Sofa Seat Cushion Replacement Service Guide Scope of Works Inspect sofa, measure covers and note foam grade, density and fire‑safety labels. Remove old cushion ...
Sofa seat cushion replacement in the UK typically costs £60–£250 per cushion, depending on size, foam grade and whether the cover is being replaced or just the filling. For a typical 3-seat sofa, replacing all seat cushions runs £200–£600 total — far cheaper than a new sofa, and often what's needed when the rest of the frame is fine but the cushions have collapsed.
Cushions wear out in 5–10 years on most sofas. The seat takes 80% of the daily load, so it's the seat cushions that fail first while the back and arms remain fine. Replacement is easier than people assume.
Typical UK costs
| Service | Typical price |
|---|---|
| New foam insert (standard density) | £60–£140 per cushion |
| New foam insert (high density / firm) | £90–£180 per cushion |
| Reflex foam + fibre wrap | £100–£200 per cushion |
| Feather and down (luxury fill) | £140–£300 per cushion |
| New zipped cover (existing fabric) | £60–£140 per cushion |
| Full cushion remake (cover + filling) | £150–£400 per cushion |
| Whole-sofa cushion refresh (3-seat) | £200–£600 |
| Sofa frame inspection / repair | £80–£250 |
Diagnosing cushion problems
- Feels flat / sinks — foam has lost recovery. Most common; fix is new foam.
- Lumpy or uneven — typically fibre/feather fill that's clumped. Either re-fluff (temporary) or replace with foam-core construction.
- Cushion shifts forwards — likely fabric stretch or cover too loose; covers may need re-zipping or cushion shape changing.
- One side higher than other — uneven wear. Replace both cushions, even if only one is bad — they age differently after that.
- Cover sagging or torn — the cover itself needs replacing; foam inside may be fine.
Foam densities — picking the right one
Foam grade is specified by density (kg/m³) and firmness. The two move somewhat independently but density drives lifespan more than firmness:
- Standard density (24-30 kg/m³) — budget. 5-7 year lifespan. Fine for occasional use.
- High-density (35-40 kg/m³) — typical for premium UK sofas. 8-12 year lifespan. Best balance for most homes.
- Reflex / latex / pocket-spring core — premium feel, longest lifespan (10-15+ years). 30-50% more expensive.
- Feather and down wrap over foam core — luxury feel, requires periodic re-plumping. Best for occasional-use formal living rooms.
How replacement works
For a typical UK sofa with zipped cushions:
- Unzip the cover and remove old foam.
- Measure the cushion (width × depth × height) — old foam often shrinks; measure the cover from the inside.
- Choose foam grade based on use case.
- New foam cut to size by a foam supplier or sofa specialist.
- Wrap foam in dacron / polyester fibre for softer feel and to prevent the cover sagging.
- Insert into cover, zip up.
Many specialists offer a measuring + supply + fit service for £60–£140 per cushion. DIY foam kits (online suppliers like FoamForYou or Direct Foam) are cheaper but require careful measurement.
Things people often miss
- Replace all seat cushions together — even if only one is bad. New foam alongside aged foam looks and feels noticeably different.
- Check back cushions while you're there — back cushions wear more slowly but often need re-fluffing or new fillings every 10-15 years.
- Frame inspection — a sagging seat can be a sagging frame, not just foam. Lift the cushions, push down on the deck below — if it gives more than 1-2 cm under hand pressure, the frame webbing may have failed.
- Cushion zip quality — cheap zips fail before the foam does. Worth upgrading to a heavy-duty YKK zip when re-covering.
- Fire labels — UK Furniture and Furnishings (Fire Safety) Regulations 1988 require fire-retardant fillings. Reputable foam suppliers comply by default; check labels match if you're worried about insurance.
Frequently asked questions
How long should sofa cushions last?
Standard density foam: 5-7 years of daily use. High-density foam: 8-12 years. Pocket-spring or reflex cores: 10-15+ years. Feather and down: indefinitely with regular plumping (the feathers don't degrade).
Can I just buy foam online and fit it myself?
Yes — UK foam suppliers cut to size and ship by next day. Cost £40-£90 per cushion. Pros: cheaper. Cons: get the measurements wrong and you've bought useless foam. Specialist services include measuring, cutting and wrapping in fibre for a much better finish.
Should I replace the cover at the same time?
If the cover is showing wear (worn arms, faded back) or you've gone off the colour, yes — it's a small marginal cost on top of the foam. If the cover looks fine, just replace the filling.
Why do my back cushions need different treatment?
Back cushions take much less weight than seat cushions, so foam doesn't compress the same way. Most back cushions use fibre fill (polyester or feather/fibre mix) rather than solid foam — they need re-fluffing every few years rather than full replacement.
Is it worth replacing cushions on a cheap sofa?
Borderline. £200-£600 in new cushions on a sofa that originally cost £400 is uneconomic. On a £1,500+ sofa with sound frame, almost always worth it — saves the price of a comparable new sofa.
Will new foam smell?
Slightly, for the first 1-2 weeks. Air the cushions in a well-ventilated room before use. The smell is the foam off-gassing residual chemicals from manufacturing — non-toxic but noticeable.
Want a local pro to handle this? A sofa cushion specialist or upholsterer will measure, source the right foam grade, and fit cleanly. The £200-£600 spend on a 3-seat refresh is the highest-leverage furniture repair you can do — gets a sagging sofa feeling new again at a fraction of replacement cost.
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.
