Flat Roof Window/Skylight 300 x 300 mm

At Skylights One LTD, we strive to design and manufacture the highest-quality roof windows in the industry.

Our premium non-opening frameless skylights are triple glazed with 6mm toughened, self-cleaning glass, a U Value of only 0.9 W/m²K., and a clear tint that lets you enjoy the beautiful true colors of the sky from your home.

The Flat Roof Window Skylight 300 x 300 mm has an internal quoted glass size of 300 x 300 mm, and an external glass size of 500 x 500 mm. Perfect for those who want to open up their living space, with an easy-to-install and cost-effective skylight. No more cold drafts, this high-performing skylight, filters down the heat and brings natural light to your home, making it a better place to live.

Installation Schemа

Welcome To The Future Of Architecture

Look no further. Skylights1 specialists are here to help, with the highest quality skylights and a frameless design that will make your space feel twice as big. With over 25 years of knowledge in the construction industry, working closely with the architect community, our team can help provide the required technical guidance throughout the entire journey of the project!

Imagine a Better World

Founded on a vision of daylight, privacy and quality of life, Skylights1 offers a complete range of high-quality skylights, roof lanterns, flashings and installation products.

Enjoy the natural light and a warm atmosphere in your home.

Enhance the quality of life with increased natural lighting in dark areas

Increase your privacy and save money with our energy efficient products.

Improve the aesthetics of your home with our wide range of roof windows

Create a better design that reflects your taste, personality and lifestyle.

Enhance the beauty of your home, make it smart, modern, and sophisticated.

  • Enjoy the natural light and a warm atmosphere in your home.
  • Increase your privacy and save money with our energy efficient products.
  • Create a better design that reflects your taste, personality and lifestyle.
  • Enhance the quality of life with increased natural lighting in dark areas
  • Improve the aesthetics of your home with our wide range of roof windows
  • Enhance the beauty of your home, make it smart, modern, and sophisticated.
For increased light and increased security

Triple Glazed Skylights

Skylights are wonderful for getting additional natural light into your home. They are also great for increasing energy efficiency by maximizing the amount of natural light that you let into your home and taking advantage of it during the day. Triple glazed skylights take this to the next level by providing a triple layer of glass, and Low-E film to ensure that your rooms are beautifully lit. They provide three layers of protection to keep your family safe and cool, which is something that any homeowner should be able to get behind.

Superior insulation

Even if your less into design and more into content

Reduce noise

Even if your less into design and more into content

Keep interior cooler in summer

Even if your less into design and more into content

Increase energy efficiency

Even if your less into design and more into content

Enhanced security

Even if your less into design and more into content

Reduced harmful UV radiation

Even if your less into design and more into content

Save energy and money

What’s better than adding functionality to your home? Saving money, of course! Skylights are the perfect solution for bringing natural light into your home, which can reduce energy costs.

Great for savings in electricity consumption and increasing the value of your home!

Skylight installation factors

Skylight Installation

Skylights One Ltd skylights are a lot more than just roof windows. They are some of the most beautiful, energy-saving, and innovative skylights on the market. And now, you can install them yourself with our handy installation guide, no matter what size your opening is!

FAST UK SHIPPING

Skylights on Stock

Next Day Delivery for the London area (M25) or Free of charge 3-6 working days. We ship nationwide.

LOW PRICES

Best Value For Everyone

Our low pricing means that you can order at competitive prices, whether you are a trade or not.

20 YEARS WARRANTY

Top Product Quality

Our premium triple glazed skylights come with a 20 year warranty.  You’ll never have to worry about the quality again.

SECURE PAYMENT

Safe payment methods

We offer online payment methods we think are the most secure.

CUSTOMER SUPPORT

We’re here to help

Discuss your specific needs and get answers to all of your questions

Frequently Asked Questions

What guarantees and warranties do you offer?
We offer a 20 year seal warranty on all our skylights.
How can I get a price?
All our prices are online. Discounts may apply if you have been given a brochure with a discount code and payments can be made through our secure payment methods.
How quickly can I get my order delivered?
As long as we have it in stock you will receive your order within 3 to 6 working days from when your order has been placed, unless you are located within the M25 London area-then you have 2 delivery options (economy and express delivery) at the checkout. If it is not in stock, please do not hesitate to contact us as our stock is updated weekly.
Can I collect from you?
Yes you are more than welcome once you have made payment please do not hesitate to contact us via phone or email so we can arrange someone to prepare this for you.
What pitch should my flat-roof skylight be?
It is important to have your skylight installed at a slight angle relative to the horizon to allow water to run off the glass and avoid pooling. We recommend setting the rooflight at an angle of 45°. It is worth it to spend a few extra minutes before applying the silicone to run a water test.
What makes us different from the rest of the market?
Skylights1.co.uk guarantees in supplying top quality products at the Best Price, due to manufacturing and delivering everything in house.
Double or Triple Glazed?
Triple Glazed skylights tend to have a better U-Value and Noise Resistance.

What this means is that a triple glazed skylight will have better noise reduction properties if you live in a noisy area.

The lower U-Value benefit of them is that they have less heat loss. So if you plan on having a larger skylight or more than one skylight on your extension letting in more natural light we would recommend going for triple as it will save you on your energy bills and loose less heat.

Double Glazed Skylights tend to be lighter in weight easier for installations however they are not as good on heat loss and noise reduction as triple.

Then again most houses still have double-glazed windows.

Get answers to all your questions you might have.

Have you made your choice or are you still hesitating between different types of roof windows? If you are looking for custom design solution, Skylights1 can make custom size skylights that vary from our standard sizes and suit your required dimensions.

And if you have any questions or it’s hard for you to find the one that suits your needs. Do not hesitate to Contact us today for a free consultation!