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Re-glaze a greenhouse.
Cracked, missing or storm-damaged greenhouse glass — supplied, cut and clipped in place.
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Wrong glass spec
Standard glass fails in conservatory. Laminated for safety, solar control for heat.
Polycarbonate yellowing
Cheap polycarbonate yellows in UV in 8-12 years. Quality (PolyCarb Plus) lasts 20+ years.
Sealant failure
Old sealants degrade. Water ingress. Re-glazing solves.
Heat shock
Hot summer sun heats glass. Cool rain shock cracks. Quality install resists.
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
Standard greenhouse glass per m²4mm horticultural
£20–£60/m²
Polycarbonate replacement per m²Twin-wall lightweight
£15–£50/m²
Conservatory glass per m²6-8mm laminated
£60–£200/m²
Solar-control conservatoryPer m², premium
£80–£250/m²
Replacement pane (single)Per pane
£40–£200
Polycarbonate replacementPer pane
£30–£150
!
Quote spread is typically ± 18% — always get 3 quotes.
At a glance
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Greenhouse glass — for greenhouses, conservatories, and orangeries — has specific requirements. Heat-resistant, durable, sometimes self-cleaning. Expect to pay £20–£200 per m² for UK greenhouse glass.
What Does the Work Involve?
Specialist measures structure. Standard glass: 4-6mm horticultural for greenhouses. 6-8mm laminated/toughened for conservatories. Heat-resistant treatment for orangery glass. Beaded into frames. Sealant essential. UV-stable for long life.
Typical Costs
| Item | Low (£) | High (£) | Notes |
|---|---|---|---|
| Standard greenhouse glass per m² | 20 | 60 | 4mm horticultural |
| Polycarbonate replacement per m² | 15 | 50 | Twin-wall lightweight |
| Conservatory glass per m² | 60 | 200 | 6-8mm laminated |
| Solar-control conservatory | 80 | 250 | Per m², premium |
| Replacement pane (single) | 40 | 200 | Per pane |
| Polycarbonate replacement | 30 | 150 | Per pane |
| Full conservatory glass set | 1,500 | 5,500 | Re-glazing |
How Long Does It Take?
Single pane: 1-2 hours. Full conservatory re-glazing: 1-2 days. Lead time 2-4 weeks.
DIY or Professional?
DIY-friendly for greenhouses. Conservatory glazing professional.
Choosing the Right Tradesperson
Greenhouse specialist or general glazier. Conservatory company for premium.
UK Regulations
BS 6206 Class A or B for safety glass in conservatories (within 800mm of floor). No specific regulation for horticultural greenhouse.
Common Problems
- Wrong glass spec: Standard glass fails in conservatory. Laminated for safety, solar control for heat.
- Polycarbonate yellowing: Cheap polycarbonate yellows in UV in 8-12 years. Quality (PolyCarb Plus) lasts 20+ years.
- Sealant failure: Old sealants degrade. Water ingress. Re-glazing solves.
- Heat shock: Hot summer sun heats glass. Cool rain shock cracks. Quality install resists.
Frequently Asked Questions
Glass or polycarbonate for greenhouse?
Polycarbonate: cheaper, lighter, less breakable, slightly less light. Glass: traditional, more light. Polycarbonate increasingly popular.
Conservatory roof replacement?
Full re-glazing £1,500-£5,500. Often upgrade old polycarbonate to glass.
Self-cleaning glass conservatory?
Yes — Pilkington Activ. Self-cleaning coating reacts to UV. Reduces cleaning frequency.
How long does greenhouse glass last?
Standard glass: 30+ years. Quality polycarbonate: 20-25 years. UV degrades polycarbonate over time.
Toughened safety in conservatory?
Mandatory within 800mm of floor (Part K). Toughened laminated for safety.
Cost vs solid roof conservatory?
Glass: light, transparent, expensive. Solid roof: insulated, less light. Trend toward solid roof conversions.
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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