premium flat roof roof window 1200 x 2500 mm with statement glass format
Flat Roof Skylight 1200 x 2500 mm – Fixed Frameless Triple Glazed – U-Value 0.9 Original price was: £ 1.970.00.Current price is: £ 1.367.70. incl. VAT
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frameless flat roof roof window 1500 x 2500 mm with wide uninterrupted glazing
Flat Roof Skylight 1500 x 2500 mm – Fixed Frameless Triple Glazed – U-Value 0.9 Original price was: £ 2.585.00.Current price is: £ 1.705.06. incl. VAT
-31%
modern pitched roof skylight 1200 x 2500 mm with statement sloped glazing
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Pitched Roof Skylight 1200 x 2500 mm – Fixed Frameless Triple Glazed – U-Value 0.9 - Image 27
Pitched Roof Skylight 1200 x 2500 mm – Fixed Frameless Triple Glazed – U-Value 0.9 - Image 28
Pitched Roof Skylight 1200 x 2500 mm – Fixed Frameless Triple Glazed – U-Value 0.9 - Image 29
modern pitched roof skylight 1200 x 2500 mm with statement sloped glazing
Pitched Roof Skylight 1200 x 2500 mm – Fixed Frameless Triple Glazed – U-Value 0.9 - Image 2
Pitched Roof Skylight 1200 x 2500 mm – Fixed Frameless Triple Glazed – U-Value 0.9 - Image 3
Pitched Roof Skylight 1200 x 2500 mm – Fixed Frameless Triple Glazed – U-Value 0.9 - Image 4
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Pitched Roof Skylight 1200 x 2500 mm – Fixed Frameless Triple Glazed – U-Value 0.9 - Image 29

Pitched Roof Skylight 1200 x 2500 mm – Fixed Frameless Triple Glazed – U-Value 0.9

(8 customer reviews)

Original price was: £ 1.970.00.Current price is: £ 1.367.70. incl. VAT

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The UK’s Premier Extra-Large Architectural Solution

1200 x 2500 mm Frameless Triple Glazed Skylight

Experience show-stopping architectural impact with the KingsView™ 1.2m x 2.5m skylight. Specifically engineered for large spans, this unit utilizes heavy-duty reinforced 8mm glass to ensure total structural integrity and zero sagging.

✔
Elite Thermal Barrier: Market-leading 0.9 W/m²K U-Value.
✔
Reinforced Safety: 8mm-6mm-6mm glass matrix prevents water pooling.
✔
Total Clarity: UV-activated self-cleaning coating for minimal upkeep.
✔
Acoustic Shield: High-performance 39dB sound reduction.
Technical Snapshot
Internal / External Size 1200×2500 / 1400×2700 mm
Unit Weight 161.70kg (Reinforced)
Glazing Spec 8mm / 6mm / 6mm Low-E
Pitch Range 6° to 45° Degrees
Warranty KingsView™ 20-Year

⚠️ Some sellers offer large skylights with thin glass to cut costs — but this is unsafe.
Tests show that large skylights need thicker, reinforced glass to prevent sagging and water pooling.

All Skylights.co.uk products are built to strict safety standards, ensuring lasting strength and reliability.

CE & ISO CERTIFIED
Precision Fit: 10-year leak-proof warranty included.
Transit-Safe: Arrived damaged? We swap it in 24h.

Available on back-order

electric skylight shade 1200x2500 mm large pitched blind
Skylight Blinds for Pitched Roof Window 1200x2500mm - Translucent, Hardwired
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Original price was: £ 1.142.40.Current price is: £ 809.67. incl. VAT
extra wide skylight base 1200 x 2500 mm OSB insulated support
Insulated Upstand for Pitched Roof Skylight 1200 x 2500 mm

Available on back-order

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+
Original price was: £ 351.75.Current price is: £ 293.12. incl. VAT
installation-kit-for-pitched-skylights-tiled-roof-1200x2500mm
Installation kit for 1 x Pitched Roof Skylight 1200x2500mm (for tiled & slate roofs)
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+
£ 284.40 incl. VAT
Self-Cleaning Liquid Smart Glass Bottle 15ml
Self-Cleaning Liquid Smart Glass Bottle 15ml
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£ 30.00 incl. VAT
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Specifications
Installation Drawing
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Delivery & Return

Delivery & Return

Free delivery for custom size skylights and all orders delivered within London M25 area. For your convenience we offer Nationwide Delivery and Next Day Delivery Option.

Delivery Options Overview

Free Delivery

We offer free delivery on:

  • All custom-size skylights

  • All orders within the London M25 area

  • Selected UK postcodes

Nationwide & Next-Day Delivery

To make your experience as smooth as possible, we offer:

  • Nationwide delivery across the UK

  • A Next-Day Delivery option (subject to availability)

Delivery Timeframes

  • Standard orders are delivered within 3–6 working days, unless the item is on back-order.

Once your payment has been received, we will contact you directly to arrange a suitable delivery time.

💡 To calculate your delivery cost, simply add the products to your cart and enter your shipping address.

Important Notice Before Delivery

Please do not book cranes, equipment, or labour until your delivery date is confirmed, as we cannot take responsibility for any scheduling conflicts.

Deliveries Within the London M25 Area

  • All deliveries in the London M25 area are handled directly by our in-house delivery team to ensure the safe and secure arrival of your products.

  • As our drivers work solo and vehicles are pre-loaded at our warehouse, we ask that you or your builders be present onsite to assist with unloading.

Deliveries Outside the M25

  • For addresses outside the M25, we work with a trusted external courier network.

  • Once dispatched, the courier will contact you to schedule a delivery time.

Delivery Schedule

Deliveries are made:

  • Monday to Friday

  • Between 8:00 a.m. and 5:00 p.m.

  • In rare cases, delivery may be delayed due to traffic up to 8:00 p.m.

While we can provide a 1–2 hour notice on the day of delivery, we unfortunately cannot guarantee an exact delivery time or specific timeslot.

Shipping Restrictions & Notes

  • Extra Economy Shipping is available across the UK excluding Northern Ireland and Scotland.

  • In some rare cases, if couriers do not have suitable vehicles to access your property, you may be asked to collect your order from a local depot (usually within a 20-minute drive).

Product Weight & Unloading Responsibility

Our products are heavy, ranging from 10kg to 280kg. Depending on your order, 2, 4, or even 6 people may be required to unload or handball safely.

In some cases the vehicle of the courier might not be equipped with a tail lift, in which case every customer has the right to disassemble the pallet and remove the units one by one, keeping their wooden frames for safety reasons.

🔧 Skylights.co.uk is not liable for any damages caused during unloading. It is the customer’s responsibility to arrange sufficient help for unloading on site.

Missed Delivery Protocol

If no one is available to receive the delivery, our driver will attempt to contact you via phone, text, and voicemail.

If we are unable to make contact, the delivery will be returned to our warehouse and a new delivery will need to be arranged.

Delivery Options

Nationwide

Standard Delivery
Get it in 3-6 working days

All orders within London M25. We deliver Monday to Friday between 8am-5pm.

Nationwide

Next Day
Delivery

The orders received until 12:00pm can be delivered on next working day. There is an additional charge.

London

Local Pickup
From Our Warehouse

You can pick it from our warehouse on this specific time: Monday to Friday between 8am-5pm.

 

Nationwide

Delivery Of
Custom Size Skylights

Delivered for free of charge. Usually takes between 3 to 6 weeks to be made and shipped over to UK.

    How it Works?

    Step 1

    Order the Product and Receive Email with Order confirmation

    Step 2

    Update on your Delivery Date with Message or Call

    Step 3

    Wait for Your Order to Arrive

    Step 4

    Arange people to help you load of the skylight

    Step 5

    Accept your Delivery with our Drivers or Book Suitable Delivery Date with Depot.

      Exchange or Return of Goods

      A 25% restocking fee will be charged on all returned merchandise, unless defective.
      Skylights1.com is not responsible for any labor costs, which occur as the result of the installation of wrong or defective parts. If your shipment arrives and appears damaged please inspect the package thoroughly and if the contents appear damaged please refuse the shipment. We will do everything we can to have a new order rushed out to you. Return ship fees are the responsibility of the customer. Refunds for returned items are processed within 10 working days.

      Before placing an order, please make sure that you have chosen the correct unit size and have consulted your roofer in advance. If you have purchased the wrong size(s), we will have to cancel and refund the whole order. In this case we will deduct up to 5% transaction fee and in the cases when we have already sent your order, we will also deduct the return shipping fees. Please keep in mind that refunds are processed within 10 working days after units are returned to our warehouse.

      The following items may be returned for a refund within 15 days of purchase:

      • Merchandise that has not been removed from its original packing.
      • Defective merchandise.
      • Merchandise that was mispacked or was not shipped correctly.
      • Merchandise that has not been installed. 
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      Download Brochure
      See Other Sizes in Stock

      Pitched Roof
      Frameless Triple Glazed

      Skylights In Stock

      Internal Size (quoted)External Size
      300x300mm500x500mm
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      400x1500mm600x1700mm
      400x2000mm600x2200mm
      400x3000mm600x3200mm
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      500x1500mm700x1700mm
      500x3000mm700x3200mm
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      600x2500mm800x2700mm
      600x3000mm800x3200mm
      800x800mm1000x1000mm
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      800x2500mm1000x2700mm
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      1000x3000mm1200x3200mm
      1200x1200mm1400x1400mm
      1200x1800mm1400x2000mm
      1200x2000mm1400x2200mm
      1200x2500mm1400x2700mm
      1500x1500mm1700x1700mm
      1500x2000mm1700x2200mm
      1500x2500mm1700x2700mm
      1500x3000mm1700x3200mm
      See other sizes in stock
      Custom size calculator - 300 - 3000 mm
      Custom size calculator - 300 - 5800 mm

      Payment Methods:

      Premium Pitched Roof Skylights

      Transform your space with natural light using the Pitched Roof Skylight 1200 x 2500 mm. This architectural marvel merges design and functionality seamlessly. Our 20+ years of expertise in crafting premium skylights is evident in this product, offering beautiful natural illumination year-round and a stunning minimalist aesthetic that complements your existing roofline.

      Why Choose Our Frameless Pitched Roof Windows

      Unparalleled Performance:

      • Exceptional Thermal Efficiency: Advanced triple-glazed units with a 15mm warm edge spacer filled with Argon gas achieve an impressive U-value of 0.9 W/m²K. Enjoy significant energy bill reductions and year-round comfort in your home.
      • Unobstructed Views: The frameless design maximizes natural light penetration, offering breathtaking panoramic vistas and a sleek, minimalist aesthetic that integrates seamlessly with your pitched roof’s architecture.
      • Effortless Maintenance: Enjoy spotless glass with our self-cleaning technology, activated by sunlight for minimal upkeep.

      Additional Benefits:

      • Versatile Installation: Suitable for roof pitches between 6° and 45°, making it a great fit for many homes.
      • Peaceful Ambiance: Provides effective soundproofing for a quieter indoor environment.
      • Sun Safety: Offers protection against harmful UV rays, safeguarding your interiors.
      • Safety First: Constructed with safety-toughened glass for ultimate peace of mind.
      • Regulation Compliant: Meets all British Standards & Building Regulations and carries the CE safety marking.

      Backed by a 20-year warranty, our skylights are a testament to superior durability and performance.

      Essential Skylight Accessories

      Enhance your pitched roof skylight experience with these essential add-ons for a seamless installation and optimal performance:

      Our Pitched 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

      Choose Skylights.co.uk

      We offer an extensive range of standard sizes, including the popular 2500 x 1200 mm skylight (also known as 2.5 x 1.2 m roof light), as well as fully custom skylights to suit your specific needs.

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

      Ready to discuss your skylight needs? Contact us today!

      What’s the installation process for Pitched roof windows 1200 x 2500 mm

      We provide detailed installation guides for all ranges of their roof windows. You can watch the video or read the instructions.

      🗺️ 1200 x 2500 mm Pitched Roof Lights Near Me

      Looking to buy a 1200 x 2500 mm pitched roof light near you? Also known as a 1.2 x 2.5 m large skylight, this impressive format is perfect for pitched roof kitchens, vaulted loft conversions, and expansive architectural interiors. We craft frameless pitched roof windows that offer show-stopping daylight, structural strength, and energy-saving performance.

      ✅ Bespoke Large Skylight – Designed for Impact
      ✅ Triple Glazed – Excellent Thermal Control
      ✅ Built for UK Weather – Condensation-Free Design
      ✅ Fast UK Delivery from Our In-House Factory
      ✅ 20-Year Guarantee – No Hidden Terms

      Each skylight is UKCA-certified, engineered for pitched roof integration, and delivered across the UK with care—ready to bring clarity, scale, and modern elegance to your next big build.

      Weight108 kg
      Dimensions of packaging55 × 10 × 55 cm
      BrandKingsView
      ColorClear
      Internal Size1200 x 2500 mm
      External Size1400 x 2700 mm
      Glazing Type
      Glass Tint
      Self-Cleaning:Yes
      Roof TypePitched Roof
      Skylight TypeFrameless
      Top Glass Pane:8 mm Planibel Clearlite / Thermally toughened glass EN 12150
      Air Gap16 mm Argon 90%
      Middle Glass Pane:6 mm Planibel Clearlite / Thermally toughened glass EN 12150
      Air Gap16 mm Argon 90%
      Bottom Glass Pane:6 mm iplus 1.1 pos.5 Thermally toughened glass with Low-E coating EN 12150
      Spacer Type15mm Black Warm Edge
      U value0.9 [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 : SC0.66
      Selectivity1.26
      UV transmission : τuv [%]

      8 reviews for Pitched Roof Skylight 1200 x 2500 mm – Fixed Frameless Triple Glazed – U-Value 0.9

      1. Angus McCarthy –

        Installed a pitched skylight, and it’s been the best decision for our living room. The natural light enhancement is unparalleled.

      2. Ashley Johnson –

        The installation of a roof window in our bedroom was smooth and hassle-free, thanks to KingsView Glass. The difference it’s made is night and day.

      3. Sophie Ellis –

        In Leeds, we’re no strangers to gloomy days, but our new large skylight from Skylights.co.uk has made such a difference! Even on overcast days, our living room is bright and inviting.

      4. Sean Fraser –

        Installed a 1200×2500 mm skylight in a client’s home and the feedback has been phenomenal. The natural light and the elegance it adds to the space is just unmatched. Proud to work with such high-standard products.

      5. Stanley Oldridge –

        The driver took care to ensure no damage. Superb service.

      6. Alfred Broxbourne –

        So pleased with how quickly it arrived and how great it looks.

      7. Gerald Whitcombe –

        Everything went perfectly. Highly recommend this product.

      8. Mabel Torrington –

        Clear instructions made installation a breeze. Great value.

      Add a review

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      Our Roof Windows in Action

      Photos from completed projects by our clients

      frameless-fixed-skylight-triple-glazed-roof-window-regal5
      best-skylight-types-for-maximum-light
      practical-examples-roof-lights
      Pitched roof skylight window in London
      Pitched roof skylight in London
      pitched-roof-skylights-new-gallery-image-regal-glass3

      Transform your home with our triple-glazed flat roof skylights, maximizing natural light and thermal efficiency. Pair them with our separately sold Insulated Upstand, featuring 40mm core insulation to cut heat loss and lower energy costs.

      Our triple-glazed pitched roof skylights flood your space with natural light while delivering exceptional thermal efficiency. Pair them with our separately sold Insulated Upstand, featuring 40mm core insulation to minimize heat loss and cut energy costs.

      Why Choose Our Insulated OSB Upstands?

      osb-upstand-pitched-regal-glass-ad-image2.jpg
      osb-upstand-regal-glass-drawing-for-pitched-upstand.jpg
      osb-upstand-pitched-regal-glass-ad-image1.jpg

      Exceptional Insulation

      High Insulation with 40mm core and 15mm OSB

      Ready-to-Install, Precision-Cut Fit

      Factory-made to match our skylights exactly

      Brighten Your Home & Save – Bundle and Save!

      Upgrade to our triple-glazed pitched roof skylights for stunning natural light and superior energy efficiency.
      Add our Insulated Upstand and save up to 7% when you bundle!

      ✔️ Maximize thermal performance
      ✔️ Lower your energy bills
      ✔️ Enjoy long-lasting durability

      Get the complete, premium solution for less – bundle your skylight and upstand today!

      Get a Bundle with extra 7 % Discount on Skylight and Upstand

      -35% -31%
      modern pitched roof skylight 1200 x 2500 mm with statement sloped glazing
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      Pitched Roof Skylight 1200 x 2500 mm – Fixed Frameless Triple Glazed – U-Value 0.9

      Original price was: £ 1.970.00.Current price is: £ 1.271.96. incl. VAT

      The UK’s Premier Extra-Large Architectural Solution

      1200 x 2500 mm Frameless Triple Glazed Skylight

      Experience show-stopping architectural impact with the KingsView™ 1.2m x 2.5m skylight. Specifically engineered for large spans, this unit utilizes heavy-duty reinforced 8mm glass to ensure total structural integrity and zero sagging.

      ✔ Elite Thermal Barrier: Market-leading 0.9 W/m²K U-Value.
      ✔ Reinforced Safety: 8mm-6mm-6mm glass matrix prevents water pooling.
      ✔ Total Clarity: UV-activated self-cleaning coating for minimal upkeep.
      ✔ Acoustic Shield: High-performance 39dB sound reduction.
      Technical Snapshot
      Internal / External Size 1200x2500 / 1400x2700 mm
      Unit Weight 161.70kg (Reinforced)
      Glazing Spec 8mm / 6mm / 6mm Low-E
      Pitch Range 6° to 45° Degrees
      Warranty KingsView™ 20-Year
      -23% -17%
      extra wide skylight base 1200 x 2500 mm OSB insulated support
      Quick view
      Add to wishlist

      Insulated Upstand for Pitched Roof Skylight 1200 x 2500 mm

      Original price was: £ 351.75.Current price is: £ 272.60. incl. VAT
      • 15mm OSB
      • 40mm core cavity insulation
      • Suitable for cold and warm roofs
      • Compatible with all roof coverings
      • Precision-engineered sizes
      • Available off the shelf
      installation-kit-for-pitched-skylights-tiled-roof-1200x2500mm
      Quick view
      Add to wishlist

      Installation kit for 1 x Pitched Roof Skylight 1200x2500mm (for tiled & slate roofs)

      ,
      £ 284.40 incl. VAT
      • Weatherproofing Sealant (Silicon) – DOWSIL™ 791, 310ml  - 4 pcs
      • Foam Rope – Structural Glazing Tape – 9mm Thick (7.5m Rolls) - 1 pcs
      • Lead Flashing Textured 450mm x 5m Roll Grey – Easy-Trim - 2 pcs
      This kit is for one skylight window. With our all-in-one kit, you can save time and effort by not having to calculate which accessories and how many pieces you need for your installation. We recommend these products as fully compatible with our glazing unit, ensuring a secure and reliable installation.
        Original price was: £ 1.970.00.Current price is: £ 1.271.96. incl. VAT
        Original price was: £ 351.75.Current price is: £ 272.60. incl. VAT
        £ 284.40 incl. VAT
        Original price was: £ 2.606.15.Current price is: £ 1.828.96. incl. VAT
        For 3 items

        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

        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.

        FAQ

        Will this rooflight work with my roof?

        Yes. This unit is designed for pitched roofs between 6° and 45° and is compatible with both tile and slate. We also supply flat roof options separately.

        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 this skylight compatible with all roof constructions?

        Yes, our skylights can be installed on both cold and warm roof types.

        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.

        Customer Reviews

        8 reviews for Pitched Roof Skylight 1200 x 2500 mm – Fixed Frameless Triple Glazed – U-Value 0.9

        1. Angus McCarthy –

          Installed a pitched skylight, and it’s been the best decision for our living room. The natural light enhancement is unparalleled.

        2. Ashley Johnson –

          The installation of a roof window in our bedroom was smooth and hassle-free, thanks to KingsView Glass. The difference it’s made is night and day.

        3. Sophie Ellis –

          In Leeds, we’re no strangers to gloomy days, but our new large skylight from Skylights.co.uk has made such a difference! Even on overcast days, our living room is bright and inviting.

        4. Sean Fraser –

          Installed a 1200×2500 mm skylight in a client’s home and the feedback has been phenomenal. The natural light and the elegance it adds to the space is just unmatched. Proud to work with such high-standard products.

        5. Stanley Oldridge –

          The driver took care to ensure no damage. Superb service.

        6. Alfred Broxbourne –

          So pleased with how quickly it arrived and how great it looks.

        7. Gerald Whitcombe –

          Everything went perfectly. Highly recommend this product.

        8. Mabel Torrington –

          Clear instructions made installation a breeze. Great value.

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