Glass roof or hybrid conservatory roof?

A hybrid roof is a solid, insulated roof with glass panels set into it. Compared with a glass roof, you are trading most of the light for most of the comfort. That is a good trade for a conservatory that overheats every summer and sits unused every winter. It is a poor one if you mainly use the room on bright spring and autumn days and love looking up at the sky.

The two also differ on price and paperwork. A glass roof is cheaper and usually exempt from building regulations. A hybrid costs more and needs approval, like any mostly solid roof.

Glass vs hybrid roof at a glance

	Glass roof	Hybrid roof
Price, medium conservatory (about 4m x 3.5m), fitted	£3,500 to £7,000 (typically about £5,200)	£6,600 to £12,600 (typically about £9,500)
Heat lost (U-value, W/m²K)	1.0 to 1.2 for performance glass	0.15 to 0.18 on the solid areas; about 0.25 to 0.4 across the whole roof (our estimate)
Sun’s heat let in through the roof	18% to 70%, depending on glass grade and tint	About 3% to 10% (our estimate)
Time on site	2 to 4 days	4 to 7 days
Building regulations	Usually exempt when like for like	Approval needed
Lifespan	25 years plus	25 years plus
Daylight through the roof	The most of any roof	Good, in pools under the glazed panels
Rain noise	Moderate: quieter than polycarbonate, louder than tiled	Quiet; glazed panels add a little

Prices are our site-wide ranges for a medium conservatory (about 4m x 3.5m) across lean-to, Edwardian, Victorian and gable shapes, fitted; installers usually quote including VAT, but check. Glass figures are Ultraframe’s published data for its performance glass. The hybrid whole-roof figures are our estimate for a roof that is about 85% solid and 15% glazed; the more glass you choose, the closer a hybrid gets to a glass roof.

Which is warmer in winter?

The hybrid, by a wide margin. Performance glass is rated at 1.0 to 1.2 W/m²K. The solid sections of a hybrid reach 0.15 to 0.18, and even allowing for its glazed panels we estimate the whole roof at around 0.25 to 0.4. That means a hybrid loses a fraction of the heat a glass roof does through the roof. The walls, windows and floor are the same in both cases, so neither will make an old conservatory as warm as the house on its own, but the hybrid removes the biggest cold surface.

Which stays cooler in summer?

The hybrid. Which? warns that the more glass there is in the roof, the greater the chance of overheating, and 24% of Which? members surveyed in April 2026 said their conservatory’s temperature is difficult to regulate. Glass has improved: Ultraframe’s range lets through anywhere from 70% of the sun’s heat for its clearest standard grade to 18% for its best tinted grade. Our estimate for a typical hybrid is about 3% to 10% across the whole roof, because most of it lets in no sun at all. For a south or west facing room that overheats, that is the difference that matters most. See our page on a conservatory that is too hot.

How much light do you give up with a hybrid?

Quite a lot compared with glass, but far less than with a fully solid roof. A glass roof brings light in across the whole ceiling. A hybrid brings it in through the panels you choose, so you get pools of daylight and some sky rather than an open glass ceiling. Ultraframe says glass can replace any of the solid panels on its LivinRoof, and SupaLite’s SkyVista adds one or two glass panels that let through up to 47% of the light. Put glazing where it helps most, such as over the doors into the house. If brightness is everything, stick with glass and choose the right grade: our guide to solar control glass explains the options.

Which is quieter in the rain?

The hybrid. Most of its surface is solid and insulated, which is the quietest kind of roof. Glass is quieter than polycarbonate but louder than a solid roof, according to ExpertSure. No independent decibel tests were found for either.

Cost and value for money

On our figures a hybrid typically costs about £9,500 for a medium conservatory and a glass roof about £5,200, so the hybrid costs roughly £4,300 more. It also takes longer to fit because the ceiling is boarded and plastered, and there are building control fees on top. Branded hybrids run higher than our generic range: ExpertSure puts a fitted LivinRoof at roughly £9,500 to £15,500 depending on size and shape. See hybrid roof costs and glass roof costs.

What you get for the extra is a room you can use more months of the year. Do not expect the bills to repay the difference: independent evidence of savings from a roof replacement was not found, and manufacturer figures assume the conservatory is heated. Glass has lower upfront cost but some running costs of its own: a misted sealed unit cannot be repaired and has to be replaced, and 10% of Which? members said their glass was hard to keep clean.

Building regulations and paperwork

A glass roof replacing a glazed or polycarbonate roof is usually exempt, as long as the conservatory still meets the exemption afterwards: ground level, no more than 30m², safety glazing where needed, separated from the house by external doors or windows, and not heated by the house’s central heating.

A hybrid is treated as a solid roof. LABC says that replacing a translucent roof with a solid one needs a building regulations application, and in England the exemption only survives if a significant proportion of the roof is still glazed, which a mostly solid roof is very unlikely to meet. Scotland and Northern Ireland use fixed percentages (at least 75% of the roof translucent), so a hybrid clearly needs approval there. Building control checks the frames, foundations and insulation, and you receive a completion certificate at the end. Our building regulations guide covers the process.

Energy assessments treat them differently too. A new glass roof keeps the conservatory a conservatory. Since 6 August 2026, a conservatory whose replaced roof is less than 75% glazed is recorded as an extension, so keep the hybrid roof’s specification to show the insulation.

Looks and resale

A glass roof keeps the classic conservatory look, inside and out. A hybrid looks more like a modern extension: a plastered, often vaulted ceiling with glass panels set into it. Some hybrids have tiles outside; LivinRoof uses grey external panels, which suit some houses better than others.

No independent data shows what either roof adds to a sale price. Paperwork is simpler with glass on an exempt conservatory. With a hybrid, buyers’ solicitors will ask for the completion certificate, so keep it safe.

Glass or hybrid: which should you choose?

• The conservatory faces north or east and you use it mainly by day: glass, with a clear, low emissivity grade.
• It faces south or west and is unusable on summer afternoons: hybrid.
• You want to use it as a year-round dining room, office or playroom: hybrid.
• Your budget is under about £6,500: glass, or insulated panels if you can do without roof light.
• Your frames lack steel reinforcement: glass, unless you are ready to pay for structural work, since a hybrid needs the same checks as a tiled roof.
• You want the most light with less heat than your current roof: glass with high solar rejection, plus vents.

When you get quotes, ask glass installers for the U-value and solar figure of the exact glass offered, and ask hybrid installers how much of the roof will be glazed and what the whole-roof U-value is. Our guide to comparing quotes has a full checklist.