Aluminium Framed Rooflight – Triple Glazed – 800 x 800 mm
Aluminium Framed Rooflight – Triple Glazed – 800 x 800 mm Original price was: £ 1.310.00.Current price is: £ 605.00. incl. VAT
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KingsView 400x400mm Rooflight | Flat Roof Skylight | Frameless Triple Glazed | 0.9 U-Value
KingsView 400x400mm Rooflight | Flat Roof Skylight | Frameless Triple Glazed | 0.9 U-Value Original price was: £ 274.00.Current price is: £ 129.00. incl. VAT

KingsView 300x300mm Rooflight | Flat Roof Skylight | Frameless Triple Glazed | 0.9 U-Value

(10 customer reviews)

Original price was: £ 185.00.Current price is: £ 79.00. incl. VAT

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LIVE STATUS: 1 units remaining

KingsView 300x300mm Frameless Flat Roof Skylight – A compact, premium 0.3m x 0.3m Triple Glazed unit designed to flood smaller spaces like bathrooms and hallways with natural light. Featuring an industry-leading 0.9 W/m²K U-Value, this energy-efficient rooflight provides maximum insulation and a 100% leakproof seal.

Professional Build Quality: Part of our high-performance KingsView series, this unit uses 6mm thermally toughened and laminated safety glass. Unlike cheaper alternatives, our reinforced design prevents water pooling and sagging, ensuring long-term structural integrity and safety.

  • Internal Size: 300 x 300 mm (0.3m x 0.3m)
  • Glazing Spec: Triple Glazed (Toughened & Laminated Safety Glass)
  • Performance: 0.9 W/m²K U-Value & 39dB Sound Reduction
  • Maintenance: Sunlight-activated Self-Cleaning coating included
  • Compliance: UKCA Certified & Building Regs Compliant
  • Delivery: Next-day UK shipping available direct from the manufacturer

The ideal solution for brightening small interiors with a sleek, frameless “glass-to-sky” aesthetic. Trusted by UK builders for superior strength and easy installation.

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

1 in stock (can be backordered)

Inclined Insulated Upstand for Flat Roof Skylight 300 x 300 mm
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Original price was: £ 67.68.Current price is: £ 56.40. incl. VAT
Installation kit for 1 x Flat Roof Skylight 300x300mm
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£ 40.15 incl. VAT
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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£ 16.15 incl. VAT
Self-Cleaning Liquid Smart Glass Bottle 15ml
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£ 30.00 incl. VAT
Arrives for your Project: 25th Feb – 3rd Mar
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ACTIVE PROMOTION

Use Code: TODAYONLY

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

How it Works?

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. 
skylights-co-uk-logo-final

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

  • Top Pane: 6 mm Planibel Clearlite / Thermally toughened glass BS EN 12150
  • Middle Pane: 6 mm iplus Thermally toughened glass with Low-E coating EN 12150
  • Bottom Pane: Stratobel Clearlite 44.2 / Laminated glass EN 14449

Premium Flat Roof Skylights

Are you thinking of adding a skylight but worried about heat loss? Our Flat Roof Skylight in 300 x 300 mm boasts an impressive U-value of 0.9 W/m²K, thanks to its triple-glazed units and warm edge spacer technology. That means superior insulation, keeping your space cosy in winter and pleasantly cool in summer—all while enjoying tons of natural light!

Why Choose Our Frameless Flat Roof Windows

  • Energy Efficiency: Triple-glazed units and warm edge spacer technology offer outstanding thermal performance, translating to a U-value of 0.9 W/m²K, keeping your space comfortable year-round and reducing energy bills.
  • Unobstructed Views: The frameless design maximizes natural light penetration, offering breathtaking panoramic sky views.
  • Self-Cleaning Convenience: Effortless maintenance with a sunlight-activated self-cleaning feature that keeps the glass spotless.
  • Versatile Installation: It is suitable for flat roofs with 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.
  • 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.

Essential Skylight Accessories

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

  • Installation Kit for 1 x Flat Roof Skylight 300x300mm: This complete kit includes everything you need for a secure and stress-free installation. It 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): This high-quality tape is a double threat during installation. It provides effective sealing to keep the elements at bay and crucial support for a secure fit.
  • Weatherproofing Sealant (Silicon)—DOWSIL™ 791, 310ml: This durable sealant is the key to a watertight seal around your skylight. It 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 replenishes the skylight’s self-cleaning properties, ensuring effortless maintenance and sparkling glass with minimal effort.

Choose Skylights.co.uk

We offer a variety of standard sizes readily available for purchase, along with custom skylights to suit your specific needs.

No matter the project, our flat roof lights provide:

  • Exceptional Thermal Performance: Enjoy outstanding energy efficiency thanks to innovative features like triple glazing, keeping your space comfortable year-round.
  • Natural Light Abundance: Bathe your space in beautiful natural light with our skylights, creating a brighter and more inviting atmosphere.
  • Elegant Design: Add a touch of sophistication to any setting with our sleek and modern flat roof lights.

Download our entire 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 300 x 300 mm Flat Roof Lights Near Me

Looking for a 300 x 300 mm flat skylight near you? Also known as a 0.3 x 0.3 m  roof light, this compact and modern solution is perfect for brightening up smaller spaces. We manufacture sleek, frameless roof lights designed for easy installation, maximum performance, and long-lasting durability.

As a trusted UK manufacturer, we provide:

Next-day delivery across the UK

Custom sizes and bespoke roof light options

Direct-from-manufacturer pricing

Trade support and volume discounts

Full UKCA certification for compliance and peace of mind

Whether you need fast-shipping stock or tailored solutions, our high-performance flat roof lights are built to meet the demands of builders, architects, and homeowners alike. We deliver nationwide, so you can order online and receive premium-quality roof lights—wherever your project is located.

Weight 6.45 kg
Dimensions 55 × 10 × 55 cm
Brand

KingsView

Internal Size

300 x 300 mm

External Size

500 x 500 mm

Glazing Type

Glass Tint

Self-Cleaning:

Yes

Roof Type

Flat Roof

,

Pitched Roof

Skylight Type

Frameless

Top Glass Pane:

6 mm Planibel Clearlite / Thermally toughened glass EN 12150

Air Gap

16 mm Argon 90%

Middle Glass Pane:

4 mm Planibel Clearlite / Thermally toughened glass

Air Gap

16 mm Argon 90%

Bottom Glass Pane:

Stratobel Clearlite 44.2 iplus 1.1 pos.5 / Laminated glass with Low-E coating EN 14449

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

Label

Clearance

10 reviews for KingsView 300x300mm Rooflight | Flat Roof Skylight | Frameless Triple Glazed | 0.9 U-Value

  1. Harry William

    I bought a small attic skylight and it has transformed my space. The natural light it brings in has turned a previously unused space into my favorite spot in the house. Huge thanks to KINGSVIEW for the fast shipping to Manchester and the great service!

  2. Olivia Scott

    The small skylight in our bathroom has made a huge difference. KingsView Glass products are top-notch.

  3. Ella Jackson

    Installed a small skylight in our bathroom. It’s very good and adds nice light.

  4. Megan Roan

    The flat roof windows have completely transformed our bedroom. The room is now flooded with natural light, and we’re so happy with the quality.

  5. Orla McCarthy

    Our frameless roof window has transformed the attic. It’s sleek and modern, and the amount of light it brings in has made the space so much more livable.

  6. Liam Sullivan

    Really pleased with the fixed roof window we ordered. It’s modern, stylish, and brings in a ton of natural light. Delivery was prompt.

  7. Carys Davies

    The frameless roof window has made our living room feel so much brighter and more open. Fast delivery, and the customer service was fantastic!

  8. Charlotte Blake

    Fast delivery and excellent technical support. The skylight has made our kitchen so much brighter!

  9. Siobhan Gallagher

    The fixed roof window we installed in our home office has made a huge difference. The natural light is amazing, and the installation was easy.

  10. Oliver Haines

    We installed the skylight in our loft, and the difference is incredible. It feels so much more open now. The delivery was faster than expected, and the product quality is brilliant.

Add a review

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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].

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

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

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

Original price was: £ 185.00.Current price is: £ 73.47. incl. VAT
Original price was: £ 67.68.Current price is: £ 52.45. incl. VAT
£ 40.15 incl. VAT
Original price was: £ 291.68.Current price is: £ 164.92. 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

10 reviews for KingsView 300x300mm Rooflight | Flat Roof Skylight | Frameless Triple Glazed | 0.9 U-Value

  1. Harry William

    I bought a small attic skylight and it has transformed my space. The natural light it brings in has turned a previously unused space into my favorite spot in the house. Huge thanks to KINGSVIEW for the fast shipping to Manchester and the great service!

  2. Olivia Scott

    The small skylight in our bathroom has made a huge difference. KingsView Glass products are top-notch.

  3. Ella Jackson

    Installed a small skylight in our bathroom. It’s very good and adds nice light.

  4. Megan Roan

    The flat roof windows have completely transformed our bedroom. The room is now flooded with natural light, and we’re so happy with the quality.

  5. Orla McCarthy

    Our frameless roof window has transformed the attic. It’s sleek and modern, and the amount of light it brings in has made the space so much more livable.

  6. Liam Sullivan

    Really pleased with the fixed roof window we ordered. It’s modern, stylish, and brings in a ton of natural light. Delivery was prompt.

  7. Carys Davies

    The frameless roof window has made our living room feel so much brighter and more open. Fast delivery, and the customer service was fantastic!

  8. Charlotte Blake

    Fast delivery and excellent technical support. The skylight has made our kitchen so much brighter!

  9. Siobhan Gallagher

    The fixed roof window we installed in our home office has made a huge difference. The natural light is amazing, and the installation was easy.

  10. Oliver Haines

    We installed the skylight in our loft, and the difference is incredible. It feels so much more open now. The delivery was faster than expected, and the product quality is brilliant.

Add a review

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