Flamed Granite Steps & Stair Treads: Finishes, Nosing and Sizes
Flamed granite steps are granite treads (and, where needed, risers) whose walking surface has been textured with a high-temperature flame, giving a rough, slip-resistant face that grips in rain and frost. For outdoor stairs, the key decisions are the finish on the tread and nosing, the nosing detail at the front edge, and sizes and thickness that suit your stair design. Ji Yuan Stone cuts flamed granite steps and treads from China-quarried granite, typically 2 cm and 3 cm thick (custom thickness on request), with flamed or natural-split tops and sawn sides, sized to your drawings.
This guide covers each decision in turn, with a checklist of what to send for a quotation.
Why Flamed Granite for Outdoor Steps
Steps are where people slip. A wet, smooth surface at a change of level is a real hazard, especially for entrances, terraces and public buildings. Flaming bursts the surface crystals of the granite and leaves a crisp, textured face with good grip, wet or dry. Granite's low water absorption also means it handles freeze–thaw cycles, de-icing salt and heavy foot traffic for decades without wearing smooth.
Flaming also lightens and evens out the colour slightly. A grey granite looks paler and more uniform when flamed than when polished, which is worth knowing if you want steps to match polished cladding or an interior floor.
Finishes for Treads, Nosings and Risers
A stair does not have to use one finish throughout. A common, practical combination is:
| Part | Recommended finish | Why |
|---|---|---|
| Tread (walking surface) | Flamed or bush-hammered | Grip in wet and icy conditions |
| Nosing (front edge) | Flamed, with optional anti-slip grooves | The part of the step the foot lands on first |
| Riser (vertical face) | Flamed, honed or sawn | Not walked on, so a smoother face is acceptable for contrast |
| Sides and back | Sawn | Hidden or bedded in mortar |
For covered entrances, some projects choose honed or brushed treads for a softer look. For any step exposed to rain, flamed or bush-hammered is the safer specification. Our guide on how to choose granite for outdoor projects compares finishes in more detail.
Nosing Options
The nosing is the front edge of the tread. It takes the most wear and the most knocks, and it is the detail that decides whether a stair looks finished.
Eased or Arrissed Edge
A small chamfer or radius on the top edge. It is the most common choice for outdoor steps because it stops the sharp corner from chipping while keeping a crisp, modern line.
Bullnose and Half-Bullnose
A fully or partly rounded front edge. It feels softer underfoot and suits traditional or residential designs. The rounded edge is usually finished smooth, so consider anti-slip grooves just behind it.
Anti-Slip Grooves
Two or three shallow grooves cut parallel to the nosing give extra grip on the edge and a clear visual line. They are popular on public stairs and steps in shaded or wet locations.
Contrast Nosing Strip
Many accessibility guidelines ask for a visually contrasting band at the nosing so people with low vision can see each step. With granite, this can be done by inlaying a darker or lighter granite strip, or by using a different finish along the front edge. Check the requirements of your local code.
Returned (Mitred) Nosing
Where the side of the stair is exposed, the nosing can be returned around the corner so the profile continues along the side. This needs to be shown on the drawing, because left- and right-hand pieces are cut differently.
Sizes and Thickness
Flamed granite steps are cut to your stair, not picked from a fixed list. Here is what to know:
- Thickness. Flamed granite steps and treads are typically 2 cm and 3 cm thick, with custom thickness on request. Thinner treads suit steps clad over a concrete stair; thicker pieces suit steps that span or overhang more, or that carry heavy public traffic. Your designer or installer should choose the thickness for the stair structure.
- Length and depth. Pieces are cut from slabs up to 2400×1200 mm, so long treads can often be made in a single piece, which avoids a joint in the middle of the step.
- Overhang. The nosing usually projects slightly beyond the riser. Agree the overhang with your designer and show it on the drawing.
- Rise and going. The height of each step and the depth of each tread are set by your local building code, so take them from your drawings rather than a generic table.
- Fall for drainage. Outdoor treads are normally laid with a slight fall towards the front so rain runs off instead of pooling.
The flamed granite steps and flamed granite stairs product pages show typical formats. Matching flamed granite paving in 2 cm or 3 cm can come from the same production run, so landings and surrounding paving match the treads.
Choosing a Colour
- Light grey (G603, G623). Neutral, hides dust and salt residue, and matches most paving. A safe choice for public buildings and long stair runs. See G603 and G623.
- Dark grey (G654). Strong contrast with light paving, and useful for contrast nosings. See G654.
- Yellow (G682). A warm tone that pairs with sandstone, brick and timber. See our G682 granite guide.
- Black. Dramatic, but it absorbs heat in strong sun and shows dust, so it is better for shaded or feature stairs.
Installation Notes
Granite steps last as long as the structure under them. Treads are bedded on a full mortar or adhesive bed over a concrete stair base, not on spot dabs, so there are no hollow areas that can crack under load. Use a flexible, stone-compatible adhesive outdoors, and leave movement joints where the stair meets the building or a long landing. Your installer should follow local practice for frost-exposed steps.
What to Send for a Quotation
- A stair drawing with the number of steps, tread length and depth, riser height and any landings
- The granite colour and finish for treads and risers
- The nosing detail: eased, bullnose, grooves, contrast strip or returned ends
- Any matching paving or coping for landings and side walls
- Your destination port or delivery city
Each tread can be numbered to the drawing before packing, so installers on site can set the pieces in order.
FAQ
Are flamed granite steps slippery when wet?
No. The flamed surface is rough and crystalline, which gives good grip in rain. For extra safety on the edge, add anti-slip grooves behind the nosing.
What thickness are flamed granite stair treads?
Flamed granite steps and treads are typically 2 cm and 3 cm thick (custom thickness on request), with flamed or natural-split tops and sawn sides. Matching flamed paving for landings is 2 cm or 3 cm thick.
Can you cut steps to my drawings?
Yes. Steps are cut to size from slabs up to 2400×1200 mm, with the nosing profile, grooves and returned ends shown on your drawing.
Can steps and paving come from the same stone?
Yes. Ordering treads, landings and paving together from one production run keeps the colour and texture consistent across the whole area.
Request Free Samples
The best way to choose a finish and nosing for your steps is to see and feel it. Send us your stair drawing, and we will reply with a quotation and free samples in the colours and finishes you are considering.
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