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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 15mm 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 15mm-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.
15mm is the middle of the narrow range. It carries noticeably more grip area than a 10mm strip while still reading as a discreet line rather than a warning band, which makes it the usual choice for a single strip on a domestic or light commercial going.
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 | 15 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 cost, you truly get a custom fit that really matches up well. I needed something for the stairwell leading into my apartment block, and the trim sat neatly with the existing floor tiles without any unevenness or lifting. After installation, it’s stayed in place through some heavy foot traffic and rainy days—just as robust as hoped for. Thoughtfully cut to adapt precisely where Id asked, making this a great choice if you’re trying to align bespoke needs with practicality.
Works a treat at the entrance to my building—sturdy enough and cut to an absolutely precise fit without breaking the bank! Each of these fitted inserts hits the mark thanks to their spot-on grip, even with wear from daily foot traffic. If youre after quality for any project like mine, it surely stands out value-wise.
Needed a smart solution for the bustling library entrance, and this sturdy strip delivered brilliantly. Custom-cut to fit just right across our wide steps, it hasnt budged despite the constant foot traffic and autumn rain—Id gladly order more next time!
Arrived just on time, fitting perfectly into the hotel steps. The carborundum made each step incredibly secure even with a constant flow of guests in and out underfoot. Ive noticed it handles any wetness really well, keeping people stable without ever needing extra care. Super happy with the value considering how busy our lobby gets!
Took a punt on this carborundum insert for the stairwell at my office. You wouldn’t believe how smoothly it arrived and packaged snugly too! Snip to fit ideas great, no end in sight after weeks with so much bustle underfoot; cant honestly think of any downsides with it doing its job brilliantly.
Installed it a few months back and its held up beautifully despite all the rain we’ve had. The carborundum strips were cut to size perfectly for our garden stairs, and they haven’t shifted or shown wear from regular use. Its been great walking up the steps knowing they’re as reliable now as when first fitted.
Got this for the front steps at my building, and Ive got to say, the finish is really slick. The custom length fits seamlessly, lending a neat appearance without any awkward gaps as you often see with standard cuts. Any dirt is easy to brush away thanks to its surface texture—such a clever design touch!
Absolutely spot on for what I needed, these steps. Cutting it to size was a breeze, and getting it flush gave me that neat look in our office entryway. No gaps, sensible fit, and wasnt any faff at all with using it; reliable as anything Ive tried before. Just makes my life easier, really.
