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Clean & maintain your conservatory.
Roof, frames, gutters and glazing — annual deep clean keeps it looking new and the seals working.
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Hiring a conservatories, without the regret.
Four moves that separate a smooth job from a nightmare.
Algae build-up on shaded roof
North-facing or tree-shaded roofs grow green algae. Annual clean prevents permanent staining.
uPVC yellowing
South-facing uPVC yellows over 8–12 years. Specialist restorer (Owatrol, ProClean) recovers most of the original colour.
Bird mess on glass roof
Particularly common where there are trees overhead. Hose-down + soft brush works; avoid pressure washing (damages seals).
Pressure-washing damage
Cheap cleaners using pressure washers blast out the EPDM seals around glazing. Insist on water-fed pole or hand-clean only.
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
External glass clean (small)Lean-to / Edwardian small
£60–£120
External glass clean (medium)Victorian / Edwardian
£80–£160
External glass clean (large/P-shape)Multi-style
£140–£280
Internal glass cleanOften included
£40–£120
uPVC frame deep cleanRestores yellowed white
£80–£250
Gutter clean (conservatory eaves)Often included
£40–£120
!
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
A conservatory is one of the highest-value but most-neglected areas of UK homes. Annual cleaning and inspection keeps it looking and performing well — and catches issues before they become expensive. Expect to pay £60–£350 for a UK conservatory clean and inspection.
What Does the Work Involve?
The cleaner washes the external glass roof (water-fed pole reaches the apex from ground level), cleans the gutters and downpipes, inspects the bar capping seals and box gutter, washes the uPVC frames internally and externally (specialist uPVC cleaner removes algae, mould and yellowing), cleans the polycarbonate or glass roof panels internally, and reports any seal or frame issues found.
Typical Costs
| Item | Low (£) | High (£) | Notes |
|---|---|---|---|
| External glass clean (small) | 60 | 120 | Lean-to / Edwardian small |
| External glass clean (medium) | 80 | 160 | Victorian / Edwardian |
| External glass clean (large/P-shape) | 140 | 280 | Multi-style |
| Internal glass clean | 40 | 120 | Often included |
| uPVC frame deep clean | 80 | 250 | Restores yellowed white |
| Gutter clean (conservatory eaves) | 40 | 120 | Often included |
| Full annual service package | 180 | 500 | Clean + inspection + minor seal renew |
How Long Does It Take?
External clean: 1–2 hours. Full inside-outside clean: 2–4 hours. Annual service with seal inspection: half a day.
DIY or Professional?
Internal cleaning is DIY. Roof cleaning needs water-fed pole or careful ladder/scaffold — most homeowners hire a professional for safety. Frame deep-cleaning needs specialist uPVC restorer chemical.
Choosing the Right Tradesperson
A window cleaner with conservatory experience, or a conservatory specialist. Ask whether they include inside-outside, gutters, and frame washing. For annual service packages, get a written list of what's included.
UK Regulations
Working at Height regulations apply to paid trades. No specific regulations for cleaning itself.
Common Problems
- Algae build-up on shaded roof: North-facing or tree-shaded roofs grow green algae. Annual clean prevents permanent staining.
- uPVC yellowing: South-facing uPVC yellows over 8–12 years. Specialist restorer (Owatrol, ProClean) recovers most of the original colour.
- Bird mess on glass roof: Particularly common where there are trees overhead. Hose-down + soft brush works; avoid pressure washing (damages seals).
- Pressure-washing damage: Cheap cleaners using pressure washers blast out the EPDM seals around glazing. Insist on water-fed pole or hand-clean only.
Frequently Asked Questions
How often should I clean my conservatory?
External roof: twice a year (spring and autumn). External frames: annually. Internal glass: monthly to quarterly depending on use. Annual professional clean is the minimum recommendation.
Will self-cleaning glass stay clean?
Reduces cleaning frequency significantly — still needs annual hand clean for bird droppings, pollen, etc.
Can yellowed uPVC be restored?
Yes — specialist uPVC restorer (Owatrol, ProClean Restorer) recovers most of the original white. Costs £80–£250 for a small conservatory.
Should I pressure-wash my conservatory?
No — high-pressure damages the EPDM seals between glazing and frames, leading to leaks. Use water-fed pole (low-pressure soft brush) or hand-clean only.
What's the best uPVC cleaner?
Specialist uPVC cleaners — HG, ProClean, Owatrol. Avoid bleach or abrasive cleaners which damage the surface.
Do I need an annual service contract?
Optional but recommended — £180–£500 a year for clean + seal inspection. Catches issues early. Single-visit-as-needed is cheaper but you may miss problems.
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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