Need help choosing?
Talk to our team about sizes, finishes and fixing.
You are specifying step edges for a public building, and the steps get wet: an entrance flight, an external fire-escape stair, or the first few steps inside a door. This square DDA aluminium stair nosing is made for that job. Both legs are 56mm, so you get a contrasting band at least 55mm wide on the tread and on the riser, the width Approved Document K asks for in buildings other than dwellings. The tread carries a coarse gritted GRP insert, and the 3.5mm gauge sits on bare concrete or stone, or over vinyl, lino and lightweight carpet. Seven finishes, three insert colours and three stock lengths, every one priced individually.
Approved Document K, clause 1.7a, asks for step nosings in buildings other than dwellings to contrast a minimum of 55mm wide on both the tread and the riser. A typical 30 to 32mm riser leg only meets it on the tread; this profile is 56mm on both faces, made for offices, schools, health centres and shops.
The GRP insert has fused alumina or quartz grit sealed under a gel coat, so the grip runs right through it. The manufacturer gives TRL pendulum values above 95 dry and above 85 wet, where 36 already rates as low slip potential. Published LRVs (Coal 5.09, Brimstone 54.24, Everest 58.00) let you show the 30-point contrast Approved Document M asks for.
The deep leg, 53mm inside, caps the whole square arris so it cannot chip. The GRP is GP grade for fire and will not bow or warp in heat or frost, the aluminium does not rust, and the screws hide under insert plugs.
Entrance steps to offices, schools, colleges, health centres, libraries and shops; fire-escape and service stairs; steps to ramps and loading bays; communal entrances; internal flights just inside a door, where an access consultant or Building Control will check step-edge contrast. Concrete, stone or timber steps with a square front edge. For dry internal stairs the same 56 x 56mm profile comes with a textured High Grip insert or PVC inserts.
| 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 |
| Range | DDA range |
| Tread | 56mm |
| Riser | 56mm overall; 53mm 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; 56mm tread and riser faces meet the 55mm minimum of Approved Document K clause 1.7a |
| 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 and the building. This profile is for square-edged steps. In a dwelling or block of flats a 30mm riser band is enough, and the 56 x 32mm square profile takes the same inserts for less. For a wider tread band, see the 70 x 56mm ramp back.
Insert colour against the tread. Coal on pale concrete and stone, Brimstone on dark and mid-tone steps, Everest where yellow is too loud.
Finish against the riser. The metal is the riser band: Mill or Mirrorflect on dark stone, Satin Black or Dark Bronze on pale concrete.
Then the length. Take the next stock length up from your widest step; bars cut on site with a fine-tooth non-ferrous blade.
Make good damaged edges, then clean and dry the step. Push each nosing hard against the step so the deep leg sits flat on the riser, 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.
Its tread and riser faces are both 56mm, so it meets the 55mm minimum width of clause 1.7a on both faces, which most nosings with a 30mm riser cannot. Compliance also depends on contrast with your step, so choose the insert and finish against the tread and riser. Ask us if Building Control needs a copy of the certificate.
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 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.
Your payment information is processed securely. We do not store credit card details nor have access to your credit card information.
Overall rating: 5.0 / 5 from 7 reviews.
At this price, integrating it into existing flooring couldnt be simpler. This edging snugly matched with the concrete surface at our local library and has shown exceptional resilience to soggy conditions. The stair nosing gave us no fuss in installation and maintained an unobtrusive sleekness day in and day out.
Square DDA Aluminium Stair Nosing 56 x 56mm, Exterior Grip Insert
Works a treat once up, even if lugging it into position was a chore. The weight of this thing screams reliability as it sits firm and unmoved in awful British weather. Admittedly, the stairs at our industrial site feel drastically more secure now. Compared to less robust alternatives Ive had before, the stair nosing feels like money better spent on getting things right the first time.
Square DDA Aluminium Stair Nosing 56 x 56mm, Exterior Grip Insert
Needed a solid upgrade for the steps leading to our community hall. The aluminium profile with its gritted exterior did just the trick, especially for those wet winter days when safety is a priority. Easy instalment and it’s holding up nicely against all the foot traffic; seems like itll last ages!
Square DDA Aluminium Stair Nosing 56 x 56mm, Exterior Grip Insert
Wasnt sure at first if it would stand up to the pretty harsh conditions where we’ve put it in. The stair nosing turned out to be quite amazing, right from opening the parcel, I was impressed by how solid and well-packaged everything was. Weve slapped it onto a metal staircase in our parking garage where things often do get a bit grimy, and its managed really well so far. Up close, its finish actually adds a surprisingly clean line amid the usual chaos – huge thumbs up on that!
Square DDA Aluminium Stair Nosing 56 x 56mm, Exterior Grip Insert
Installed it months ago at our office entrance, and its holding up incredibly well. The grip is top-notch against constant foot traffic in all weather types, not to mention how nicely it bears the weight of loads weve carted upstairs. Just a rock-solid addition that has withstood plenty of wear and tear so far!
Square DDA Aluminium Stair Nosing 56 x 56mm, Exterior Grip Insert
Got this for our library entrance steps and it added a neat, polished edge to them straight out of the box. The stair nosing looks modern and grips well, handling soggy autumn leaves effortlessly. Perfect touch for safety in the wet weather were slogging through lately.
Square DDA Aluminium Stair Nosing 56 x 56mm, Exterior Grip Insert
Versatile product. It was a breeze to cut and had it fitted along the municipal buildings stairs in no time. Makes those tiled edges safe with that stair nosing, even when everythings damp or mucky.
Square DDA Aluminium Stair Nosing 56 x 56mm, Exterior Grip Insert
