Ramp Back DDA Aluminium Stair Nosing 70 x 56mm

A 70 x 56mm DDA range aluminium stair nosing with a square front, a ramped back and a textured High Grip insert. It brings the deep 56mm riser face of an accessible-stair nosing to stairs finished in LVT, wood and other hard floors, where the ramp gives a lip-free finish at the back of the profile.

Choose Obsidian or Solar insert in any of nine aluminium finishes, in 2.44m, 2.75m or 3.22m stock lengths for cutting on site.

Why this nosing works

Deep riser, flush finish

Approved Document K, clause 1.7a, asks for step nosings in buildings other than dwellings to contrast visually over a minimum of 55mm on both the tread and the riser. Approved Document M sets adequate visual contrast as a light reflectance value (LRV) difference of more than 30 points. With a 70mm tread and a 56mm riser, this profile has the geometry for that clause. Contrast comes from your choice of insert against the floor, and Building Control signs off the installed stair.

Grip that is measured, not claimed

The High Grip insert has a textured PVC face on a PET base. In pendulum testing at an independent laboratory it scored 95 dry and 60 wet. UK Slip Resistance Group guidance treats 36 and above as low slip potential, so the wet figure clears that line by a wide margin. One full-width strip sits on the step edge, exactly where feet land as people come down the stair.

Pick the insert by LRV

Partially sighted people find a stair by the edge that stands out from the floor. Obsidian (LRV 1.80) suits pale floors and Solar (LRV 55.10) suits mid and dark floors. Aim for a difference of more than 30 LRV points.

Ramped for hard floors

The rear edge tapers down to the floor, so LVT, engineered wood and vinyl finish against it without a raised edge. On stairs that do not need a 56mm riser band, the 70 x 32mm ramp back is the lighter version. For carpet and lino, see the 56 x 56mm DDA square profile.

Nine finishes

Mill Finish is plain aluminium for service and back-of-house stairs. Bright Polished and Satin Silver give a bright or soft silver line. Satin Gold, Satin Bronze, Dark Bronze and Satin Black suit timber-effect, stone-effect and dark floors. Mirrorflect Silver and Mirrorflect Gold are mirror-bright for reception and front-of-house stairs.

• Ramp back aluminium profile, 70mm tread x 56mm riser, 3.5mm gauge
• Textured High Grip insert: pendulum 95 dry, 60 wet
• Obsidian (LRV 1.80) or Solar (LRV 55.10)
• 9 finishes, 3 stock lengths, for vinyl, LVT, wood and other hard flooring

Where it's used

Accessible stairs in hard-floored public and commercial buildings: hospital and clinic entrances, hotels and restaurants, galleries and museums, civic buildings, offices and retail, finished in LVT, wood, laminate or vinyl.

Specifications

Choosing the right option

Insert colour. Pick for contrast. Solar on mid-grey, blue, green and dark floors; Obsidian on pale floors such as light grey, beige or white. Both colours are the same price.

Finish. Mill Finish is the lowest price, then Bright Polished, then Satin Gold. Dark Bronze, Satin Black, Satin Silver and Satin Bronze share the middle price. Mirrorflect Silver comes next. Mirrorflect Gold costs the most. Satin finishes hide scuffs best on busy stairs.

Length. Measure every step, then choose the stock length that cuts into those widths with the least waste. Order a spare where widths vary.

Dry, decorative stair? The same profile is available with standard PVC inserts in 19 colours.

Installation, use & care

Cut each length to the step width with a fine-toothed blade for aluminium and de-burr the ends. The step must be clean, dry and sound. Screw-fix through the channel with fixings to suit the substrate, or bed the profile on a stair nosing adhesive. Clean and dry the channel, peel the backing from the self-adhesive insert and press it firmly into place over the fixings. Lay the floorcovering up to the ramped back so it finishes flush. Sweep and damp-mop the insert regularly, because trodden-in dirt fills the texture and reduces grip. Avoid abrasive pads on polished and coloured finishes.

Frequently asked questions

How slip-resistant is the High Grip insert?

The pendulum test results for this insert are 95 dry and 60 wet, measured at an independent friction-testing laboratory. Under UK Slip Resistance Group guidance, a pendulum value of 36 or more indicates low slip potential, so the insert stays well above that line when wet. The figures apply to a clean insert, so keep the textured face free of dirt and polish build-up.

Does this nosing meet the 55mm contrast requirement?

Its geometry does: 70mm on the tread and 56mm on the riser, against the 55mm minimum in Approved Document K clause 1.7a. Choose an insert at least 30 LRV points away from your floor, and Building Control signs off the finished stair.

Can I use this nosing outside?

No. The High Grip insert is rated for internal use, with a service temperature range of -10°C to 80°C. For external steps, choose a profile with an exterior-grade insert, which is listed separately.

Which floors is the ramped back designed for?

Vinyl, LVT, wood and other hard flooring. The ramp gives a smooth step down from the nosing to the floor without a lip. For carpet or lino, the square DDA profile is the better fit.

Obsidian or Solar: which insert colour should I choose?

Choose by contrast with the floor, not by matching it. Obsidian has an LRV of 1.80 and Solar 55.10. Aim for a difference of more than 30 LRV points between the insert and the surrounding floor: Solar for mid and dark floors, Obsidian for pale ones. Your floorcovering manufacturer publishes its LRV on the product data sheet.

Ordering & delivery

Each variant is one length of nosing in your chosen finish, insert colour and stock length, with the insert supplied. Screws and adhesive are not included. We deliver to UK mainland addresses; carriage and lead time are shown at checkout. Need a quantity price for a whole building? Contact us with your step count and widths.

See our full range of anti-slip stair nosings: aluminium, rubber and PVC profiles for every type of stair.