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Stair treads are rarely a round number, and an insert cut a few millimetres short leaves a gap that fills with grit and lifts at the end. This is the same 35mm carborundum insert as our 1m, 1.5m and 2m stock lengths, cut here to the exact millimetre you specify between 250mm and 2000mm, tolerance plus or minus 5mm.
A 35mm-wide strip of aluminium oxide grit bonded into a resin matrix, set in a carrier that beds into a routed groove or fixes to the tread surface. Carborundum is the hardest of the common anti-slip infills: it does not burnish out under footfall the way a soft PVC insert eventually does, which is why it is specified for entrances, plant rooms, external steps and any stair walked on in wet boots.
35mm is a broad grip band. It is the width to specify on deep goings, on heavily used public stairs, and where a risk assessment has asked for more contact area than a single narrow strip provides.
Cutting carborundum on site is slow and unpleasant: the grit destroys a fine-toothed blade and the dust is abrasive. Cutting in a workshop keeps the ends square and the grit intact right to the end of the strip, so it beds cleanly instead of rocking on a burr. On a stair where every going differs, that is the difference between a day of measuring and cutting and an afternoon of fixing.
| Insert width | 35 mm |
| Anti-slip infill | Carborundum (aluminium oxide grit in resin) |
| Cut length range | 250 mm to 2000 mm, tolerance +/- 5 mm |
| Colours | 12, including four speckled and stone-effect finishes |
| Fixing | Bedded in adhesive into a routed groove, or screw fixed |
| Application | Internal or external |
| Manufactured | United Kingdom |
Measure each tread individually rather than assuming a flight is consistent, and take 3mm to 5mm off a wall-to-wall measurement so the strip drops in without scraping. Set the strip back at least 15mm from the front arris so the nose edge stays intact. The substrate must be clean, dry and free of laitance; bed in a bar of exterior-grade adhesive worked well into the groove and weight the strip until cured. Custom lengths are made to your figures, so they are non-returnable except for faults.
Where the insert is doing a safety job rather than a decorative one, choose a colour that contrasts in tone with the tread: obsidian on pale concrete, chalk or Portland stone on dark stone. The speckled and marble-effect colours are the ones to pick when the strip should read as part of the floor rather than as a warning line.
Cut lengths are made to order; allow additional working days over a stock length and we will confirm a dispatch date. Standard UK mainland delivery is a flat rate. If your treads sit close to 1m, 1.5m or 2m, the stock listing linked above will reach you sooner.
| 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 8 reviews.
At this price, theres no simpler way to enhance the safety and style of stone steps. I used the cut-to-size piece for an outdoor area where the carborundum blends perfectly with the existing paving, sitting snugly with ease—like its always been there. The ability to order the any length made it a cinch to get just what I needed, without fussing over awkward gaps keeping everything sleek and secure.
Works a treat in the hotel lobby where we used it on the marble steps. It wasnt long before I realized the bespoke length option outstripped any off-the-shelf competitor—what value! Delivered ahead of time too, safely cushioned against possible damages.
Needed precise custom lengths for our warehouse stairs, and they arrived quicker than expected. Packaging was rock solid, making sure all pieces were safe. Ideal choice to enhance safety in our busy industrial setting with reliable durability.
Came in sturdy packaging which was reassuring for a product like this. Used it on the entrance stairs of our local library, especially prone to getting slippery after rain. Sturdy enough and grips well, even with all that water and leaf clutter—you’d forget the any thunderstorm was ever there!
Wasnt sure at first how the fit with these would turn out, but delivery was fast and everything came neatly packed. Snapped it onto some granite steps in our office lobby to keep things safe and secure. Dont see much wear after a month, just straightforward quality that does the trick without any extra fuss.
Got this for some stone steps leading into a busy shopping centre. The finish of the insert stops them looking unkempt and fits snugly because they cut it to the exact size. It stands up well against all the foot traffic and you can definitely feel the solid weight underfoot.
Installed it in our apartment stairway months ago and its held up superbly. Unlike others Ive tried, this tread fits precisely, with no irritating edge gaps collecting grime. Im pleasantly surprised at how well the grip has endured heavy foot traffic without showing any wear.
Robust fitting for my stairway. Ordering the any length I needed without hassle was excellent, and it arrived neatly packaged speedily. Once cut to size, it installed perfectly on my outdoor step and has stayed firm despite the regular foot traffic at our local library. A breeze to measure out and fix in place!
