How to Install a Stair Runner — Complete Step-by-Step Guide

Tools and materials

Runner, cut to length with bound edges
Underlay / carpet pad cut to runner width minus 1in
Tackless strip (gripper) and a stapler with 1/2in staples
Knee kicker or carpet tucker, sharp knife, chalk line, tape measure
Pencil, square, dust mask, knee pads

Step 1 — Prepare the staircase

Remove any old carpet, gripper, staples and tack strip. Screw down any tread that squeaks — you will never get another chance this easy. Fill and sand obvious damage, and vacuum thoroughly; grit trapped under a runner acts like sandpaper from below.

Step 2 — Mark your centre line

Measure the width of each tread and mark the centre. Snap a chalk line, or mark both runner edges on every tread, so the reveal stays even up the flight. On out-of-square staircases, favour a visually straight line over a mathematically centred one.

Know your numbers in 30 seconds

Enter your step count, tread depth and riser height — the stair runner calculator gives you the exact length to order, in metres and feet, with waste included.

Open the stair runner calculator

Step 3 — Fit gripper and underlay

Fix tackless strip across the back of each tread and at the base of each riser, pins angled towards the crease, leaving a gap of roughly the runner thickness between the two. Cut underlay to the width of the runner less about an inch, and staple it over each tread so it wraps the nosing.

Step 4 — Start at the top

Work top down. Fold the raw end under, align it to your centre marks, and staple it into the crease at the back of the top tread. Working downwards keeps the pile running down the stairs, which is how it should lie — it wears better and looks darker and richer from below.

Step 5 — Tension and staple each step

Pull the runner firmly down over the nosing.
Push it hard into the crease where riser meets tread with a tucker or bolster.
Staple into the crease, 3–4in apart, angling staples into the timber.
Add a staple just under the nosing on each side if the runner lifts.
Check your centre marks before moving to the next step.

Tension is everything

A runner that is loose on the nosing will ripple within a month and wear through within a year. If a step looks slack, pull the staples and redo it — it takes two minutes now and a full refit later.

Step 6 — Finish the bottom

At the bottom step, decide whether the runner stops at the base of the last riser or wraps over a bullnose step. Fold the end under twice for a clean edge, tension it, and staple through the fold. A bullnose or curtail step usually looks best with the runner stopping on the tread above it.

Common DIY mistakes

Mistake	Fix
Working bottom to top	Start at the top so the pile lies downwards
Not enough staples on the nosing	Staple every 3–4in, both in the crease and under the lip
Underlay running to the runner edge	Cut it 1in narrower so it never shows
Cutting the runner to final length early	Leave excess at the bottom and trim last

Whatever you decide, get the numbers first: the stair runner calculator doubles as a stair runner length calculator, adding nosing wrap, landings, winders, pattern repeat and waste so you order the right length the first time.

Frequently asked questions

Do you start a stair runner at the top or bottom?

Start at the top and work down. This keeps the pile direction running downwards, which wears better, looks richer from the bottom of the flight, and lets you trim the excess at the bottom step.

Do I need underlay under a stair runner?

Yes. Underlay absorbs the impact on the nosing, where nearly all stair wear happens, and it is the cheapest way to make any runner last longer and feel better underfoot.

Can you install a stair runner without staples?

Stair rods with gripper can hold a runner without visible staples, and adhesive systems exist, but staples into the crease remain the most secure and the standard professional method.