, number of steps) and the supplier cuts to match. Most factories cut to drawing free of charge; mistakes are far cheaper to catch on paper than on stone.

Anti-Slip Finishes & Edge Profiles

Slip resistance is the first question for exterior stairs. Flamed or bush-hammered surfaces give the best wet traction; sandblasting is a middle ground; polished steps are for indoor or covered areas only. Edge profiles matter too: bullnose (rounded), chamfered, or square — bullnose is the most common for treads because it wears well and is comfortable underfoot. For extra safety ask for grooved or sandblasted anti-slip strips near the leading edge.

Block Steps vs Cut Treads: Which to Order

Block steps are single solid pieces — stronger, faster to install, and the preferred choice for garden and villa entrances. Cut treads and risers are thinner and lighter, ship more compactly, and suit larger stair runs and renovation projects where steps are fitted onto an existing concrete structure. If in doubt, order block steps for outdoors and cut pieces for interior or retrofit work.

Packing, Weight & Shipping

Granite weighs about 2.6-2.7 t/m³, so weight fills the container before volume. A 20ft container holds roughly 24-26 tonnes of steps; a 40ft container 26-28 tonnes. Cut treads pack flat in wooden crates with foam or straw separators between layers; block steps are banded individually and blocked in the container. Confirm net weight before booking — overweight containers trigger port surcharges.

QC Checklist

• Dimensions: verify every tread and riser against the drawing, +/-2mm on cut faces

• Color: one quarry batch per order, matched to the master sample

• Edges: bullnose radius consistent, no chips or flaking on the leading edge

• Surface: finish uniform, anti-slip treatment present on all walking surfaces

Ask for loading photos and a per-pallet tally sheet so counts and grades are verifiable at destination.

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