- 16 Oct 2025|
- News
Are you planning a home extension in Doncaster but worried it might feel a little dark? Or perhaps you want to add a stunning glass feature to your flat roof, but you’re concerned about losing heat during the chilly Yorkshire winters?
In the past, adding large amounts of glass to a home meant sacrificing warmth. Today, thanks to modern engineering, you don’t have to choose between natural light and a cozy home. Enter the energy-efficient roof lantern.
Here is everything you need to know about transforming your living space with a beautiful, thermally efficient roof lantern.
What is a Roof Lantern?
Simply put, a roof lantern is a pitched architectural skylight that sits on a flat roof. Unlike a standard flat skylight, roof lanterns are built with multiple glass panels arranged in a pyramid or pitched shape. They are designed to channel a massive amount of natural light into the room below from all angles, creating a bright, open, and airy feel.
The Big Question: Are Roof Lanterns Energy Efficient?
Yes! Modern roof lanterns are highly energy-efficient. You no longer have to worry about the “greenhouse effect” (too hot in summer, too cold in winter). Today’s designs use cutting-edge technology to keep your room’s temperature just right:
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Thermally Broken Frames: Older metal frames used to let heat escape. Modern roof lanterns use a “thermal break”—a non-conductive material placed inside the frame that stops cold air from traveling in and warm air from traveling out.
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Advanced Double & Triple Glazing: Standard roof lanterns now come with high-performance double or triple glazing.
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Argon Gas Fills: The space between the glass panes is often filled with Argon gas, which slows down heat transfer much better than regular air.
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Low-E (Low-Emissivity) Glass: This special microscopic coating is a game-changer. It reflects your home’s central heating back into the room during the winter, while bouncing the sun’s harsh UV rays away during the summer.
The Top Benefits of Adding a Roof Lantern to Your Home
1. Lower Energy Bills
Because they let in so much sunlight, you won’t need to turn your lights on as early in the day. Plus, thanks to the advanced glazing keeping the heat locked inside, your boiler won’t have to work as hard to keep your extension warm.
2. Year-Round Comfort
Whether you are using your new space as a dining room, kitchen, or home office, the thermal efficiency ensures the room is comfortable 365 days a year—never freezing in December or boiling in July.
3. A Stunning Architectural Feature
Roof lanterns instantly add a “wow factor” to any property. They elevate the look of a standard flat roof extension, adding height and volume to the ceiling that makes the entire room feel larger and more luxurious.
4. Increases Property Value
A well-lit, energy-efficient, and beautifully designed home extension is highly attractive to potential buyers, often adding real value to your property.
Why Choose Korniche Roof Lanterns in Doncaster?
At Doncaster Trade Windows (DTW), we proudly supply and install Korniche roof lanterns. Korniche is an award-winning brand known for blending incredible strength with elegant design.
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Slimline Profiles: Korniche lanterns feature some of the slimmest frames on the market. Less frame means more glass, and more glass means more light.
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Unbeatable Strength: Despite their slim appearance, they are engineered to be incredibly strong and weather-resistant.
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Exceptional Thermal Efficiency: They are built from the ground up to eliminate cold bridging, keeping your Doncaster home warm and your energy bills low.
Frequently Asked Questions (FAQs)
Do I need planning permission for a roof lantern?
In most cases, no. Roof lanterns usually fall under “Permitted Development” rights, provided they don’t extend higher than 150mm above the existing roof plane and aren’t higher than the highest part of your house’s roof. However, we always recommend checking with your local authority or asking our team for guidance.
Are roof lanterns hard to clean?
Not at all! We offer self-cleaning glass options. This glass has a special coating that breaks down organic dirt using sunlight, which is then simply washed away the next time it rains.
Can I get a custom size?
Yes, our roof lanterns are made to measure, ensuring a perfect fit for your specific flat roof extension.
Ready to Transform Your Home?
If you are ready to flood your home with natural light while keeping your energy bills in check, the team at Doncaster Trade Windows (DTW) is here to help. As a trusted local manufacturer and installer, we provide expert advice and high-quality installations tailored to your needs.