2026 buyer's guide
Glass vs solid conservatory roof
Glass roofs are a clear upgrade on polycarbonate — but they still lose heat far faster than a fully insulated solid roof, and they bring glare, overheating and seal-failure issues of their own. Here's the honest, side-by-side comparison.
| Feature | Glass roof | Solid (Smart-Roof) |
|---|---|---|
| Typical U-value | 1.0–1.6 W/m²K | 0.15–0.18 W/m²K |
| Rain noise (heavy rain) | 55–70 dB | ≈ 35 dB (whisper) |
| Summer comfort | Hot — solar gain through glass | Comfortable, room-temperature |
| Winter comfort | Cool — radiates heat outward | Warm — usable every day |
| Glare / UV | Significant; needs blinds | None overhead |
| Self-cleaning options | Available (extra cost) | Not needed — composite tiles |
| Lifespan of seals | 10–15 years before re-sealing | 30+ years, no seals to fail |
| Typical cost | £5,000–£9,000 | £6,500–£15,000 |
Is a glass conservatory roof better than a solid one?
Only if maximum overhead daylight is your top priority. For warmth, noise reduction, year-round usability and resale value, a solid roof wins on every measure. The best of both worlds is usually a solid roof with two or three Velux skylights — you get the daylight without the heat loss, glare or rain noise.
Do glass roofs overheat in summer?
Yes — even self-cleaning, solar-control glass struggles when the sun is directly overhead in mid-summer. Most glass-roofed conservatories still need internal blinds and aggressive ventilation to stay usable. A solid roof reflects solar gain entirely and stays comfortable without any extra hardware.
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