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Install sliding internal doors.
Wall-hung or floor-track sliders — saves floor space, looks clean, runs smooth on quality gear.
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Costs, timelines, pitfalls and the right questions to ask before any doors starts on sliding Internal Doors.
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Top tips
Hiring a doors, without the regret.
Four moves that separate a smooth job from a nightmare.
Roller wear
Cheap nylon rollers click and squeak after a year. Specify ball-bearing rollers.
Track sag
Heavy oak slabs (35–50 kg) need a track screwed to a structural header, not just plasterboard.
Pocket-door jamming
If the cassette racks, the door binds in the wall. Always pack the cassette dead square.
No latching
Sliders don't latch like hinged doors — fit an edge-pull and ball-catch on the strike.
Costs & timeline
Know what it costs. Know when it ends.
Indicative UK ranges and what affects price.
Cost range
By job type
Inc. VAT · 2026
Source: NMT quotes
Source: NMT quotes
Barn-door slab, supplyOak, pine, MDF
£180–£500
Barn-door track & hardware kitBlack steel or brushed nickel
£80–£350
Pocket-door cassette systemEclisse, Coplan
£250–£650
Pocket-door slab, supplySingle or double-pocket
£180–£700
Carpenter labour, barn-doorHalf a day
£180–£350
Builder labour, pocket retrofitOpen up wall, plaster, decorate
£800–£1.8k
!
Quote spread is typically ± 18% — always get 3 quotes.
At a glance
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Doors explained
Sliding internal doors save the swing space of a hinged door and add an architectural feature. They come in three main types: surface-mounted (barn-door style), top-hung within a cassette, or pocket doors that disappear into the wall. Expect to pay £450–£2,800 fitted in the UK depending on type and finish.
What Does the Work Involve?
Surface-mounted (barn-door) installs are the simplest — a steel track is screwed to a header rail above the opening, and the door slides on top-hung wheels. Pocket-door systems need a stud-wall cassette built into the wall during construction; retrofitting means opening up the stud wall, fitting the cassette frame, and re-plastering. Top-hung cassette systems (Eclisse, Coplan) are factory-supplied as a kit. Floor guides at the bottom stop the door swinging.
Typical Costs
| Item | Low (£) | High (£) | Notes |
|---|---|---|---|
| Barn-door slab, supply | 180 | 500 | Oak, pine, MDF |
| Barn-door track & hardware kit | 80 | 350 | Black steel or brushed nickel |
| Pocket-door cassette system | 250 | 650 | Eclisse, Coplan |
| Pocket-door slab, supply | 180 | 700 | Single or double-pocket |
| Carpenter labour, barn-door | 180 | 350 | Half a day |
| Builder labour, pocket retrofit | 800 | 1,800 | Open up wall, plaster, decorate |
How Long Does It Take?
Barn-door surface mount: half a day. Pocket-door cassette in a new stud wall: 1 day. Retrofit pocket door into an existing wall: 3–5 days including make-good plaster and decoration.
DIY or Professional?
A confident DIYer can fit a barn-door kit on a flat plaster wall. Pocket doors are professional — the cassette must be plumb and the wall thickness has to be increased to accommodate it. Solid-wall pocket-door retrofits often need a structural engineer to advise on lintels and load paths.
Choosing the Right Tradesperson
For barn doors, any competent carpenter will do. For pocket doors, use a carpenter or builder who has fitted Eclisse or Coplan systems before — these have specific tolerances that catch out the inexperienced. Get the warranty in writing on the cassette and rollers.
UK Regulations
Internal doors don't need notification. Pocket-door cassettes in load-bearing walls need a structural engineer's calculation. Fire-door regulations (FD30) apply between dwelling and integral garage, or between stair and third-storey habitable rooms — pocket doors do not satisfy fire-door requirements without specific FD30-rated systems.
Common Problems
- Roller wear: Cheap nylon rollers click and squeak after a year. Specify ball-bearing rollers.
- Track sag: Heavy oak slabs (35–50 kg) need a track screwed to a structural header, not just plasterboard.
- Pocket-door jamming: If the cassette racks, the door binds in the wall. Always pack the cassette dead square.
- No latching: Sliders don't latch like hinged doors — fit an edge-pull and ball-catch on the strike.
Frequently Asked Questions
Barn door or pocket door — which is better?
Barn doors are cheaper, simpler to fit, and let you change the door slab later. Pocket doors hide the door completely but are 3–4x as expensive and need wall thickness sacrificed.
Will a sliding door give privacy?
Less than a hinged door, because there is always a small gap at the strike side. Fit a brush seal in the jamb to reduce light and sound bleed.
How wide can a sliding door be?
Up to 1.2m for a single slab on a single track. Wider openings use double-sliding doors (one to each side) or telescopic tracks.
Can you lock a sliding door?
Yes — surface-mounted latch sets exist that engage into a strike on the jamb. For bathrooms, an indicator bolt works.
Do pocket doors need a thicker wall?
Yes — the cassette is 80–100mm thick, plus skim. Existing 100mm stud walls need to be furred out to 120–130mm to accommodate it.
Are sliding doors child-safe?
Fitting a soft-close mechanism (most quality kits have it) prevents the slammed-finger injuries that catch families with toddlers.
This guide was written with AI assistance and is intended for general information only. Prices are estimates based on UK averages and may vary by region. Always get at least three quotes and consult a qualified professional before starting any work.
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