pitched roof roof window 1000 x 3000 mm frameless design with high performance glazing
1000 x 3000 mm Skylight, Pitched Roof, Triple Glazed, Frameless, 181.80kg, UV 0.9 Original price was: £1,670.94.Current price is: £1,223.67. incl. VAT
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pitched roof rooflight 1200 x 1800 mm premium design with high performance glazing
1200 x 1800 mm Skylight, Pitched Roof, Triple Glazed, Frameless, 106.80kg, UV 0.9 Original price was: £939.45.Current price is: £735.20. incl. VAT
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pitched roof skylight 1200 x 1200 mm triple glazed design with high performance glazing
1200 x 1200 mm Skylight, Pitched Roof, Triple Glazed, Frameless, 72.60kg, UV 0.9 - Image 2
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1200 x 1200 mm Skylight, Pitched Roof, Triple Glazed, Frameless, 72.60kg, UV 0.9 - Image 5
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1200 x 1200 mm Skylight, Pitched Roof, Triple Glazed, Frameless, 72.60kg, UV 0.9 - Image 8
1200 x 1200 mm Skylight, Pitched Roof, Triple Glazed, Frameless, 72.60kg, UV 0.9 - Image 9
1200 x 1200 mm Skylight, Pitched Roof, Triple Glazed, Frameless, 72.60kg, UV 0.9 - Image 10
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1200 x 1200 mm Skylight, Pitched Roof, Triple Glazed, Frameless, 72.60kg, UV 0.9 - Image 16
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pitched roof skylight 1200 x 1200 mm triple glazed design with high performance glazing
1200 x 1200 mm Skylight, Pitched Roof, Triple Glazed, Frameless, 72.60kg, UV 0.9 - Image 2
1200 x 1200 mm Skylight, Pitched Roof, Triple Glazed, Frameless, 72.60kg, UV 0.9 - Image 3
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1200 x 1200 mm Skylight, Pitched Roof, Triple Glazed, Frameless, 72.60kg, UV 0.9 - Image 5
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1200 x 1200 mm Skylight, Pitched Roof, Triple Glazed, Frameless, 72.60kg, UV 0.9 - Image 8
1200 x 1200 mm Skylight, Pitched Roof, Triple Glazed, Frameless, 72.60kg, UV 0.9 - Image 9
1200 x 1200 mm Skylight, Pitched Roof, Triple Glazed, Frameless, 72.60kg, UV 0.9 - Image 10
1200 x 1200 mm Skylight, Pitched Roof, Triple Glazed, Frameless, 72.60kg, UV 0.9 - Image 11
1200 x 1200 mm Skylight, Pitched Roof, Triple Glazed, Frameless, 72.60kg, UV 0.9 - Image 12
1200 x 1200 mm Skylight, Pitched Roof, Triple Glazed, Frameless, 72.60kg, UV 0.9 - Image 13
1200 x 1200 mm Skylight, Pitched Roof, Triple Glazed, Frameless, 72.60kg, UV 0.9 - Image 14
1200 x 1200 mm Skylight, Pitched Roof, Triple Glazed, Frameless, 72.60kg, UV 0.9 - Image 15
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1200 x 1200 mm Skylight, Pitched Roof, Triple Glazed, Frameless, 72.60kg, UV 0.9

(6 customer reviews)

Original price was: £642.67.Current price is: £469.28. incl. VAT

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Details:

Engineered Leakproof Design – Reliable in Any Weather
Suitable for: Roof slopes from 6° up to 45°

* Glazing Type: Triple Glazed
* Internal glass size: 1200 x 1200 mm
* U Value: 0.9 W/m²K
* G Value: 58%
* Noise-proofing value: 39 dB
* Free delivery within London (M25)
* Nationwide Delivery
* 20-Year Warranty

⚠️ Important Notice

Some suppliers cut costs by using thin glass in large rooflights — this can cause sagging and water pooling.
Our tests show that reinforced, thicker glass is essential for safety and durability.

At Saris-Extensions, every rooflight is built to UK standards, ensuring lasting strength and peace of mind.

PDFs for Download:

Specifications
Handling
Installation
See other sizes in stock
Custom size Calculator - From 400 to 3000mm
Oversized Calculator - From 300 to 5800mm
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21 in stock

large skylight base 1200 x 1200 mm insulated OSB upstand for rooflight install
Insulated OSB Upstand 1200 x 1200 mm (for Pitched roof)

Available on backorder (Delivery within 2-3 weeks)

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Original price was: £235.01.Current price is: £195.84. incl. VAT
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Electric Blinds for Pitched Roof Skylight 1200x1200mm - Hardwired, Translucent
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Original price was: £798.00.Current price is: £666.33. incl. VAT
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Installation kit for 1 x Pitched Roof Skylight 1200x1200mm (for tiled & slate roofs)
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£256.98 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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£18.41 incl. VAT
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Weatherproofing Sealant ( Sillicon ) - DOWSIL™ 791, 310ml
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£16.25 incl. VAT
Easy-Trim-Lead-Flashing-Textured-450mm-x-5m-Roll-Grey
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Self-Cleaning Liquid Smart Glass Bottle 15ml
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Weight72.60 kg
Dimensions of packaging55 × 10 × 55 cm
BrandSaris-Extensions
ManufacturerSaris-UK Ltd
ColorClear
Size1200×1200

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pitched roof skylight 1200 x 1200 mm triple glazed design with high performance glazing
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1200 x 1200 mm Skylight, Pitched Roof, Triple Glazed, Frameless, 72.60kg, UV 0.9

Original price was: £642.67.Current price is: £422.35. incl. VAT

21 in stock

-25% -17%
large skylight base 1200 x 1200 mm insulated OSB upstand for rooflight install
Quick view

Insulated OSB Upstand 1200 x 1200 mm (for Pitched roof)

Original price was: £235.01.Current price is: £176.26. incl. VAT

Available on backorder (Delivery within 2-3 weeks)

installation-kit-pitched-roof-skylights-tiled-roof-1200x1200
Quick view

Installation kit for 1 x Pitched Roof Skylight 1200x1200mm (for tiled & slate roofs)

£256.98 incl. VAT
    Original price was: £642.67.Current price is: £422.35. incl. VAT
    Original price was: £235.01.Current price is: £176.26. incl. VAT
    £256.98 incl. VAT
    £256.98 incl. VAT
    Original price was: £1,391.64.Current price is: £1,112.57. incl. VAT
    For 3 items
    SPECIFICATIONS

    Pitched Roof Skylight / Rooflight 1200 x 1200 mm

    Our pitched roof skylights are manufactured to the highest standard making them frameless from the inside and out. They are easily installed with lead flashing, that’s cut on-site that is suitable for all roofs. As they are frameless internally they let in more light.

    This high-performance, non-opening frameless skylight is triple glazed with 6mm toughened, self-cleaning glass and a U Value of only 0.9 W/m²K. The internal quoted glass size is 1200 x 1200 mm, see the structural diagram below.

    When purchasing a pitched roof skylight for a tiled roof from us it is very simple.

    All our skylights come triple-glazed as standard and have solar protection.

    The upstand is formed with the same opening as you can see in our drawings.

    All you need to add is the flashing of your choice in our accessories section.

    The flashing is then wrapped around your upstand sealing the upstand to your roof tiles.

    Make sure you have added the right amount of flashing, the full circumference of your skylight will require flashing.

    Our rolls come in 7.5-meter lengths. Let’s say you have bought a 1000 x 2000mm skylight you then require a total of 6 meters as you have 2x 1 meter sides and 2x 2 meters becoming a total of six lineal meters therefore one roll of flashing will be required.

     

    • Glazing Type: Triple Glazed
    • Internal Glass Size (QUOTED): 1200 x 1200 mm
    • External Glass Size: 1400 x 1400 mm
    • Top Glass Pane:6 mm Planibel Clearlite / Thermally toughened glass BS EN 12150
    • Spacer Type: 15mm Black Warm Edge
    • Air Gap: 15mm 90% Argon Filled
    • Middle Glass Pane:6 mm iplus Thermally toughened glass with Low-E coating EN 12150
    • Bottom Glass Pane:Stratobel Clearlite 44.2 / Laminated glass EN 14449
    • U Value: 0.9 W/m²K
    • G Value: 58%
    • Net Weight: 72.60kg
    • Self-Cleaning: YES
    • UV Protected: YES
    • Clear Tint

    Safety and Compliance: Choosing the Right Skylight

    When it comes to choosing a roof light for your home, we know that safety is an important deciding factor.

    This product conforms to British Standards & Building Regulations and has all Safety Markings.

    It is CE marked which is a certification mark that indicates conformity with the relevant EU directives and standards for products sold within Europe.

    Our Skylights can be installed at a maximum pitch of 45 degrees.

    Installation Specifications and Recommendations:

    • Internal Dimensions: It's important to note that the top pane of glass includes a black border, extending the external dimensions of the unit by 200 millimetres in each direction.
    • Creating the Opening: When preparing for installation, allow an additional 10 millimetres internally from upstand to upstand for proper fitting. For example, for a 600 by 900 unit, the opening should be 610 by 910 millimetres internally.
    • Upstand Construction: We recommend constructing the upstand (the wooden framework housing the skylight) using two-by-one or two-by-two-inch timbers.
    • Foam Rope and Sealant Use: For optimal installation, install foam rope on top of the internal supporting baton, which helps level out weight discrepancies and stress on the glass. We advise using Dowsil 791 black-coloured sealant to create a watertight perimeter around your upstand. Please note that acrylic sealants are not compatible with our units and should not be used.

    Find Your Perfect Fit with Our Custom Size Skylight Calculators

    Explore the world of Pitched Roof Skylights

    At Saris-Extensions, we combine elegance with cutting-edge technology. These skylights are not just additions to your roof; they are masterpieces of design, enhancing the energy efficiency and aesthetic appeal of your home or office. Embrace the seamless integration of style and functionality with our Pitched Roof Skylights.

    Best Price
    20 Years Warranty
    Guarantee Payment Safety
    Self Cleaning
    Clear Tint
    UV Protected
    Free Delivery within London (M25)
    Аll Glass Panels
    Safety Toughened and Laminated Glass
    Made In EU
    London Based Stock
    Quick and easy installation
    Step By Step installation guide
    24/7 technical helpline
    Additional information
    Weight72.60 kg
    Dimensions of packaging55 × 10 × 55 cm
    BrandSaris-Extensions
    ManufacturerSaris-UK Ltd
    ColorClear
    Size1200×1200
    SHIPPING

    Free Delivery:

    • Available on all orders over £400 within the London (M25) area.

    Delivery Times:

    • Standard Flat & Pitched Skylights: 3–6 working days.
    • Custom Sizes: 3–6 weeks for production and shipping (free delivery).
    • Roof Lanterns, Framed Skylights, Electric Opening Skylights, Walk-On Skylights, Skylight Blinds: 10–14 working days.
    • Glass Balustrades & Juliet Balconies: 4-8 weeks (after approval of detailed drawing)

    Delivery Arrangements:

    • Delivery is scheduled Monday to Friday, 8 am to 5 pm.
    • We’ll contact you to arrange a delivery time once payment is complete.

    Shipping Options:

    • Enter your shipping address at checkout to view options.
    • Within M25: Our drivers ensure safe delivery. We ask that you or your builders are present to accept the order.
    • Outside M25: We use external couriers. They will contact you to schedule delivery.
    • Extra Economy Shipping: Available for all areas except Northern Ireland and Scotland. In rare cases, you may need to pick up your order from a nearby depot.

    Important Notes:

    • Products range from 10kg to 280kg. You may need 2–6 people to assist with unloading.
    • We are not liable for any damage during unloading, as it’s the customer’s responsibility.
    • If no one is available to receive the delivery, we will try to contact you. If unreachable, the order will be returned to our warehouse.
    INSTALLATION GUIDE

    Step-by-step Installation Guide

    Over the years, we've observed numerous errors and poor practices in skylight installations that have led to persistent issues. To help you avoid these pitfalls, we're eager to share our accumulated expertise and knowledge. We highly recommend checking our detailed installation materials to ensure you apply the best practices for a flawless and durable installation.

     

    Structural opening – provided By builder

    When selecting sizes for our Skylights, please note that the listed dimensions correspond to the bottom (internal) glass panel. Each skylight's top panel extends an additional 100mm on each side, making the overall externally visible size 200mm larger in both width and length. This design ensures a robust, weather-resistant seal while maximizing the internal visibility and light entry of your skylight installation.

     

    Manual Handling
    Installation Guide
    Installation on Flat Roofs
    Installation on Pitched Roofs

    Why Professionals Trust Our Upstands

    insulated-osb-upstand-for-pitched-roof-gallery-image-1
    insulated-osb-upstand-for-pitched-roof-drawing
    insulated-osb-upstand-for-pitched-roof

    No Water Build-Up

    Built-in 6° slope ensures water runs off effortlessly

    Thermal Protection

    40mm insulation core with 15mm OSB for maximum efficiency

    Quick & Accurate Installation

    Tailored in advance to pair perfectly with your Saris-Extensions skylight

    saris-extensions-direct-skylight-manufacturer
    ukca-certified-skylights-saris-extensions
    installation-services-saris-extensions
    easy-skylight-installation-saris-extensions
    uv-protected-skylight-saris-extensions

    Tailored to Your Home: Custom-Sized Skylight Solutions

    If our standard stock sizes don't quite match your project’s requirements, there is no need to worry—we have the perfect solution.

    At Saris Extensions, we specialize in providing high-quality, bespoke skylights designed to fit your specific architectural needs. Simply use our online custom size calculator to insert your opening dimensions and receive an instant, transparent quote. From precision engineering to your doorstep, we make it easier than ever to receive and fit a skylight that is perfectly scaled for your space.

    Bespoke Skylight Calculators
    Bespoke Skylight Calculators

    Before & After

    See the remarkable difference with a Saris-Extensions skylight.

    • Modern, frameless elegance

    •  Exceptional insulation and UV defense

    • U Value: 0.9 W/m²K — superior thermal performance

    One simple change. A world of transformation.

    Choose Saris-Extensions.

    Frequently Asked Questions

    Are these rooflights energy efficient?

    Yes. Our triple-glazed models deliver U-values as low as 0.9 W/m²K, helping to reduce heat loss, lower energy bills, and comply with Part L Building Regulations.

    Is the skylight safe and shatter-resistant?

    Absolutely. Every unit uses toughened outer glass and laminated inner glass, ensuring excellent durability and meeting all relevant UK and EU safety standards (EN12150 / EN14449).

    Will this rooflight work with my roof type?

    Yes. Designed for versatility, our rooflights fit pitched roofs between 6° and 45°, and are fully compatible with both tile and slate roofing materials. We also offer options for flat roofs.

    Can this skylight be installed on any roof construction?

    Yes. Whether your roof is warm or cold constructed, our skylights are suitable and designed for flexible installation.

    Is the skylight guaranteed leak-proof?

    Yes — when installed using our official flashing kit and following the provided instructions, the unit is fully watertight and weather-sealed.

    Do the rooflights come with self-cleaning glass?

    Yes. All models include self-cleaning glass as standard, helping to reduce dirt accumulation and maintain clear views with minimal maintenance.

    What’s included when I purchase a skylight?

    Each product comes with the glazed skylight unit and installation instructions. Optional items such as flashing kits, upstands, and blinds are available to order separately.

    Can I order custom-sized rooflights?

    Yes. We offer a full made-to-measure service, allowing you to order rooflights tailored to your exact dimensions. Contact us to request a custom quote.

    How fast is delivery?

    Standard sizes are dispatched within 5–10 working days. Custom and made-to-measure orders typically take 3–5 weeks. All orders are shipped via tracked and insured delivery

    What warranty is included?

    Our rooflights are backed by a robust 20-year glazing guarantee, giving you complete confidence and long-term protection.

    Reviews

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    6 reviews
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    6 reviews for 1200 x 1200 mm Skylight, Pitched Roof, Triple Glazed, Frameless, 72.60kg, UV 0.9

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    1. George Jones –

      Saris Extension’s skylights are unbeatable in terms of design and quality. They’re a pleasure to install and my clients always comment on how great they look and perform.

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    2. Chloe Salliss –

      Excellent customer service and quality of windows. We ordered two 1500 by 1500 windows. Would definitely recommend.

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    3. James Parker –

      Top-quality skylights with speedy delivery. The customer service was excellent. Loved the variety of sizes available. Our kitchen has never looked better with all the natural light!

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    4. James Parket –

      Top-quality skylights with speedy delivery. The customer service was excellent. Loved the variety of sizes available. Our kitchen has never looked better with all the natural light!

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    5. Henry Carter –

      Excellent skylights, quick delivery, and great customer service. The wide range of sizes was really helpful. Our hallway has been completely transformed with the new skylight!

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    6. Clara Monmouth –

      Customer service was brilliant and the roof window fits perfectly.

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