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Your Velux Windows Expert in Clapham Junction

Certified Installers Limited specialises in installing, replacing, and repairing Velux windows, sun tunnels, rooflights and flat roof windows for residential and commercial properties throughout the Clapham Junction area.

20 Years


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Velux Window & Glazing Specialists in Clapham Junction

Certified Installers Limited specialise in installing, replacing, and repairing Velux windows, sun tunnels, and flat roof windows for residential and commercial properties throughout the Clapham Junction area.

Drawing on over 20 years of experience, we are Clapham Junction's most trusted Velux window installation and repair company. We are able to discuss any issues you may have with your current installation and advise you on the most cost-effective solution, please do not hesitate to email us or telephone us for a free survey or quote.

VELUX roof windows create aesthetically pleasing, light-filled rooms.

We offer stylish blinds tailored to your personal taste and needs.

We replace old Windows with Superior quality long-lasting insulated products.

We offer a variety of styles and types of glass to fit any window in your home.

VELUX INTEGRA® is the finest in windows, blinds and shutter technology.

Repair and Maintenance of Velux Windows by our specialised staff.

What makes us different 

Certified Installers Limited has specialised in new Velux Installs, Velux repairs and Velux maintenance for a wide range of customers in the Clapham Junction area.

Our skilled team have the training and experience to ensure we complete all our repair work to the highest standards. All ranges of work are undertaken, from residential Velux Installations, Velux glass replacement, Velux Replacements and Velux repairs to large projects like industrial and commercial skylight Installs, skylight repairs, rooflight replacements and roof light maintenance.

What our Customers say 

Excellent service

“I would highly recommend Certified installers. I had a Velux fitted in a rural location in the Scottish highlands, excellent service and very happy”

Jess Mackinnon

They go the extra mile

“Had an issue with the weather for the last couple of appointments, which obviously can't be helped, the lads came today on thier day off and completed my new Velux as my old one was leaking really bad.
Really appreciate people going the extra mile”


Free Quotes & Estimates

Please feel free to contact us anytime on 0800 368 2988, we are always happy to call round to give you a free quote on any project you may have for us.


We have many satisfied customers throughout the UK and we regularly complete major contracts across the whole of the UK.

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Clapham Junction

Clapham Junction is a bustling area in Greater London, famous for its major railway station and vibrant atmosphere. The area is a hub of activity, with numerous shops, restaurants, and entertainment venues. Clapham Junction offers excellent transport links, making it a convenient and popular location for both residents and commuters.

Certified Installers Limited:
In Clapham Junction, Greater London, Certified Installers Limited offers expert Velux Windows services. As a FENSA certified company, we ensure exceptional workmanship and compliance with all necessary regulations. Our services include Velux Window Installation, Velux Window Replacement, and Velux Window Repairs. We specialise in Velux Installation, Velux Replacement, and Velux Repair, delivering superior service for all your window needs. For Velux Glass Replacement or Velux Blinds, our skilled team is ready to help. We offer Velux Automatic Modifications for added convenience, alongside Skylight Repairs, Skylight Installs, and Skylight Replacement. Our expertise also covers rooflight window installations, roofing, and Solar Panel Installation. Additionally, we provide pet-friendly solutions such as Dog Flap Install, Cat Flap Install, and Pet Flap Install. Our comprehensive offerings include window and door installation, and window and door replacement, ensuring your home remains both visually pleasing and functional.

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