Flat Roof Skylight 1000 x 2500 mm, Fixed, Frameless, Triple Glazed, 123.60kgg, UV 0.9
Flat Roof Skylight 1000 x 2500 mm, Fixed, Frameless, Triple Glazed, 123.60kgg, UV 0.9 Original price was: £ 1.209.00.Current price is: £ 900.00. incl. VAT
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Flat Roof Skylight 1200 x 1200 mm, Fixed, Frameless, Triple Glazed,72.60kg, UV 0.9
Flat Roof Skylight 1200 x 1200 mm, Fixed, Frameless, Triple Glazed,72.60kg, UV 0.9 Original price was: £ 676.00.Current price is: £ 473.00. incl. VAT

Flat Roof Skylight 1000 x 3000 mm, Fixed, Frameless, Triple Glazed, 181.80kg, UV 0.9

(16 customer reviews)

Original price was: £ 1.759.00.Current price is: £ 1.290.00. incl. VAT

14 in stock (can be backordered)

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Regal Glass Group: A trusted manufacturer of premium roof windows
Built to prevent leaks—trusted rooflights by Regal Glass Group.

Type: Fixed Frameless Flat Roof Skylight
Internal Size: 1000 x 3000 mm
External Size: 1200 x 3200 mm
Glazing Type: Triple Glazed
Net Weight: 181.80kg
U Value: 0.9 W/m²K
G Value: 58%
Light transmittance : τv [%] 72
Sound reduction (EN 12758): 39dB
UV transmission : τuv [%] 0
Leakproof Design

Experience the excellence of Regal Glass Group’s roof windows, featuring these impressive technical characteristics.

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14 in stock (can be backordered)

Inclined Insulated Upstand for Flat Roof Skylight 1000 x 3000 mm
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Original price was: £ 430.00.Current price is: £ 372.00. incl. VAT
Skylight Blinds for Flat Roof Window 1000x3000mm - Translucent, Hardwired
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Original price was: £ 846.30.Current price is: £ 811.81. incl. VAT
Installation kit for 1 x Flat Roof Skylight 1000x3000mm
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£ 108.00
Foam Rope - Structural Glazing Tape – 9mm Thick (7.5m Rolls)
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£ 24.00 incl. VAT
Weatherproofing Sealant (Silicon) - DOWSIL™ 791, 310ml
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£ 15.00 incl. VAT
Self-Cleaning Liquid Smart Glass Bottle 15ml
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£ 30.00 incl. VAT

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Original price was: £ 1.759.00.Current price is: £ 1.096.50. incl. VAT
£ 108.00
Original price was: £ 430.00.Current price is: £ 316.20. incl. VAT
Original price was: £ 2.297.00.Current price is: £ 1.504.50. incl. VAT
For 3 items
Description

Our Flat Roof Skylights are composed of three distinct glass panes, each contributing to the unit’s durability and thermal efficiency:

  • Top Pane: 8 mm Planibel Clearlite / Thermally toughened glass BS EN 12150
  • Middle Pane: 6 mm Planibel Clearlite / Thermally toughened glass BS EN 12150
  • Bottom Pane: 6 mm iplus Thermally toughened glass with Low-E coating EN 12150

Premium Flat Roof Skylights

Thinking about adding a flat roof modern skylight but worried about heat loss? Our Flat Roof Skylight 1000 x 3000 mm provides an outstanding U-value of 0.9 W/m²K, thanks to its triple-glazed units and warm edge spacer technology. This ensures excellent insulation, keeping your space warm in winter and cool in summer – all while allowing in an abundance of natural light!

Why Choose Our Frameless Flat Roof Windows

  • Energy Efficiency: Benefit from excellent thermal performance with our triple-glazed units and warm edge spacer technology. This combination results in a U-value of 0.9 W/m²K, ensuring comfort throughout the year and reducing energy costs.
  • Unobstructed Views: The frameless design maximizes natural light penetration, offering stunning panoramic views of the sky.
  • Self-Cleaning Convenience: Enjoy low-maintenance living with a sunlight-activated self-cleaning feature that keeps your glass spotless.
  • Versatile Installation: Suitable for flat roofs with pitches ranging from 6° to 45°, making it adaptable for various home styles.
  • Peaceful Ambiance: Provides effective soundproofing for a quieter indoor environment.
  • Sun Safety: Protects against harmful UV rays.
  • Safety First: Made with safety-toughened glass for your peace of mind.
  • Regulation Compliant: Meets all British Standards & Building Regulations and carries the CE safety marking.

Essential Skylight Accessories

Enhance your flat roof skylight experience with these must-have accessories for seamless flat roof with skylights installation and optimal performance:

  • Skylight Blinds for Flat Roof Window 1000x3000mm: Control light and privacy in your space! These blinds are designed specifically for your skylight size, offering a perfect fit and allowing you to create the ideal atmosphere in your home.
  • Installation Kit for 1 x Flat Roof Skylight 1000x3000mm: Everything you need for a secure and hassle-free installation. This complete kit takes the guesswork out of the process, ensuring your skylight is properly installed for optimal performance and lasting enjoyment.
  • Foam Rope – Structural Glazing Tape – 9mm Thick (7.5m Rolls): Dual-purpose during installation. This high-quality tape provides effective sealing to keep the elements out and crucial support for a secure fit.
  • Weatherproofing Sealant (Silicon) – DOWSIL™ 791, 310ml: Essential for a watertight seal around your skylight. This durable sealant creates a weatherproof finish that keeps the elements out, ensuring your peace of mind and a comfortable indoor environment.
  • Self-Cleaning Liquid Smart Glass Bottle 15ml: This special solution restores the self-cleaning properties of your skylight, ensuring effortless maintenance and sparkling glass with minimal effort on your part.

Choose Regal Glass Skylight Windows

We offer an extensive range of standard sizes, including the popular 3000 x 1000 mm skylight (also known as 3 x 1 m roof light), as well as fully  custom skylights tailored to your specific needs. No matter the project, our flat skylights for flat roofs provide exceptional thermal performance with innovative features like triple glazing, ensuring your space remains comfortable year-round. They also flood your space with beautiful natural light, creating a brighter and more inviting atmosphere. Enhance any setting with the sleek, modern design of our flat rooflights.

Download our full product catalogue to explore our extensive Flat Roof skylight range and find the perfect solution for your project.

Ready to discuss your skylight needs? Contact us today!

🗺️ Where to Buy 1000 x 3000 mm Roof Lights Near Me

Need a 1000 x 3000 mm roof light near you? Also referred to as a 1 x 3 m large skylight, this expansive glazing format is perfect for high-spec garden rooms, grand hallways, or designer lofts. Regal Glass Group provides frameless rooflights with structural integrity and clean, uninterrupted daylight flow.

Frameless Design – Seamless Glass-to-Sky View
Saves Up to 10% on Energy Bills
Rated 5 Stars on Google
UKCA Certified – Building Regs Compliant
Fast UK Delivery from Our Own Factory

Whether you’re creating a contemporary extension or a luxury new build, our skylights deliver the light, clarity, and impact your project deserves.

Additional information
Weight 147.60 kg
Dimensions 325 × 10 × 125 cm
Brand

Regal Glass

Manufacturer

Internal Size

1000 x 3000 mm

External Size

1200 x 3200 mm

Glazing Type

Glass Tint

Self-Cleaning:

Yes

Roof Type

Flat Roof

,

Pitched Roof

Skylight Type

Frameless

Top Glass Pane:

8 mm Planibel Clearlite / Thermally toughened glass EN 12150

Air Gap

16 mm Argon 90%

Middle Glass Pane:

6 mm Planibel Clearlite / Thermally toughened glass EN 12150

Air Gap

16 mm Argon 90%

Bottom Glass Pane:

6 mm iplus 1.1 pos.5 Thermally toughened glass with Low-E coating EN 12150

Spacer Type

15mm Black Warm Edge

U value

0.9 [W/(m².K)]

Sound reduction - EN 12758

[dB] 39 (-2;-7)

Light transmittance: tv [%]

72

External light refection : ρv [%]

17

Internal light refection : ρvi [%]

17

Colour rendering index : Ra [%]

97

Solar energy transmittance : g [%]

57

Shading coefcient : SC

0.66

Selectivity

1.26

UV transmission : τuv [%]

0

Shipping & Delivery

Delivery Times:

  • Standard Size Flat & Pitched Skylights: Typically delivered within 3 to 6 working days.
  • Custom Size Orders: Production and delivery to the UK take approximately 3 to 6 weeks. Delivery is free of charge.
  • Roof Lanterns: Delivered within 10-14 working days from the date of order.
  • Framed Skylights: Delivered within 10-14 working days from the date of order.
  • Electric Opening Skylights: Delivered within 10-14 working days from the date of order.
  • Walk-On Skylights: Delivered within 10-14 working days from the date of order.
  • Skylight Blinds: Delivered within 10-14 working days from the date of order.

Delivery Hours:

  • Monday to Friday, between 8 am and 5 pm.

Once your payment has been processed, we will contact you to arrange a convenient delivery time.

Placing an Order: To view delivery costs, please add your desired products to the cart and enter the shipping address.

Delivery Areas:

  • Within London (M25): Our dedicated drivers ensure safe delivery. Please ensure that you or your builders are present to accept the delivery, as our drivers work alone and the vehicles are pre-loaded.
  • Outside London (M25): We utilize an external shipping network. The courier will contact you to schedule a suitable delivery time.
  • Extra Economy Shipping: Available for all areas except Northern Ireland and Scotland. In rare cases, delivery may be to a local depot if suitable vehicles are unavailable.

Important Notes:

  • Many of our products are heavy, ranging from 10kg to 280kg. Depending on the size and weight, additional help may be required for unloading (2-6 people).
  • We are not liable for any damage during unloading. It is the customer's responsibility to manage this process.
  • If no one is present to receive the delivery, our driver will attempt to contact you via phone, text, or voicemail. If contact cannot be made, the product will be returned to our warehouse.

Why Choose Our Insulated OSB Upstands?

Perfect Pitch for Water Drainage

Built-In 6° Pitch for perfect drainage

Exceptional Insulation

High Insulation with 40mm core and 15mm OSB

Ready-to-Install, Precision-Cut Fit

Factory-made to match our skylights exactly

Why Choose Our Skylight Blinds?

Smart Light Control for Every Room

With blackout or translucent options

Durable Design

Lasting Quality with cellular fabric and Somfy motors

Custom-Made

Made to Measure for a seamless skylight finish

Before and After

See how a space is completely transformed with a Regal Glass skylight.

  • Maximum daylight
  • Modern minimalist design
  • Superior insulation & UV protection

One change. Total transformation. Choose Regal Glass Group.

Our Roof Windows in Action

Photos from completed projects by our clients

Quick Shipping

Get it fast with our expedited shipping options.

Secure Payment

Shop safely with our secure online checkout.

Easy Returns

Hassle-free returns within 30 days.

20 Year Warranty

Enjoy peace of mind with our extensive warranty.

Frameless Skylights Glass Performance

Experience the perfect blend of natural light, energy efficiency, noise reduction, and UV protection with our precision-engineered glass.

Modern Design
100%
Solar energy transmittance (G value): g [%] 65
65%
UV transmission : 0 τuv [%]
0%
Light transmittance: τv [%] 72
72%
Thermal transmittance (U value): : 0.9 [W/(m².K)]
Min 3.0 [W/(m².K)] / Max 0.1 [W/(m².K)] 70%
Shading coefficient: 0.66 SC
( Maximum SC 1.00 / Maximum SC 0.20 ) 42%
Sound Reduction: 39 dB (-2;-7)
( Maximum 40dB / Minimum 30dB ) 90%

TILE & MEMBRANE COMPATIBLE

All Common UK Roof Types

FLAT ROOFS

Minimum 6° Pitch

EASY & SECURE INSTALLATION

Following Our Guides

Will It Fit My Roof?

1. Flat Roofs
Our skylights are suitable for flat roofs with a minimum pitch of 6° when installed with the correct upstand or flashing kit.

2. Tile & Membrane Compatible
Designed for all common UK roof types – from clay tiles and slate to EPDM, GRP, and bitumen flat roof membranes.

3. Easy & Secure Installation
Each skylight is engineered for watertight, airtight installation. Use our installation kits and add our pre-fabricated upstands for a perfect fit and finish.

Easy to replicate
Installation Guide

Dive into our user-friendly Installation Guide for a smooth skylight setup. Get the clarity you need, step-by-step.

Click below to explore the full guide.

Reviews

5
16 reviews
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16 reviews for Flat Roof Skylight 1000 x 3000 mm, Fixed, Frameless, Triple Glazed, 181.80kg, UV 0.9

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  1. Oliver Brown

    I opted for a bespoke skylight for my house in Glasgow, and Regal Glass delivered beyond expectations. The custom size fits perfectly, and the craftsmanship is top-notch. My roof has never looked better!

  2. Ava Adams

    My bedroom skylight is the highlight of my renovation. The light and ambiance it adds are truly magical. Kudos to Regal Glass for their top-notch products and service.

  3. Claire Watson

    Our living room has never felt more inviting since we added a large roof window. The quality of Regal Glass products is truly outstanding.

  4. Siobhan McCartney

    We live in Liverpool, and our flat roof skylight has brought so much natural light into our living room. The design is sleek and modern!

  5. Lewis Cunningham

    The flat roof skylight has been the perfect addition to our Aberdeen home. It brings in so much light, making the whole room feel bigger and more welcoming.

  6. Ryan McFarlane

    The flat roof skylight in our Belfast home brings in so much natural light. The quality is exceptional, and it looks amazing in our living room.

  7. Lily Kensington

    The modern frameless look is just what our home needed.

  8. Yusuf Rehman

    The fixed roof window in the bedroom has made a huge difference. It’s so much more comfortable now.

  9. Stefan Molnar

    Flat roof windows in the hallway make the house feel spacious and full of light.

  10. Viktor Szucs

    Our flat roof windows have made the living room so much brighter and more open.

  11. Mateusz Stanek

    Our fixed roof light in the bedroom brings in a cozy amount of natural light.

  12. David Puskar

    Frameless roof windows in the living room are the best addition we’ve made. It looks great!

  13. Oscar Harrington

    We weren’t sure about a flat roof window, but now we want more!

  14. James Lister

    Quick delivery, easy installation, and an incredible difference in our home’s brightness!

  15. Jacob Easton

    Our extension is now flooded with natural light, and we love it!

  16. Zoe Beckett

    Fantastic rooflight! The quality is exceptional, and it adds a premium feel to the house.

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FAQ

What’s the U-value and how energy efficient is it?

Our triple-glazed models offer U-values as low as 0.9 W/m²K (whole unit), helping you meet Part L regulations and reduce heat loss.

Does it come with self-cleaning glass?

Yes. All our skylights come with self-cleaning glass as standard to reduce dirt buildup.

Can I order custom sizes?

Yes. We offer made-to-measure rooflights to fit your exact requirements. Contact us for a custom quote.

Is it really leak-proof?

Yes. When installed with our official flashing kit and according to instructions, it is guaranteed to be watertight. 

Is the glass safe and shatterproof?

Absolutely. Each unit uses toughened outer and laminated inner glass that complies with UK safety standards (EN12150 / EN14449).

How long is the warranty?

We offer a 20-year guarantee on the glazing unit.