Fitting stair nosing is well within reach of anyone comfortable with a saw and a drill. The work itself is straightforward — most of the difference between a neat job and a poor one comes down to measuring properly and taking the time to dry-fit before anything is fixed down.
This guide covers both screw-fix and self-adhesive profiles, from measuring up to the final wipe down.
Before You Start
Tools: tape measure, pencil, fine-tooth hacksaw or a mitre saw with a non-ferrous blade, file, drill with masonry or wood bit, screwdriver, spirit level, cloth and mild detergent.
Fit the floor covering first. Carpet, laminate, vinyl and LVT should all be laid before the nosing goes on. The nosing sits over the covering and holds its edge down — fitting it first means doing the job twice.
Let the profiles acclimatise. If they have come in from a cold van, leave them in the room for an hour or two before cutting. This matters most with PVC, which moves more with temperature than aluminium.
Step 1: Measure Every Step
Measure the width of each step individually. Staircases are rarely perfectly square, and a difference of three or four millimetres between the top and bottom step is common in older houses. Cutting everything to one measurement taken from the middle of the flight is the most common reason a job ends up with visible gaps at one end.
Write each measurement down against the step number. Then check the depth of your floor covering — the nosing has to sit over it without rocking.
Step 2: Cut to Length
Mark the cut with a pencil and cut two or three millimetres long. It is easy to take a little more off; it is impossible to put it back.
Use a fine-tooth hacksaw or a mitre saw with a blade suited to the material. Cut slowly and let the blade do the work — forcing it will tear the edge, particularly on PVC. Support the profile close to the cut so it does not flex.
Run a file along the cut end afterwards to take off the burr. On anodised aluminium, file away from the finished face so you do not scratch it.
Step 3: Dry-Fit
Place each profile on its step without fixing anything. Check three things:
- It sits flat along the whole length, with no rocking.
- Both ends finish flush with the sides of the step, or with an even gap if the staircase is open.
- It covers the edge of the floor covering fully.
If a profile rocks, the step edge underneath is uneven — deal with that now rather than tightening screws down onto it, which will bend the profile and leave a visible dip.
Step 4a: Fitting Screw-Fix Profiles
Screw-fix is the stronger method and the right choice for stairs in daily use, older stairs, and anywhere the nosing has to meet a specification.
- With the profile in position, mark the fixing points through the holes with a pencil.
- Lift the profile away and drill the marked points. Use a masonry bit for concrete steps and a wood bit for timber, and insert the plugs supplied.
- Reposition the profile and start the screws by hand.
- Tighten from the centre outwards, a little at each fixing in turn — the same principle as a wheel. Working from one end to the other pushes any slack along the profile and it ends up bowed.
- Snug is enough. Overtightening dishes the profile between fixings and can strip a plug in soft timber.
Step 4b: Fitting Self-Adhesive Profiles
Self-adhesive profiles need no drilling, which makes them useful in rented properties and quick refurbishments — but they depend entirely on the surface underneath.
- Clean the step edge thoroughly. Dust, polish residue and cleaning product films will all stop the bond taking. Wipe with a mild detergent, then let it dry completely.
- Check the surface is flat. Adhesive backing cannot bridge a gap; where the profile does not touch, it will not hold.
- Peel back a few centimetres of the backing at one end, position that end precisely, then press down as you peel the rest away. Once it touches, it does not reposition easily.
- Apply firm pressure along the whole length, working from the centre outwards.
- Leave the stairs alone for as long as the adhesive needs to reach full strength. Light use the same day is usually fine; heavy traffic is better left overnight.
Cold works against you here. Adhesive bonds poorly below about 10°C, so warm the room before fitting in winter.
Step 5: Corners and Open Sides
On a staircase open at one or both sides, the cut end of the profile is visible, so it is worth taking extra care over the finish. File the end square and smooth, and check it lines up with the ones above and below — the eye picks up a stepped edge running up a flight very quickly.
Where a landing meets a flight, a landing trim or angle profile gives a neater junction than butting two nosings together.
Step 6: Clean Up and Check
Wipe each profile with a damp cloth and mild detergent. On anodised aluminium, avoid abrasive pads, scouring cream and anything containing bleach or strong solvent — these attack the anodised layer, and the damage is permanent.
Then walk the flight. Every profile should feel solid underfoot with no movement or click. A profile that moves now will only get looser.
Common Mistakes
Measuring one step and cutting them all. The single most common error, and it shows at the ends.
Fixing before dry-fitting. Problems that take a minute to solve beforehand take an hour to undo afterwards.
Tightening screws end to end. Always work from the centre out.
Self-adhesive on a dusty or uneven edge. It will hold for a week and then lift at one end.
Choosing a profile too shallow for the covering. Measure the floor covering depth before ordering, not after.
Choosing the Right Profile
If you have not ordered yet, the profile depends mainly on your floor covering and how much traffic the stairs take. Our full range of stair nosing covers aluminium, PVC, LED and rubber-insert profiles for domestic and commercial staircases.
For a hard-wearing finish on stairs in daily use, see aluminium stair nosing. For the highest grip in schools, offices and public buildings, see stair nosing with rubber inserts.
Not sure which size you need? Call us on 07452 792 733 or send us your measurements — we also offer a cut-to-length service.