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You are edging public steps that get wet and have to pass an access check: a school, surgery or office entrance, or the first flight inside a busy door. This DDA stair nosing is built for that job. A 70mm tread plate carries a coarse gritted GRP insert, a deep 56mm leg caps the square front of the step, and the back edge ramps down onto the floor so vinyl, LVT, wood and other hard floors finish flush with no lip. Seven finishes, three insert colours, three stock lengths.
Approved Document K asks for a permanently contrasting band at least 55mm wide on both the tread and the riser of every step in buildings other than dwellings. This profile gives 70mm across the tread and 56mm down the riser. 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 insert is GRP with fused alumina or quartz grit set into the resin under a gel coat, so the grip runs through it. The manufacturer gives TRL pendulum values of above 95 dry and above 85 wet; anything over 36 is rated low slip potential.
Behind the insert, the aluminium tapers down to the floor covering, so there is no raised back edge to catch a heel or a cleaning machine, and the 3.5mm gauge keeps hard floors flush.
The straight leg, 56mm overall and 53mm inside, sits tight over a square nosing with no hollow underneath to flex. The GRP is General Purpose (GP) grade for fire and will not warp in heat or frost; the aluminium does not rust.
Entrance steps and covered approaches to offices, schools, health centres and shops; escape and service stairs; and internal flights where wet footfall comes in from outside, on square-edged concrete, stone or timber steps. For dry internal stairs the same 70 x 56mm profile comes with a textured High Grip insert or a PVC insert in a wide colour range.
| Profile material | Extruded aluminium alloy |
| Profile | Square edge with ramped back, single insert channel (DDA range) |
| Insert material | Gel-coated GRP with fused alumina or quartz grit (exterior grade) |
| Tread | 70mm |
| 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 (safety yellow), Coal (black), Everest (light grey) |
| Suitable floors | Vinyl, LVT, wood and other hard flooring |
| 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; 70mm tread and 56mm riser faces exceed the 55mm band of Approved Document K |
| 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 first. This profile suits square-edged steps deep enough for a 70mm plate. For a shallower riser band, the 70 x 32mm ramp back version is the same tread on a 32mm leg; for a narrower tread, the 56 x 56mm square DDA profile.
Insert colour is a safety decision. Pick the colour that contrasts with the tread: Coal on pale floors, Brimstone on dark and mid-tone steps, Everest where yellow is too loud.
Then the length. Take the next stock length up from your widest step; bars cut on site.
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. Lay the floor covering tight to the foot of the ramp. Sweep the grit regularly; mud and leaf litter clog it.
The profile is classed as Building Regulations compliant. Its 70mm tread and 56mm riser faces exceed the 55mm contrasting band Approved Document K asks for, and the published insert LRVs let you show contrast in an access statement.
Yes. The gritted GRP insert is the exterior grade and keeps a wet pendulum value above 85. On fully exposed flights, keep drainage clear and sweep the grit often.
The back of the tread plate tapers down to the floor instead of ending in a raised lip, so a hard floor covering finishes flush against it and nothing catches a heel or a wheel.
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 your step count 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 promptly and looked promising straight out of the box. Weve had it fitted along our mall entrance to manage the continuous foot traffic, especially during rainy spells. The gritted insert really holds up, providing superb traction without any noticeable wear even under constant use. Definitely enhances safety in wet conditions.
Ramp Back DDA Aluminium Stair Nosing 70 x 56mm, Exterior Grip Insert
Got this for the entrance steps of a historical building to boost safety while preserving their charm. It integrates beautifully with the old bricks, offering both modern functionality and a classic touch. The stair nosing doesnt just perform its function well; it adds a neat finish that stands out subtly in the warm evening light.
Ramp Back DDA Aluminium Stair Nosing 70 x 56mm, Exterior Grip Insert
Wasnt sure at first about this for our slippery staircase, given its appearance in the listing. Impressed with how sleek the finish of the stair nosing is up close, suits our modern office perfectly. Delivery was timely and everything well-packaged, even managed to fit it easily despite my lack of DIY skills!
Ramp Back DDA Aluminium Stair Nosing 70 x 56mm, Exterior Grip Insert
Put it in on the busy library steps months ago, and its holding up admirably. The sturdy nosing blends seamlessly into the architecture, keeping its gritted surface intact despite constant foot traffic and rough weather conditions. The finish still appears neat and professional up close, confirming its durability over time.
Ramp Back DDA Aluminium Stair Nosing 70 x 56mm, Exterior Grip Insert
Surprisingly straightforward to fit. I was a bit worried about trimming the length of this nosing, but it turned out to be much easier than anticipated with a hacksaw. It’s been securely in place on our campus stairs for weeks now, handling all sorts of weather and providing sturdy grip for everyone walking by.
Ramp Back DDA Aluminium Stair Nosing 70 x 56mm, Exterior Grip Insert
