Inclined Insulated Upstand for Flat Roof Skylight 400 x 3000 mm
Inclined Insulated Upstand for Flat Roof Skylight 400 x 3000 mm Original price was: £ 304.00.Current price is: £ 243.20. incl. VAT
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Juliet Balcony System with Glass Adapters 1200 х 1100 mm
Juliet Balcony System with Glass Adapters 1200 х 1100 mm Original price was: £ 410.00.Current price is: £ 330.00. incl. VAT

Fixed Skylight, Frameless Triple Glazed Rooflight

Price range: £ 120.00 through £ 2.279.00 incl. VAT

Choose Your Skylight Size:

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Type: Fixed Frameless Flat Roof Skylight
Glazing Type: Triple Glazed
U Value: 0.9 W/m²K
G Value: 58%
Light transmittance: τv [%] 72
Sound reduction (EN 12758): 39dB
UV transmission : τuv [%] 0

 

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Light transmittance: tv [%]72%
External light reflection: pv [%]17%
Internal light reflection: pvi [%]17%
Colour rendering index: Ra [%]97%
Total solar energy transmittance: g [%] 57%
Shading coefficient: SC 0.66
UV transmission: τuv [%] 0%
Selectivity: 1.26
U value: 0.9 W/(m².K)
Sound reduction – EN 12758 [dB] 39 (-2;-7)

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. 
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Description

Our Fixed 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, compliant with BS EN 12150
  • Middle Pane: 4 mm Planibel Clearlite / Thermally toughened glass, compliant with BS EN 12150
  • Bottom Pane: Stratobel Clearlite 44.2 iplus 1.1 / Laminated glass with Low-E coating, compliant with EN 14449

 

Triple-glazed Roof Windows

Are you thinking of adding a skylight but worried about heat loss? Our Roof Windows boast 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 Skylights

  • 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:

  • 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!

Additional information
Weight 6.45 kg
Dimensions 55 × 10 × 55 cm
Internal Size

300 x 300 mm

,

400 x 400 mm

,

400 x 1500 mm

,

400 x 2000 mm

,

400 x 3000 mm

,

500 x 500 mm

,

500 x 1500 mm

,

500 x 3000 mm

,

600 x 600 mm

,

600 x 900 mm

,

600 x 1200 mm

,

600 x 1500 mm

,

600 x 1800 mm

,

600 x 2000mm

,

600 x 2500 mm

,

600 x 3000 mm

,

800 x 800 mm

,

800 x 1000 mm

,

800 x 1200 mm

,

800 x 1500 mm

,

800 x 1800 mm

,

800 x 2000 mm

,

800 x 2500 mm

,

1000 x 1000 mm

,

1000 x 1200 mm

,

1000 x 1500 mm

,

1000 x 2000 mm

,

1000 x 2500 mm

,

1000 x 3000 mm

,

1200 x 1200 mm

,

1200 x 1800 mm

,

1200 x 2000 mm

,

1200 x 2500 mm

,

1500 x 1500 mm

,

1500 x 2000 mm

,

1500 x 2500 mm

,

1500 x 3000 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

Before and After

See how a space is completely transformed with our skylights.

  • Maximum daylight
  • Modern minimalist design
  • Superior thermal insulation (U-value as low as 0.9 W/m²K)
  • UV protection to preserve interiors
  • Excellent noise reduction for a quieter home
  • Toughened & laminated glass for enhanced safety
  • Low-maintenance self-cleaning glass

One change. Total transformation. 

Reasons to Choose Skylights.co.uk?

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%

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.

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.

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