Description
Description
Double Glaze Rooflight
Discover the elegance and functionality of our flat glass rooflights, the top choice in today’s roofing market. Designed for seamless integration and exceptional performance, our rooflights are available in a wide range of standard sizes for fast, hassle free online ordering.
Customise your glass specifications to suit your needs, and we’ll deliver in just 3 weeks!
Rooflight Feature and Specifications
Lid Only Rooflight
Lid only units are designed to be fixed onto a builder’s upstand on flat or pitched roofs.
Efficient
Each unit is manufactured from powder-coated aluminium with an integrated thermal break for enhanced insulation and reduced heat loss.
Double Glazed Rooflights Specification
Our cost-effective double glazed rooflights combine toughened safety glass with a low-E coating for excellent thermal performance. The typical build includes:
- Outer Pane: 6 mm clear heat-soak tested toughened glass, reducing the risk of spontaneous breakage by 95% compared to standard glass.
- Cavity: 20 mm argon-filled cavity for enhanced insulation.
- Inner Pane:
- Option 1: 6 mm soft coat low-E heat-soak tested toughened glass.
- Option 2: 8.8 mm soft coat laminated glass for added overhead protection.
Note: While toughened glass is classified as safety glass, it may fragment in the rare event of breakage. For enhanced safety, opt for the laminated double glazed upgrade, which prevents glass fragments from falling through, ideal for overhead installations.
Pre-Determined Glass Load and Rooflight Load Design
Our rooflights are rigorously tested to withstand typical UK environmental conditions, ensuring reliability and performance. Key load ratings include:
- Standard Rooflights:
- Wind Load: 1.0 kN/m², designed to resist strong winds across the UK.
- Snow Load: 0.9 kN/m², capable of supporting moderate to heavy snow accumulation.
- Walk-On Rooflights:
- Uniform Distributed Load (UDL): 1.5 kN/m², ideal for areas with foot traffic or maintenance access.
- Concentrated Load: 2.0 kN, ensuring structural integrity under localized pressure.
For projects requiring higher or site-specific load performance, we offer custom-designed rooflights tailored to your structural needs. Contact us to discuss bespoke solutions for unique wind, snow, or load requirements.
Guide to Flat Rooflight Sizes
Choosing the right size for your flat rooflight or skylight window is crucial for maximising natural light, ensuring energy efficiency, and meeting structural requirements.
Our premium flat roof lights, designed for both flat and pitched roofs with an upstand, offer versatile sizing options to suit diverse residential and commercial projects.
How to measure your roof light
Flat rooflights and skylights are available in a range of standard sizes to fit most projects, with dimensions typically measured by the External Upstand.
Rooflight Drawing (Lid Only)
- 1000×1000 mm
- 1200×1000 mm
- 1500×1000 mm
- 1800×1000 mm
- 2000×1000 mm
- 2200×1000 mm
- 2500×1000 mm
- 3000×1000 mm
Need a custom size, oversized large rooflights or bespoke shapes ?
Order Online
We’ve made our popular flat glass rooflight sizes available online for quick ordering, with optional extras delivered in just 3 weeks
1000 x 1000mm
1000 x 1500mm
1000 x 2000mm
1000 x 3000mm
Why Overhead Glazing Rooflights?
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Premium Components: Crafted with argon-filled glass, warm-edge spacers, and Dow silicone-sealed units for superior energy efficiency.
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Enhanced Overhead Protection: Features high-performance laminated panes, surpassing standard 8.8mm annealed laminated glass for exceptional safety.
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Heat-Soaked Toughened Glass: Reduces spontaneous glass breakage due to NiS by 95% for lasting reliability.
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Built for UK Weather: Designed to withstand wind loads of 1.0 kN/m² and snow loads of 0.9 kN/m², with custom load designs available for unique regional needs.
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Long-Lasting Assurance: Backed by a 10-year seal warranty for complete peace of mind.
- Bespoke Option: Large rooflights available up to 7sqm in one piece!
Frequently asked questions
How long does it take for my rooflight to be delivered?
All our rooflights are bespoke and made to order. Standard sizes can take up to 3 weeks to manufacture.
Where is delivery available?
Delivery is available nation wide
What is the warranty?
We offer 10 years seal warranty on all our rooflights.
Do you offer installation?
We offer installation services across the UK. Please get in touch to find out more about our fees.

Versatile Wall Abutted Designs
Our wall-abutted rooflights can be abutted on up to three sides, using the same high quality materials for clean lines, thermal efficiency and enhanced natural light. Perfect for flat or pitched roof extensions with an upstand.
Check out our wall abutted Rooflights
Get In Touch
Testimonials
“Excellent professional service from Nader over 12 months of our project design planning and installation. We are delighted with the end result, and seamless design of our roof glazing. Great Job…👍🏼”
Edward BandyBespoke Modular Rooflight
“We were fortunate to find Overhead Glazing online and what attracted us was the modern and sleek design of the ridge lights. We are so happy with the finished product and it looks great on our barn conversion, complementing the old with the new.”
Ross HowesRidge Rooflight
“Very nice team and great rooflights. Really helpful and made the whole process easy. Highly recommended. Thank you. Paddy”
Paddy SuttonRooflight Replacement
Flat Rooflights - Made to order

Custom Sizing for Unique Projects
For non-standard roofs or bespoke designs, custom rooflights are available to meet specific architectural needs:
- Bespoke Dimensions: Our flat rooflights can be tailored up to 7m² in a single pane or designed as modular setups, ensuring flexibility for unique spaces like repurposed buildings or large extensions.
- Specialty Shapes: Beyond standard rectangular or square units, circular rooflights (up to 2400mm diameter) or multi-sectional designs with supporting beams are available for distinctive aesthetics
- Replacement Skylights: Custom sizes are ideal for replacing older skylights in listed buildings or non-standard structures, ensuring compliance with modern insulation standards.
Request a Custom Quote to find the perfect glazing solution.

Fixed Standard Rooflights
For those who seek quality rooflights at great prices. Lid only Fixed Rooflight available in double glazed and laminated glass.

Walk-on Rooflights
These work as a stunning feature providing access to rooftop areas, blurring the boundaries between interior and exterior spaces.
Modular Rooflights
Custom specified and flexible solution overcomes the practical challenges of transporting and installing large, single-piece rooflights.

Eaves Rooflights
The ideal solution for assembling a rooflight around internal or external angles in adjacent walls or chimney stacks.

Circular Rooflights
These are specially designed Rooflights that are made circular. It provides facility in design and aesthetics. The sweeping curves are used to create a modern look.

Ridge Rooflights
The Ridge Rooflight is a custom rooflight, glazed on both returns and precision built to straddle the ridge of your roof, matching its angle of pitch precisely.