- North Wales, Cheshire, Wirral & surrounding areas
Velux & Keylight roof window installations — natural light, beautifully integrated.
Transform your loft, kitchen or extension with professionally installed roof windows from Onyx Roofing. As Velux Approved Installers, we supply and fit genuine Velux roof windows alongside high-quality equivalent options, ensuring every installation is completed to the highest standard. From expert advice and precise fitting to flashings, blinds and electric upgrades, we’ll help you create a brighter, more comfortable living space.
Every roof window installation is carefully planned to ensure a perfect fit, outstanding weather protection and a seamless finish that complements your roof. As approved VELUX installers, we use manufacturer-approved installation methods and high-quality flashing systems to maximise performance, minimise heat loss and provide complete peace of mind for homeowners across North Wales, Cheshire and The Wirral.
Installing roof windows is one of the most effective ways to transform dark lofts, attic conversions, kitchens and home extensions into bright, welcoming spaces. At Onyx Roofing, we specialise in professional roof window installation throughout North Wales, Cheshire and The Wirral, fitting premium VELUX roof windows alongside high-quality equivalent systems to suit every property and budget.
Whether you’re replacing an old roof window or installing a completely new opening, every project is completed with precision and attention to detail. We carefully assess your roof structure, recommend the most suitable window size and positioning, and ensure every installation is fully weatherproof with manufacturer-approved flashing kits for maximum performance and longevity.
Our experienced team works with both tiled and slate roofs, delivering clean installations that improve natural daylight, ventilation and energy efficiency while enhancing the appearance and value of your home.
We pride ourselves on the quality of our work – We have 130+ reviews on Yell, 90+ on Mybuilder & many more across Google, Facebook and other platforms. Take a look at some of our reviews, visit our online profiles & if you would like to arrange a free no-obligation quotation, please contact us.
Transform dark spaces into bright, inviting rooms.
Correct flashing and detailing — guaranteed leak-free.
Adds light, ventilation and resale value to your home.
Slate, tile and traditional pitched roof installations.
Modern flat roofing systems built to last 50+ years.
Fascias, soffits, guttering & cladding.
From small leaks to large repair works and emergency call outs.
Warm roof conversions that add value and life to your home.
Most standard roof window installations can be completed within a single day. More complex installations, multiple windows or projects requiring internal finishing may take longer. We'll always provide a clear timescale before work begins and aim to complete every installation efficiently while maintaining the highest standards of workmanship.
In most cases, roof windows do not require planning permission. However, if your property is listed, located in a conservation area, or the installation forms part of a larger renovation, additional permissions may be required. We'll be happy to advise you based on your property and project.
Yes. We regularly replace old, damaged or inefficient roof windows with modern VELUX and Keylite roof windows. Whether your existing window is leaking, difficult to operate or simply outdated, we can install a like-for-like replacement or upgrade it to a larger, more energy-efficient model with minimal disruption.
A properly installed roof window should not leak. Most leaks are caused by incorrect installation, worn seals or damaged flashing rather than the window itself. As approved VELUX installers, we use the correct flashing kits and manufacturer-approved installation methods to ensure a watertight, long-lasting finish.
Get a free, no-obligation quote from our specialist team today.