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You are edging square steps that get wet: entrance steps, external stairs to a fire exit, or an internal flight that takes rain in off the street. This square aluminium stair nosing is made for that job. A 56mm tread plate carries a coarse gritted GRP insert, and a straight 32mm leg drops down the riser to cap the square edge of the step. The 3.5mm gauge sits on a bare concrete or stone step, or over vinyl, lino and lightweight carpet. Seven finishes, three insert colours and three stock lengths, every one priced individually.
The insert is GRP with fused alumina or quartz grit set into the resin and sealed under a gel coat, so the grip runs through it rather than sitting on top. The manufacturer gives TRL pendulum values of above 95 dry and above 85 wet; anything over 36 is rated low slip potential. That wet margin is why you choose it over PVC on any step that sees rain.
The straight leg, 32mm overall and 29mm inside, meets the tread at a right angle, so the profile sits tight over a square nosing with no hollow underneath to flex and loosen the fixings. It protects the arris from chipping and stops floor coverings fraying at the nose.
Insert LRVs are published: Coal 5.09, Brimstone 54.24, Everest 58.00. Approved Document M treats a difference of more than 30 points as adequate visual contrast, so one of the three will clear it on almost any tread. The profile is classed as Building Regulations compliant.
The GRP is General Purpose (GP) grade for fire, 193 MPa in flexure and 123 MPa in tension, and will not bow or warp in heat or frost. The aluminium does not rust, and the countersunk screws hide under insert plugs.
External entrance steps to offices, schools, health centres and shops; fire-escape and service stairs; steps to ramps and loading bays; communal entrances; internal flights just inside a door. Concrete, stone or timber steps with a square front edge. For dry internal stairs the same 56 x 32mm profile comes with a textured High Grip insert or PVC inserts in 15 colours.
| Profile material | Extruded aluminium alloy |
| Insert material | Gel-coated GRP with fused alumina or quartz grit (exterior grade) |
| Insert channels | Single |
| Stair profile requirement | Square edge |
| Tread | 56mm |
| Riser | 32mm overall; 29mm inside leg |
| Gauge | 3.5mm |
| Stock lengths | 2.44m (2440mm), 2.75m (2750mm), 3.22m (3220mm) |
| Finishes | Mill Finish, Satin Gold, Satin Bronze, Dark Bronze, Satin Black, Mirrorflect Silver, Mirrorflect Gold |
| Insert colours | Brimstone (yellow), Coal (black), Everest (light grey) |
| Suitable floors | Bare concrete and stone, vinyl, lino and lightweight carpets |
| Use | Internal and external |
| Slip resistance (TRL pendulum) | Above 95 dry, above 85 wet - manufacturer stated (36+ = low slip potential) |
| Insert LRV | Coal 5.09, Brimstone 54.24, Everest 58.00 - manufacturer stated |
| Fire resistance | General Purpose (GP) grade - manufacturer stated |
| Flexural / tensile strength | 193 MPa / 123 MPa - manufacturer stated |
| Building Regulations | Building Regs compliant profile |
| Fixing | Pre-drilled and countersunk; screw and adhesive fix, screws concealed by insert plugs (fixings not included) |
Product data sheet (PDF)
Dimensions, slip, LRV and fire data, installation steps and care.
Check the step edge first. This profile is for square-edged steps. Rounded noses need a bullnose profile; for a deeper leg that covers more of the riser, the 56 x 56mm square profile takes the same inserts.
Insert colour is a safety decision. Pick the colour that contrasts with the tread: Coal on pale concrete and stone, Brimstone for high visibility on dark and mid-tone steps, Everest where yellow is too loud on a dark floor.
Then the length. Measure the widest step and take the next stock length up; bars cut on site with a fine-tooth non-ferrous blade.
Finish last. Mill Finish is the usual choice outside. Satin Black and the bronzes recede into dark schemes; Satin Gold and the Mirrorflect finishes are for entrances where the metal is meant to be seen.
Make good damaged edges, then clean and dry the step. Push each nosing hard against the step and mark through the drill holes; on concrete or stone, drill and plug, using corrosion-resistant fixings outside. Apply cartridge adhesive to the underside, screw down firmly and press the insert plugs over the screw heads. Sweep leaf litter and moss out of the grit regularly and wash with water and a neutral detergent; avoid solvents on coloured finishes.
Yes. The grit insert is the exterior grade and the aluminium does not rust. The manufacturer gives TRL pendulum values above 95 dry and above 85 wet, where 36 or more already counts as low slip potential.
The profile is classed as Building Regulations compliant, and the published insert LRVs let you show step-edge contrast in an access statement. Ask us if Building Control needs a copy of the certificate.
The 3.5mm gauge suits vinyl, lino and lightweight carpet, or a bare concrete or stone step. Thick or heavy-pile carpet would stand proud of the plate; ask us for a heavier-gauge profile.
Allow a few millimetres per saw cut. A 2.44m bar gives two 1.2m steps, a 2.75m bar two 1.35m steps, and a 3.22m bar three 1.05m steps or two 1.6m steps.
All 63 combinations of finish, insert colour and length are priced individually above. Nosings ship as full stock-length bars for cutting on site, with flat-rate UK delivery at £9.99; order by 2pm on a working day for same-day dispatch. For project quantities, send us the step count and widths for a quote.
View our complete range of stair nosing profiles - aluminium, rubber and PVC options for every application.
| Service | Timeframe | Cost |
|---|---|---|
| Standard UK Delivery | 2 working days from dispatch | £9.99 |
Orders placed by 2pm (UK time) on a working day are dispatched the same day. Orders placed after 2pm or on non-working days are dispatched the next working day. Delivery takes 2 working days from dispatch. Working days are Monday to Friday, excluding bank holidays. UK delivery costs £9.99. Contact us for international enquiries.
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Overall rating: 5.0 / 5 from 5 reviews.
Came within days and securely boxed. I used it for my outside steps in the garden, and the aluminium with grip inserts provides solid footing even when its wet or theres a lot of foot traffic. The stair nosing was straightforward to fit and has performed wonderfully under regular use.
Square Aluminium Stair Nosing 56 x 32mm, Exterior Grip Insert
Put it in about half a year ago at the local library, and I’m happy to say its held up brilliantly. The grip is just as strong as day one, even with plenty of people tramping over it daily, and autumn leaves do nothing to diminish its effectiveness. Im genuinely surprised by how well its resisted the elements and kept everyone on sure footing!
Square Aluminium Stair Nosing 56 x 32mm, Exterior Grip Insert
Wasnt sure at first if it would arrive on time for the office renovations, but delivery was remarkably prompt and nicely packaged. The stair trim glided perfectly into place and has held up well to the constant foot traffic under pouring rain or dry conditions. Given its sleek design and reliable grip, Im glad we went with this choice for our busy office space.
Square Aluminium Stair Nosing 56 x 32mm, Exterior Grip Insert
Picked these to enhance the entrance steps at our shopping centre, and theyve truly upped the game. The stair nosing blends seamlessly with the concrete, giving a neat finish that feels secure underfoot. Considering theyre exposed to all weather types, the sturdy grip is still holding its own magnificently; glad I chose this for such a high-traffic area.
Square Aluminium Stair Nosing 56 x 32mm, Exterior Grip Insert
Sturdily built, the stair nosing felt reliable as soon as I saw it. Managed to cut it neatly and fit it onto my wooden staircase without much trouble, despite feeling a bit fiddly at first.
Square Aluminium Stair Nosing 56 x 32mm, Exterior Grip Insert
