- 16 Oct 2025|
- News
In Summary
- Modern roof lanterns achieve impressive energy efficiency, with their low u-Values and ability to reduce heat loss leading to considerable energy savings.
- Advanced features like thermal break technology, high-performance double glazing and uPVC frames deliver excellent thermal performance whilst maintaining aesthetic appeal
- Energy efficient roof lanterns provide long-term cost savings, comfortable indoor temperatures and reduced carbon footprint for environmentally conscious homeowners
- Beyond energy efficiency, roof lanterns offer transformative natural light, versatile customisation options and low maintenance requirements for various roof types
- Doncaster Trade Windows manufactures premium roof lantern systems with exceptional thermal performance, comprehensive size options and expert installation services across South Yorkshire
The benefits of installing a roof lantern are clear for all to see.
Not only do they add a stunning architectural feature to your property, but roof lanterns also guide natural light into your interior from all angles. This is a perk that’s proven to come with several mental and physical health benefits, including added productivity and improved sleep quality.
However, some homeowners worry that this comes at a cost when it comes to thermal efficiency – a statement that is no longer true thanks to modern technology.
Nowadays, roof lanterns are far more energy efficient than you might think, successfully combining beautiful aesthetics with impressive thermal performance, which we’ll explore in detail throughout this blog.
What is a roof lantern?
Before we delve into the specifics, here’s a quick definition on the product.
A roof lantern is a glazed structure that sits on your roof, designed to flood interior spaces with natural light. Unlike traditional roof lights, lantern roofs feature raised glass panels that create a stunning architectural focal point whilst maximising light transmission into your home, regardless of where the sun is.
Perfect for kitchen extensions, orangeries and all kinds of flat roofs, these modern designs combine clean frame lines with advanced technology to create bright, inviting spaces that feel larger and more connected to the outdoors.
Are roof lanterns energy efficient?
Absolutely. Modern roof lanterns achieve impressive energy efficiency through sophisticated engineering and high-quality materials. Today’s designs bear little resemblance to older glazed structures that were notorious for heat loss.
Exceptional U-values deliver real energy savings
The key to roof lantern energy efficiency lies in their U-values – a measure of heat transfer through materials.
Modern roof lanterns can achieve U-values as low as 1.0 W/m²K, which is excellent for glazed structures. Lower U-values mean less energy escapes, keeping your home warmer in colder months and reducing energy consumption.
This reduced energy transfer also means that in the summer, less unwelcome heat enters through your glazing.
Thermal break technology prevents heat loss
Advanced thermal breaks are game-changers for energy efficient roof lanterns.
These components interrupt the escape path that heat would normally take through frames, preventing cold bridging.
By stopping heat transfer at crucial connection points, thermal break technology significantly improves overall thermal performance, a perk that’s incorporated with Doncaster Trade Windows’ roof lanterns.
Modern double glazing maximises thermal efficiency
Today’s roof lanterns feature high-performance double glazing with low-E coatings and argon gas fills between panes of glass.
This combination creates an insulating barrier that maintains comfortable indoor temperatures year-round whilst controlling solar gain during summer months.
uPVC frames offer superior insulation
Unlike traditional aluminium roof lanterns, uPVC frames provide excellent thermal efficiency at a more affordable price point.
These frames naturally insulate better than metal alternatives, contributing to lower energy bills and reduced carbon footprint without compromising on durability or aesthetic appeal.
Benefits of thermally efficient roof lanterns
Installing an energy efficient roof lantern creates multiple benefits beyond just beautiful natural light.
Significant cost savings over time
Efficient roof lanterns reduce heating costs by minimising heat loss whilst maximising free solar heating during daylight hours.
According to recent industry data from GGF, high-performance glazing can reduce heat loss by up to 50%, as you’ll be much less dependant on costly appliances like radiators in the winter, and fans/air conditioning in the summer.
Year-round comfort in your living space
Thermal efficiency means stable indoor temperatures regardless of external weather.
Your extension remains cosy during winter whilst staying pleasantly cool in summer, creating comfortable living conditions that you’ll enjoy throughout the seasons, regardless of whether you’re using the space below as a home office, kitchen, gym, etc.
Environmental sustainability
Lower energy consumption directly reduces your carbon footprint.
By choosing an energy efficient roof lantern, you’re making environmentally responsible home improvements that contribute to a greener future whilst enjoying long-term energy savings.
Other benefits of roof lanterns
Beyond energy efficiency, roof lanterns offer numerous advantages that make them an excellent choice for modern home improvements.
Transformative natural light intake
Roof lanterns flood previously dark spaces with daylight, creating bright, welcoming environments.
The vertical glass panels capture light from multiple angles throughout the day, dramatically improving the ambience of your kitchen island area, dining space or living room.
Impressive customisation options
Different types of roof lanterns suit various architectural styles and project requirements.
From compact square designs to larger rectangular configurations, you can tailor dimensions and frame colours including contemporary Anthracite Grey, Matt Black, Moondust Grey, classic White and traditional Golden Oak finishes.
Versatility across different roof types
Modern roof lanterns work beautifully on flat roofs, pitched roofs and various extension types. Whether you’re adding to an existing orangery or creating a new kitchen extension, these adaptable structures integrate seamlessly with your existing architecture.
Low maintenance requirements
Quality roof lanterns require minimal upkeep.
The robust uPVC materials resist weathering whilst self-cleaning glass options reduce maintenance time.
Combined with excellent structural integrity, this makes roof lanterns a practical long-term investment.
Roof lanterns from Doncaster Trade Windows
At Doncaster Trade Windows, we manufacture premium lantern roof systems that combine exceptional thermal performance with stunning visual appeal.
Our roof lanterns achieve U-values as low as 1.0 W/m²K through thermally broken aluminium ridge and ring beam components, preventing cold bridging whilst maintaining structural strength.
We use high-performance double glazing with low-E coatings and argon gas fills to minimise heat loss during winter whilst controlling solar gain in summer. Our uPVC frame construction offers superior thermal efficiency compared to aluminium frames, providing cost-effective solutions without compromising quality or aesthetics.
Available in versatile size options from compact designs to larger 2-bar and 3-bar configurations, our roof lanterns suit any project. Choose from contemporary frame colours or classic finishes, all featuring matching or contrasting interior options to complement your property style.
Who are Doncaster Trade Windows?
Since 2013, we’ve been transforming homes across South Yorkshire with premium window, door and conservatory solutions. Our family-owned business operates from a specialist manufacturing facility in Doncaster, where we craft high-quality uPVC products using Eurocell profiles whilst sourcing aluminium systems from industry-leading suppliers.
Our expert team serves homeowners throughout a 20-mile radius of Doncaster, providing everything from energy-efficient windows and French doors to innovative roof systems and bifold doors. We’re proud members of Certass Trade Association with Competent Person certification for domestic glazing.
Visit our local showroom to explore our collections in person, or contact our friendly team on 01302 891426 for expert advice and free quotes.
Frequently asked questions
Do roof lanterns increase energy bills?
Modern energy efficient roof lanterns actually reduce energy consumption through superior insulation and thermal performance, potentially lowering heating costs.
What U-value should I look for?
Look for roof lanterns achieving U-values of 1.0 W/m²K or lower for excellent thermal efficiency and energy savings.
Are uPVC roof lanterns better than aluminium?
uPVC frames offer superior thermal efficiency at lower cost, making them an excellent choice for energy-conscious homeowners.
How much natural light do roof lanterns provide?
Roof lanterns dramatically increase natural light intake, with vertical glass panels capturing daylight from multiple angles throughout the day.
Do roof lanterns work on flat roofs?
Yes, modern roof lanterns are specifically designed for flat roofs and various extension types, providing versatile solutions.
Ready to transform your extension with an energy efficient roof lantern? Contact Doncaster Trade Windows today on 01302 891426 or email doncastertradewindows@live.co.uk for your free quote and expert advice on creating bright, energy-efficient living spaces.
