Conservatory Glass Upgrade: High‑Performance Glass Replacement
Replace outdated roof or wall glass with modern high‑performance units. Can help reduce solar heat gain by up to 86%, blocks up to 99% of UV rays, and helps reduce condensation risk — all without changing your frames.
Quick Answer
A conservatory glass upgrade replaces your existing roof and/or wall glass with modern high‑performance sealed units. This is a glass‑only intervention — we do not repair frames, replace gutters or overhaul seals. It is designed for structures where the frame is sound but the glass is no longer performing. The result is improved temperature control, reduced glare, UV protection and lower condensation risk.
Standard glass vs New Generation Glass
Typical performance data for a conservatory roof (values are representative).
| Metric | Standard Double Glazing (4‑16‑4) | New Generation Glass (Upgraded) |
|---|---|---|
| Solar heat rejection | ~25–35% | Up to 86% |
| U‑value (insulation) | ~1.3–1.6 W/m²K | <1.0 W/m²K |
| UV block | ~50–60% | Up to 99% |
| Visible light transmission | ~78% | ~65% (reduces glare while remaining bright) |
| Condensation resistance | Moderate | Improved (warm‑edge spacer technology) |
| Potential temperature reduction (summer) | – | Can be 8–10°C cooler vs standard glass |
| Winter heat loss reduction | – | ~30% less heat loss typically reported |
*Values based on manufacturer data and centre‑pane measurements. Actual performance varies with frame type, orientation and installation.
The glass‑only replacement process
Inspection & quote
We assess your existing glass, frame condition and take measurements.
Glass manufacture
New Generation Glass units made to order (typically 7–10 days).
Old glass removal
Carefully remove existing roof or wall glass. No structural changes.
New glass installation
Fit new units with warm‑edge spacers and new perimeter gaskets.
Clean & finish
Full site clean and optional Clear Shield coating application.
Typical timeline: 1–2 days for roof glass, +1 day for wall glass. No scaffolding needed for most single‑storey structures.
Glass upgrade vs full refurbishment
✅ Glass‑only upgrade is right when…
- Frames are structurally sound (no rot, no major corrosion).
- No active leaks from gutters or flashings.
- Main issues: overheating, glare, UV fading, condensation.
- You want lower cost and minimal disruption.
- Typical cost guide: £2,000 – £5,000 depending on size.
- Typical time: 1–2 days.
🔄 Full refurbishment is better when…
- Seals are perished, gutters leak, or frames are deteriorating.
- You also need hardware replacement (handles, locks, hinges).
- Lead flashings or drainage need attention.
- You want a complete refresh including deep clean and protective coating.
- Typical cost guide: £5,000 – £12,000+ depending on scope.
- Typical time: 3–5 days.
Real‑world example (illustrative)
Scenario: A uPVC conservatory in the South East. Before upgrade – uncomfortably hot in summer, noticeable UV fading on furniture. After upgrading the roof glass to New Generation Glass:
- Peak summer temperatures became significantly more comfortable (owners reported being able to use the room on hot days for the first time).
- No further visible fading after 18 months.
- Condensation almost eliminated.
The customer paid around a fifth of a full replacement cost. (This example is based on typical customer feedback; individual results may vary.)
Start with a Health Check
Not sure if your frames are suitable? A Health Check inspects the structure and recommends glass upgrade, repairs or refurbishment.
Repairs & Maintenance
If you have minor issues (leaking seals, sticky doors) but glass is still acceptable – repairs may come first.
Refurbishment Upgrade
Need frame repairs, new gutters, lead work and glass upgrade? That is our full refurbishment service.
Glass upgrade – common questions
Typical roof‑only glass upgrade is in the range of £2,000 – £5,000 depending on size and glass specification. Wall glass addition adds approximately £1,500 – £3,000. We provide no‑obligation quotes after an on‑site or video assessment.
Yes. The roof glass has the biggest impact on overheating and heat loss. Many customers start with the roof and later upgrade side windows if needed.
No. New Generation Glass has a light transmission of ~65%, which reduces glare while still allowing plenty of natural light. It appears clear from inside, not tinted like sunglasses.
Roof glass replacement typically takes 1–2 days. If also replacing wall glass, allow an additional day. No scaffolding is normally required for single‑storey conservatories.
Yes. New Generation Glass uses warm‑edge spacer bars that reduce thermal bridging, lowering the risk of condensation on the glass surface. However, proper ventilation is still recommended.
Yes. All New Generation Glass units come with a manufacturer’s warranty (typically 10 years) and our workmanship guarantee on installation.
Yes, provided the frames are in good condition. New Generation Glass units are similar in weight to standard double glazing. We inspect frame condition before any work.
Then a glass‑only upgrade is not sufficient. You should look at our Refurbishment Upgrade which combines glass replacement with frame, gutter and seal work.
Upgrade your glass. Transform your comfort.
Get a no‑obligation quote for glass‑only roof or wall replacement.
Need advice? Book a Health Check – we’ll inspect your structure and recommend the right path.