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Install a glass roof.
Roof lantern, skylight or full glass roof — supplied, fitted and weather-sealed to Building Regs.
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Costs, timelines, pitfalls and the right questions to ask before any glazier starts on glass Roofs.
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Overheating in summer
Standard glass amplifies heat. Solar control glass essential.
Condensation in winter
Triple-glazed prevents condensation. Insulation continuity at edges.
Cleaning difficulty
Roof glass hard to clean. Self-cleaning glass premium investment.
Birds and debris
Glass roofs attract birds. Bird deterrents and regular cleaning.
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 roof light (Velux)Per window
£800–£2.5k
Premium lantern (Korniche, Roof Maker)Per lantern
£1.5k–£5.5k
Glass roof per m²Standard install
£400–£1.2k/m²
Premium glass roof per m²Frameless designer
£800–£1.5k/m²
Walk-on glass roof per m²Premium structural
£1.2k–£2.5k/m²
!
Quote spread is typically ± 18% — always get 3 quotes.
At a glance
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Glass roofs bring natural light into modern homes — roof lights, lantern, full glass roofs. Expect to pay £400–£1,500 per m² for UK glass roof installation.
What Does the Work Involve?
Architect designs glass roof. Structural support (steel typically). Aluminium frames or frameless glazing. Multi-pane laminated/toughened glass. Heat-resistant solar control glass. Skylight or full architectural feature. Building Regs notification.
Typical Costs
| Item | Low (£) | High (£) | Notes |
|---|---|---|---|
| Standard roof light (Velux) | 800 | 2,500 | Per window |
| Premium lantern (Korniche, Roof Maker) | 1,500 | 5,500 | Per lantern |
| Glass roof per m² | 400 | 1,200 | Standard install |
| Premium glass roof per m² | 800 | 1,500 | Frameless designer |
| Walk-on glass roof per m² | 1,200 | 2,500 | Premium structural |
| Solar control glass premium | +£50 | +£200 | Per m² |
| Self-cleaning glass premium | +£30 | +£150 | Per m² |
How Long Does It Take?
Standard lantern: 2-3 days. Premium glass roof: 1-2 weeks. Lead time 6-12 weeks custom.
DIY or Professional?
Specialist glass roof installer or main contractor. Architect and structural engineer essential.
Choosing the Right Tradesperson
Specialist company: IQ Glass, Roof Maker, Korniche, Atlas Roof. Architect for design.
UK Regulations
Building Regs Part L (thermal). Part B (fire spread). Glass to BS 6206 Class B laminated minimum for overhead. Structural design required.
Common Problems
- Overheating in summer: Standard glass amplifies heat. Solar control glass essential.
- Condensation in winter: Triple-glazed prevents condensation. Insulation continuity at edges.
- Cleaning difficulty: Roof glass hard to clean. Self-cleaning glass premium investment.
- Birds and debris: Glass roofs attract birds. Bird deterrents and regular cleaning.
Frequently Asked Questions
Glass roof vs roof lights?
Glass roof: continuous glazed surface (premium). Roof lights: individual windows (cheaper, similar functionality).
Solar control essential?
For south-facing or large area: yes. Reduces summer overheating 60-80%. £50-£200/m² premium.
Self-cleaning glass?
Yes — Pilkington Activ or AGC Easy Pro. Coating reacts to UV to break down organic matter. Worth it for inaccessible roof glass.
How long does glass roof last?
Quality install: 25-40 years. Toughened glass virtually indefinite. Seals may need attention at 15-25 years.
Walk-on glass?
Yes — multi-layer laminated to take walking load. Premium £1,200-£2,500/m². For roof terraces.
Cost vs traditional ceiling?
5-10x standard ceiling cost. Premium feature transforms internal space.
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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