Temperature-Controlled Conservatory Glass
New Generation Glass — Exclusive to Room Outside
For many homeowners, temperature is the main reason their conservatory goes unused. Too hot in summer, too cold in winter. New Generation Glass is designed to address both — helping to reflect heat in summer, retain warmth in winter, and keep the glass cleaner for longer. Exclusive to Room Outside since 1999.
Call us anytime on 01243 538999 – David our digital assistant will take a few details so the right specialist can follow up personally.
Energy-Efficient NGG Roof Glass Reflecting 86% of Solar Heat
Most conservatories and glass extensions share the same problem: they are too hot to use in summer and too cold in winter. Many homeowners across the UK have rooms they paid good money for and barely use for half the year. New Generation Glass was developed to help address that.
In 1999, we were the first company to exclusively introduce this groundbreaking solar-controlled glass to the UK. Since then, the technology has been refined and our New Generation Glass now leads the field with superior specification. It is designed to help reflect heat and light back to its source — helping to maintain a comfortable temperature in your glass room throughout every season, without expensive blinds, air conditioning or additional heating.
The result? A room you can actually use throughout the year. Homeowners regularly tell us that upgrading to New Generation Glass made a noticeable difference to how they use their conservatory — in many cases turning a space they had largely given up on into one of the most used rooms in the house.
Additionally, its self-cleaning technology helps ensure minimal maintenance, meeting the unique demands of a room built with a significant amount of glazing. This can help reduce the frequency of manual cleaning and the need for professional window cleaners.
We have been improving glass extensions and conservatories across England — including West Sussex, East Sussex, Surrey, Hampshire, Kent, Essex, Greater London, Berkshire and Dorset — for over 50 years, and fitting New Generation Glass since 1999.
Key Benefits
Standard Glass Fails the British Climate
Traditional conservatory glass lets the sun pour in unchecked in summer and haemorrhages warmth in winter. The result is a room that sits empty for months at a time — a wasted investment.
The Glass That Turns a Conservatory into a Room You Actually Use
Four problems solved with one upgrade — advanced solar control and thermal insulation designed for year-round comfort in the British climate.
Cool in Summer
Designed to help reflect up to 86% of the sun’s heat in summer, helping to keep interiors cool without the expense of air conditioning or the frustration of blinds that block your view. Your room stays usable even on the hottest days.
Warm in Winter
A U-value under 1.0 W/m²K helps retain warmth in winter, which can help reduce your heating bills and eliminate the cold spots that make traditional conservatories uncomfortable from October to April.
Protects What You Love
Blocks virtually all harmful UV rays, helping to protect your furniture, flooring and artwork from fading and sun damage. Many homeowners avoid putting anything valuable in a conservatory — with New Generation Glass, you do not have to compromise.
Cleans Itself
The optional polymeric treatment creates a non-stick surface — rain helps wash away dirt, which can significantly reduce the need for manual cleaning and the frequency of professional window cleaning visits.
Six Reasons This Glass Outperforms Everything Else
Every pane combines warm-edge spacing, Low-E coatings and argon gas filling — technology that standard glass simply cannot match.
Up to 86% Solar Reflection
A specially developed Low-E coating is designed to help reflect the sun’s heat back outwards in summer, helping to keep your room comfortable even on the hottest days.
U-Value Under 1.0
The combination of Low-E coating, argon gas fill and warm-edge spacer bar helps deliver a U-value under 1.0 W/m²K — providing exceptional thermal insulation.
Warm-Edge Technology
Our spacer bar is up to 950 times less conductive than aluminium, helping to increase internal edge temperatures and significantly enhance insulation around the perimeter.
Over 99% UV Blockage
Blocks virtually all harmful UV rays, helping to protect your family and soft furnishings from fading and damage over time — without reducing natural light.
Self-Cleaning Surface
A specialist polymeric resin treatment can be applied to the exterior. This creates a non-stick surface that helps stay cleaner for longer, with rain helping to wash away dirt.
Argon Gas Fill
The sealed cavity is filled with argon gas, which is denser than air and helps provide superior thermal insulation. This contributes to the exceptional U-value under 1.0 W/m²K.
How New Generation Glass Works
Three complementary technologies working together in every pane — this is not a coating you add afterwards, it is engineered into the glass from the start.
Warm-Edge Spacer
Our spacer bar is up to 950 times less conductive than aluminium, helping to increase internal edge temperatures and significantly enhance insulation. This can help reduce the condensation and cold spots that plague traditional conservatories — the drafty feeling around windows that makes the room uncomfortable.
Low-E Coating
A microscopically thin metal oxide coating is designed to help reflect heat back to its source. In winter, it can help keep warmth inside; in summer, it can help reflect solar heat away — all while letting natural light pass through. This balance of light and thermal control is one of the key advantages over standard glazing.
Argon Gas Fill
The sealed cavity is filled with argon gas, which is denser than air and helps provide superior thermal insulation. This contributes to the exceptional U-value of under 1.0 W/m²K — far better than standard double glazing and a significant factor in making the room comfortable year-round without excessive heating or cooling.
Heat Tunnel Test
This side-by-side comparison places standard conservatory glass and New Generation Glass under the same controlled heat source. The difference in heat transmission through each pane is visible and measurable.
We carry out this demonstration during home visits so homeowners can assess the difference firsthand. It is a useful way to understand why the glass specification has such a significant effect on the comfort of a conservatory or glass extension.
Left side of the tunnel (standard double glazing): heat passes through and is clearly felt on the other side. Right side (New Generation Glass): the surface remains noticeably cooler — showing how the Low-E coating and argon gas fill are designed to help reflect solar heat before it enters the room. The same technology works in reverse during winter, helping to retain warmth inside.
Temperature-Controlled Glass vs Standard Glazing
Most conservatories are fitted with standard double glazing. Here is how New Generation Glass compares on the measures that matter most.
| Feature | New Generation Glass | Standard Double Glazing |
|---|---|---|
| Solar heat rejection | Helps block up to 86% | Typically 20–30% |
| U-value | Under 1.0 W/m²K achievable | Typically 1.4–2.0 W/m²K |
| UV protection | Over 99% blocked | Limited — furnishings fade |
| Self-cleaning | Optional polymeric treatment | Not available |
| Condensation | Warm-edge spacer helps reduce | Common around edges |
| Year-round comfort | Designed for all seasons | Too hot in summer, cold in winter |
New Generation Glass is available as an upgrade on all Room Outside extensions, Orangeries and conservatories. Book a free consultation →
Solar Control Glass vs Blinds, Films and Air Con
Homeowners often try blinds, films or air conditioning before discovering the glass itself is the problem. Here is how the alternatives compare.
| Feature | New Generation Glass | Blinds, Films & Air Con |
|---|---|---|
| Heat control | Reflects heat at source — before it enters | Blocks light or cools air after heat enters |
| Natural light | Full light passes through | Blinds and films reduce natural light |
| Winter warmth | U-value under 1.0 helps retain heat | No insulation benefit |
| Maintenance | Self-cleaning option — minimal upkeep | Blinds collect dust; AC needs servicing |
| Running costs | No energy required | Air con adds to electricity bills |
| Longevity | 25+ year track record | Films peel; blinds wear; AC units age |
New Generation Glass is designed to address the problem at source rather than treating the symptoms. Speak to a designer →
Many homeowners tell us they wish they had done it years earlier.
If your conservatory goes unused for months because of temperature, New Generation Glass is one of the most effective upgrades available. Whether you are planning a new Glass Extension, Orangery or conservatory — or upgrading an existing one — speak to a designer today about whether it is right for your project.
Call us anytime – David our digital assistant will take a few details so the right specialist can follow up personally.
Homeowners Who Made the Switch
Real homeowners sharing their experience of New Generation Glass — unedited and in their own words. The most common thing we hear: “We wish we had done it sooner.”
“Great work thanks to all the team. Love the New Generation Glass works fantastic in the sun. Would definitely recommend.”
“Very happy with the work Matt did for us with our glass conservatory. Matt and Matthew were very professional and always tidied up the place at the end of each day before leaving. They arrived on time every day and checked everything with us and listened to our feedback. We are happy with our new glass roof and warm weather this week will hopefully demonstrate that the new generation glass protects us from the heat. We would recommend Matt and Room Outside. Many thanks.”
“We have had a great experience with Room Outside for the delivery of a glass roofed orangery. Richard Bennet was extremely patient during our initial flip-flopping on design. He suggested a number of tweaks that demonstrated his considerable experience, together with a next-gen glass solution that he thought would deliver the right, quality outcome. Despite the complexity, the resulting structure was millimetre perfect. The outcome is spectacular — a high quality, contemporary wooden building that perfectly complements the 18C surroundings — and I can highly recommend the solar glass that Richard suggested — the room remains cool despite the recent blistering conditions!”
Temperature-Controlled Glass FAQs
Common questions about our solar control conservatory glass technology.
New Generation Glass uses a specially developed Low-E coating and argon gas filling designed to help reflect heat back to its source. It can reflect up to 86% of the sun’s rays in summer to help prevent overheating, and helps retain interior warmth in winter with a U-value under 1.0 W/m²K.
Yes. A specialist polymeric resin treatment can be applied to the exterior surfaces. This creates a non-stick, low-maintenance surface that helps stay cleaner for longer and helps resist staining. Rain helps sheet off, carrying dirt with it.
Yes. It blocks virtually all harmful UV rays (over 99%), helping to protect both your family and soft furnishings from fading and damage over time.
Depending on the specific configuration selected by our designers, the U-value can be under 1.0 W/m²K, providing exceptional thermal insulation — far better than standard glazing.
Yes. New Generation Glass is available as an upgrade on all Room Outside Glass Extensions, Orangeries and conservatories. Speak to a designer about incorporating it into your project.
Depending on product and location, we offer a 10-year structural guarantee backed by independent UK insurers, alongside separate product-specific warranties. The exact terms are confirmed in your quotation.
Make Better Use of the Room You Already Have
Many conservatories across the UK go underused because of temperature — too hot in summer, too cold in winter. New Generation Glass is designed to help address both, making the space more comfortable throughout the year.
Whether you are building new or upgrading an existing conservatory, Orangery or Glass Extension, a conversation with our designers is a good place to start.
Prefer to talk? Call us on 01243 538999 — David our digital assistant will take a few details so the right specialist can follow up personally.