1200x2000mm Pitched Roof Skylight (6°-45°) | Frameless Triple Glazed Skylight | 0.9 U-Value | KingsView
1200x2000mm Pitched Roof Skylight (6°-45°) | Frameless Triple Glazed Skylight | 0.9 U-Value | KingsView Original price was: £ 1.688.00.Current price is: £ 995.92. incl. VAT
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Large Pitched Roof Window 1200x2500mm (6°-45°) | Fixed Triple Glazed Skylight | 0.9 U-Value | KingsView
Large Pitched Roof Window 1200x2500mm (6°-45°) | Fixed Triple Glazed Skylight | 0.9 U-Value | KingsView Original price was: £ 1.970.00.Current price is: £ 1.410.00. incl. VAT
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1200x2500mm Extra Large Skylight — Reinforced Triple Glazed Rooflight — No Water Pooling — 0.9 U-Value - Image 1
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1200x2500mm Extra Large Skylight — Reinforced Triple Glazed Rooflight — No Water Pooling — 0.9 U-Value
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1200x2500mm Extra Large Skylight — Reinforced Triple Glazed Rooflight — No Water Pooling — 0.9 U-Value - Image 22
1200x2500mm Extra Large Skylight — Reinforced Triple Glazed Rooflight — No Water Pooling — 0.9 U-Value - Image 23
1200x2500mm Extra Large Skylight — Reinforced Triple Glazed Rooflight — No Water Pooling — 0.9 U-Value - Image 24
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1200x2500mm Extra Large Skylight — Reinforced Triple Glazed Rooflight — No Water Pooling — 0.9 U-Value - Image 26

1200x2500mm Extra Large Skylight — Reinforced Triple Glazed Rooflight — No Water Pooling — 0.9 U-Value

(3 customer reviews)

Original price was: £ 1.970.00.Current price is: £ 1.410.00. incl. VAT

Special Pricing Ends In:
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LIVE STATUS: 14 units remaining

KingsView™ 1200x2500mm (Internal Size) Extra Large Elongated Skylight

Flood your home with natural light using our flagship 1.2m x 2.5m frameless rooflight. Specifically engineered for large-scale extensions and modern open-plan living, this architectural unit fits a 1200x2500mm internal structural opening, providing a seamless “glass-to-sky” view while delivering industry-leading thermal insulation.

Why the KingsView™ 2.5-Metre Series Excels:

  • Anti-Sag Engineering: Spanning 2.5 metres requires superior structural tension. We use an upgraded 8mm toughened glass top pane to ensure the unit remains perfectly rigid. This prevents “glass bowing” and ensures Zero Water Pooling for a leakproof, clear finish.
  • Maximum Thermal Performance: Achieve an incredible 0.9 W/m²K U-Value. This triple-glazed unit is fully Building Regulations compliant (Part L), designed to keep your home warm in winter and significantly reduce heat gain in summer.
  • Acoustic & Smart Glass: Blocks up to 39dB of external noise and features Sunlight-Activated Self-Cleaning technology—essential for maintaining large, hard-to-reach spans.
  • Certified Strength: Rated for heavy snow and wind loads, fully UKCA Certified, and backed by an industry-leading 20-Year Warranty.

Critical Specifications:

Internal Size 1200 x 2500 mm (Structural Opening)
Glass Build Triple Glazed with Reinforced 8mm Toughened Top Pane
Performance 0.9 U-Value | 39dB Sound Insulation
Unit Weight Approx. 161.7kg
Installation Min. 8°–10° Pitch Recommended for Run-off

— Delivery & Pitch Note:

To ensure the 2.5m span remains free of standing water, a minimum pitch of 8°–10° is required. Delivery is Kerbside Only (161.7kg); appropriate manpower or lifting equipment must be available on-site for offloading.

The ultimate elongated daylight solution for modern homes. Designed to exceed British Building Regulations for safety, strength, and energy efficiency.

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

14 in stock (can be backordered)

Inclined Insulated Upstand for Flat Roof Skylight 1200 x 2500 mm
Inclined Insulated Upstand for Flat Roof Skylight 1200 x 2500 mm

9 in stock (can be backordered)

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Original price was: £ 413.82.Current price is: £ 344.85. incl. VAT
1200x2500mm Electric Rooflight Blind | Flat Roof Skylight Shade | KingsView - Translucent, Hardwired
1200x2500mm Electric Rooflight Blind | Flat Roof Skylight Shade | KingsView - Translucent, Hardwired
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Original price was: £ 867.30.Current price is: £ 809.67. incl. VAT
Installation kit for 1 x Flat Roof Skylight 1200x2500mm
Installation kit for 1 x Flat Roof Skylight 1200x2500mm
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£ 88.60 incl. VAT
Foam Rope - Structural Glazing Tape – 9mm Thick (7.5m Rolls)
Foam Rope - Structural Glazing Tape – 9mm Thick (7.5m Rolls)
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+
£ 24.00 incl. VAT
Weatherproofing Sealant (Silicon) - DOWSIL™ 791, 310ml
Weatherproofing Sealant (Silicon) - DOWSIL™ 791, 310ml
-
+
£ 16.15 incl. VAT
Self-Cleaning Liquid Smart Glass Bottle 15ml
Self-Cleaning Liquid Smart Glass Bottle 15ml
-
+
£ 30.00 incl. VAT
Estimated delivery: 27th Feb – 5th Mar
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ACTIVE PROMOTION

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Specifications
Installation Drawing
flat-roof-skylight-frameless-rooflight-drawing-description-1200-x-2500-mm-rev1
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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

Firstly, we have our own fleet of delivery vehicles and friendly, helpful drivers who are committed to getting your skylights to you in perfect condition. We can deliver your order directly to your home or business at a time that suits you. Our drivers will carefully unload your order and even help you move it to the desired location. Alternatively, we also offer TPN Connect delivery services. TPN Connect is a trusted delivery network that specializes in handling fragile and delicate items, like skylights. They work with reputable courier services to ensure that your order is delivered safely and securely to your door. When you place your order with us, you’ll have the option to choose the delivery method that works best for you.

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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      Flat Roof
      Frameless Triple Glazed
      Skylights In Stock

      Internal Size (quoted)External Size
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      Custom size calculator - 300 - 3000 mm
      Custom size calculator - 300 - 5800 mm
      1200x2500mm Extra Large Triple Glazed Elongated Rooflight

      KingsView™ 1200 x 2500 mm Extra Large Architectural Elongated Rooflight

      The KingsView™ 1.2m x 2.5m is our premier extra-large elongated skylight, specifically engineered to bring show-stopping daylight to larger zones such as open-plan kitchens, breakfast bars, and vaulted ceilings. At this 2.5-metre span, structural integrity is paramount. While standard oversized units may suffer from glass deflection, our series utilizes an upgraded 8mm Toughened Top Pane to ensure a perfectly flat “infinity” aesthetic with zero compromise on safety.

      High-Performance Triple Glazing Profile:

      Our elongated rooflights are composed of three distinct glass panes, each contributing to the unit’s structural 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

      Technical Drawing 1200 x 2500 mm Rooflight

      Why Choose Our 1.2m x 2.5m Frameless Windows

      • Exceptional Thermal Control: Achieve an outstanding 0.9 W/m²K U-value. Our triple-glazed units with warm-edge spacer technology ensure your space remains warm in winter and cool in summer while significantly reducing energy bills.
      • Unobstructed Panoramic Views: The frameless “infinity” design maximizes natural light penetration, providing clean, uninterrupted daylight flow without bulky internal framing.
      • Self-Cleaning Convenience: Features a sunlight-activated self-cleaning coating—vital for extra-large rooflights where manual maintenance is difficult.
      • Acoustic & UV Protection: Advanced soundproofing ensures a peaceful indoor environment, while our Low-E coating safeguards your interior furnishings from harmful UV rays.
      • Regulation Compliant: Fully compliant with British Standards & Building Regulations and carries the UKCA/CE safety marking.

      Essential Installation Accessories

      Everything you need for a professional skylights flat roof installation:

      Skylight Blinds 1200x2500mm
      Achieve perfect light control and privacy with blinds tailored to your size.
      1200x2500mm Installation Kit
      A comprehensive kit ensuring secure, hassle-free installation for large zones.

      Professional Grade Accessories:

      • Foam Rope (9mm Thick): Structural glazing tape for effective sealing and crucial support.
      • DOWSIL™ 791 Weatherproofing: The industry-standard sealant for a 100% watertight finish.
      • Self-Cleaning Liquid Smart Glass: Restore and maintain the factory coating for effortless sparkling glass.

      Full Product Specification

      Internal Size (QUOTED) 1200 x 2500 mm
      External Glass Size 1400 x 2700 mm
      Glass Construction Reinforced 8mm Top Pane (Triple Glazed)
      Net Weight 161.70 kg
      U-Value 0.9 W/m²K
      Recommended Pitch 8° – 10° (Optimal for 2.5m Spans)

      🗺️ Where to Buy 1200 x 2500 mm Roof Lights Near Me

      Looking for a 1200 x 2500 mm (1.2 x 2.5 m) extra-large skylight near you? This size brings show-stopping daylight to larger zones. We manufacture frameless flat rooflights direct from our EU factory, combining visual elegance with structural performance professionals trust.

      ✅ 20-Year Guarantee | ✅ UKCA Certified | ✅ Custom Sizes & Bespoke Bespoke Solutions

      Logistics Note: This is a heavy-format unit (161.7kg). Delivery is kerbside only; please ensure adequate manpower or lifting equipment is available on-site for offloading.

      Download our full product catalogue or Contact us today to speak with a technical expert!

      Weight108 kg
      Dimensions205 × 10 × 145 cm
      BrandKingsView
      Internal Size1200 x 2500 mm
      External Size1400 x 2700 mm
      Glazing Type
      Glass Tint
      Self-Cleaning:Yes
      Roof TypeFlat Roof, Pitched 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 [%]

      3 reviews for 1200x2500mm Extra Large Skylight — Reinforced Triple Glazed Rooflight — No Water Pooling — 0.9 U-Value

      1. Ella Reynolds –

        Adding a skylight to our staircase area was a brilliant move. The difference in light and ambiance is astounding.

      2. Charlotte Evans –

        Adding a skylight to our dining room has truly elevated the entire ambiance of our home. The KingsView team here in Newcastle was exceptional, guiding us through every step with professionalism. The light it adds is just breathtaking.

      3. Michelle Hill –

        Simple, modern and effective. Just what we needed.

      Add a review

      Your email address will not be published. Required fields are marked *

      TECHNICAL GUIDE

      Step-by-Step Installation

      Ensure your project meets British Building Regulations with our verified fitting process[cite: 1, 4].

      01

      Structural Prep

      The upstand opening must allow for a 5mm tolerance on each side. The internal distance must be 10mm larger than the quoted size[cite: 40].

      02

      Support Timber

      Install 25x50mm timber support[cite: 49]. Ensure the top of the support for triple glazed units is exactly 42mm below the upstand top.

      03

      Seal & Level

      Apply foam rope on the timber support to level discrepancies and prevent glass cracking[cite: 69]. Failure to use foam rope voids your warranty[cite: 70, 83].

      Pro Tip: Use DOWSIL 791 Weatherproofing Sealant[cite: 103]. DO NOT use acrylic sealants as they cause loss of adhesion and leaks[cite: 104, 82].
      Watch Installation Videos [cite: 23] Download Full PDF Guide [cite: 7]

      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.

      The Direct Advantage

      Elite glazing expertise and factory-backed support at every stage.

      ⚡

      Rapid Logistics

      Free UK shipping & next-day dispatch.

      🏭

      Manufacturer Direct

      Direct accountability & elite integrity.

      🛡️

      20-Year Security

      Structural warranty & secure checkout.

      🧰

      Technical Aftercare

      Dedicated support for every spec.

      Our Roof Windows in Action

      Photos from completed projects by our clients

      flat-roof-skylights-frameless-window-regal-glass-new-gallery-image.jpg
      frameless-fixed-skylight-triple-glazed-roof-window-regal-3.jpg
      frameless-fixed-skylight-triple-glazed-roof-window-regal2.jpg
      fixed-skylight-frameless-rooflight-roof-window-var2.jpg
      fixed-skylight-frameless-rooflight-roof-window-var9.jpg
      frameless-fixed-skylight-triple-glazed-roof-window-regal-glass.jpg
      frameless-fixed-skylight-triple-glazed-roof-window-regal4.jpg
      what-should-you-consider-when-choosing-a-skylight.jpg

      Why Choose Our Insulated OSB Upstands?

      osb-upstand-for-flat-roof-skylight-google-image-small-sizes.jpg
      transperant-view-OSB-upstand-for-flat-roof.jpg
      osb-upstand-for-flat-roof-skylight-google-image-big-sizes.jpg

      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

      Brighten Your Home & Save More – Bundle & Save!

      Upgrade with our triple-glazed flat roof skylights for maximum light and energy efficiency.
      Add the Insulated Upstand and save up to 7% with our bundle offer!

      ✔️ Boost thermal performance
      ✔️ Cut energy costs
      ✔️ Enjoy lasting durability

      Get the complete solution at a better price – bundle today!

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

      -33% -28%
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      1200x2500mm Extra Large Skylight — Reinforced Triple Glazed Rooflight — No Water Pooling — 0.9 U-Value

      Original price was: £ 1.970.00.Current price is: £ 1.311.30. incl. VAT

      KingsView™ 1200x2500mm (Internal Size) Extra Large Elongated Skylight

      Flood your home with natural light using our flagship 1.2m x 2.5m frameless rooflight. Specifically engineered for large-scale extensions and modern open-plan living, this architectural unit fits a 1200x2500mm internal structural opening, providing a seamless "glass-to-sky" view while delivering industry-leading thermal insulation.

      Why the KingsView™ 2.5-Metre Series Excels:

      • Anti-Sag Engineering: Spanning 2.5 metres requires superior structural tension. We use an upgraded 8mm toughened glass top pane to ensure the unit remains perfectly rigid. This prevents "glass bowing" and ensures Zero Water Pooling for a leakproof, clear finish.
      • Maximum Thermal Performance: Achieve an incredible 0.9 W/m²K U-Value. This triple-glazed unit is fully Building Regulations compliant (Part L), designed to keep your home warm in winter and significantly reduce heat gain in summer.
      • Acoustic & Smart Glass: Blocks up to 39dB of external noise and features Sunlight-Activated Self-Cleaning technology—essential for maintaining large, hard-to-reach spans.
      • Certified Strength: Rated for heavy snow and wind loads, fully UKCA Certified, and backed by an industry-leading 20-Year Warranty.

      Critical Specifications:

      Internal Size 1200 x 2500 mm (Structural Opening)
      Glass Build Triple Glazed with Reinforced 8mm Toughened Top Pane
      Performance 0.9 U-Value | 39dB Sound Insulation
      Unit Weight Approx. 161.7kg
      Installation Min. 8°–10° Pitch Recommended for Run-off

      — Delivery & Pitch Note:

      To ensure the 2.5m span remains free of standing water, a minimum pitch of 8°–10° is required. Delivery is Kerbside Only (161.7kg); appropriate manpower or lifting equipment must be available on-site for offloading.

      The ultimate elongated daylight solution for modern homes. Designed to exceed British Building Regulations for safety, strength, and energy efficiency.

      -23% -17%
      Quick view
      Add to wishlist

      Inclined Insulated Upstand for Flat Roof Skylight 1200 x 2500 mm

      ,
      Original price was: £ 413.82.Current price is: £ 320.71. incl. VAT
      • 15mm OSB
      • 40mm core cavity insulation
      • 6 degrees natural incline across the short side
      • Suitable for cold and warm roofs
      • Compatible with all roof coverings
      • Precision-engineered sizes
      • Available off the shelf
      Quick view
      Add to wishlist

      Installation kit for 1 x Flat Roof Skylight 1200x2500mm

      £ 88.60 incl. VAT
      • Weatherproofing Sealant (Silicon) – DOWSIL™ 791, 310ml  - 4pcs
      • Foam Rope – Structural Glazing Tape – 9mm Thick (7.5m Rolls) - 1pcs
      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: £ 1.311.30. incl. VAT
        Original price was: £ 413.82.Current price is: £ 320.71. incl. VAT
        £ 88.60 incl. VAT
        Original price was: £ 2.467.82.Current price is: £ 1.716.01. 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

        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.

        Reviews

        3 reviews for 1200x2500mm Extra Large Skylight — Reinforced Triple Glazed Rooflight — No Water Pooling — 0.9 U-Value

        1. Ella Reynolds –

          Adding a skylight to our staircase area was a brilliant move. The difference in light and ambiance is astounding.

        2. Charlotte Evans –

          Adding a skylight to our dining room has truly elevated the entire ambiance of our home. The KingsView team here in Newcastle was exceptional, guiding us through every step with professionalism. The light it adds is just breathtaking.

        3. Michelle Hill –

          Simple, modern and effective. Just what we needed.

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