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Refurbish your conservatory.
New roof, replacement glazing, frames re-painted, base repair — refresh without replacing.
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Top tips
Hiring a conservatories, without the regret.
Four moves that separate a smooth job from a nightmare.
Wrong-brand parts
Conservatory systems are proprietary. Using generic seals or capping voids the original warranty.
Hiding rather than fixing
Cheap quotes silicone over leaks rather than addressing the cause. Fail in 6–18 months.
Repaint over flaking
Existing flaking paint must be stripped first. Painting over it is short-lived.
Underestimating the work
A full refurb of seals, frame paint, roof and doors can equal half the cost of a new conservatory. Calculate whether replacement is better value.
Costs & timeline
Know what it costs. Know when it ends.
Indicative UK ranges and a typical week-by-week schedule.
Cost range
By job type
Inc. VAT · 2026
Source: NMT quotes
Source: NMT quotes
Replace bar capping seals (4 sides)EPDM strips
£250–£650
Re-seal box gutter to wallFlashband or lead replacement
£250–£800
Repaint uPVC framesPlastic primer + 2 coats
£800–£2.5k
Replace polycarbonate roof with glassSelf-cleaning solar-control
£2.5k–£6.5k
Lightweight tiled roof retrofitBest value-add
£4.5k–£15k
Upgrade single-glazed sidelightsTo double-glazed Argon-filled
£1.2k–£4k
!
Quote spread is typically ± 18% — always get 3 quotes.
Timeline
Mid-size conservatory · week by week
Typical
5 phases · 5 wk
5 phases · 5 wk
W1
W2
W3
W4
W5
Foundations + dwarf wall
Frame + glazing
Roof + ridge
Electrics + flooring
Snags + handover
!
Schedule slips on dependencies — pad each phase by 10–20% for real-world delays.
At a glance
Infographic · VideoThe Conservatories briefing.
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Video guide
Conservatories explained
Tired, leaking or hot/cold conservatories can be refurbished for a fraction of full replacement. Expect to pay £450–£8,000 for a UK conservatory refurbishment depending on which elements need attention. The single best upgrade is usually the roof.
What Does the Work Involve?
The fitter assesses the conservatory — diagnosing leaks, identifying perished seals, checking frame integrity, testing the roof and gutter system. Typical refurbishment work includes: replacing perished EPDM bar capping seals, re-sealing box gutters, replacing or re-bedding wall flashing, repainting tired uPVC frames, swapping cheap polycarbonate roof for self-cleaning glass or lightweight tiles, upgrading single-glazed sidelights to double-glazed, fitting roof vents for ventilation.
Typical Costs
| Item | Low (£) | High (£) | Notes |
|---|---|---|---|
| Replace bar capping seals (4 sides) | 250 | 650 | EPDM strips |
| Re-seal box gutter to wall | 250 | 800 | Flashband or lead replacement |
| Repaint uPVC frames | 800 | 2,500 | Plastic primer + 2 coats |
| Replace polycarbonate roof with glass | 2,500 | 6,500 | Self-cleaning solar-control |
| Lightweight tiled roof retrofit | 4,500 | 15,000 | Best value-add |
| Upgrade single-glazed sidelights | 1,200 | 4,000 | To double-glazed Argon-filled |
| New French/bi-fold doors | 1,500 | 5,500 | Replace tired existing |
How Long Does It Take?
Seal/gutter repairs: 1–2 days. Frame repaint: 3–5 days. Roof replacement: 4–7 days. Multiple items combined: 2–4 weeks.
DIY or Professional?
Professional. Working on conservatory roofs is dangerous (slippery, fragile), and seal/flashing repairs require specialist tape and silicone. DIY attempts with generic silicone fail in 6–18 months.
Choosing the Right Tradesperson
Use a conservatory specialist familiar with the brand of conservatory you have (Ultraframe, Eurocell, Synseal, Liniar) — proprietary parts differ. Ask for a written assessment of the conservatory's condition with itemised repair recommendations.
UK Regulations
Like-for-like repairs aren't notifiable. Major upgrades (tiled roof retrofit, glazing upgrade with significantly improved U-value) may be Building Regs notifiable. The installer should advise.
Common Problems
- Wrong-brand parts: Conservatory systems are proprietary. Using generic seals or capping voids the original warranty.
- Hiding rather than fixing: Cheap quotes silicone over leaks rather than addressing the cause. Fail in 6–18 months.
- Repaint over flaking: Existing flaking paint must be stripped first. Painting over it is short-lived.
- Underestimating the work: A full refurb of seals, frame paint, roof and doors can equal half the cost of a new conservatory. Calculate whether replacement is better value.
Frequently Asked Questions
Repair or replace my old conservatory?
If the frames are sound and the build is structurally OK, refurb. If foundations are cracking, base brickwork is failing, or the frame system is over 25 years old and parts are obsolete — replace.
How much does refurbishment cost vs new?
Refurb is 20–40% of a new build cost. £4,000 to refurb a £15,000 new equivalent is typical.
Can I just paint the uPVC frames?
Yes — with proper plastic primer and oil-based eggshell. Adds 5–10 years to the visual life. Doesn't fix structural issues or thermal performance.
What's the most cost-effective upgrade?
Lightweight tiled roof retrofit. Transforms thermal performance, year-round usability, and resale value for £4,500–£15,000.
Will refurb cause planning issues?
Generally no — like-for-like repairs don't need planning. Major changes (roof material, door type) may need consent in conservation areas.
How long does a refurbished conservatory last?
A good refurb extends the conservatory life 15–20 years. Refurbishing every 12–15 years is the typical lifecycle for premium installs.
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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