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Product categories

Browse our product categories to explore our extensive offer of window, door and conservatory systems. From the best-selling Global conservatory roof to the market-leading WarmCore warm aluminium windows and doors, our products are designed to offer exceptional performance while offering you ease of fabrication and installation to cater for every project.

Discover our know-how

Across six UK-based manufacturing sites, our 1000+ team is a network of experts in window, door and conservatory system manufacturing. Incorporating PVC-U and aluminium systems, our very own glass division and an extensive 100+ fleet of vehicles, our mission is to deliver quality products directly to you, on time and in full every time.

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Choose your sector

We work directly with a wide range of sectors to provide quality products for homeowner renovations, large scale commercial contracts and new build housing projects. We’re invested in supporting every stage of the product journey with a team of technical experts on-hand to support fabricators and installers, along with in-house support for advising on product specification requirements for architectural projects.


Latest news & announcements

Find out the latest news from across the Aperture Group including recent product launches, new appointments and company acquisitions.

New WarmCore homes achieve Home Quality Mark

A new build development featuring WarmCore windows and doors in Bricket Wood, Hertfordshire, has been awarded a Home Quality Mark by the BRE. Read more


Quicker roof solutions with Global pelmet

The Global conservatory roof has remained one of the best known systems for over 10 years. Now, with the addition of a variable pelmet, which creates a quick and easy internal orangery solution, we find out why it’s still a top choice for installers and fabricators Read more


Screen time for WarmCore and Global products

WarmCore windows and doors have been installed on one of George Clarke’s Old House, New Home projects, aired on Channel 4 in August. Read more


Our brands

You’ll find fabricators and installers up and down the country using our market-leading brands, including WarmCore, Calibre Doors, Global and Stratus. With one of the widest product ranges available, we’re certain there’s a brand collection suitable for every project. Find out more about each of our brands, discover new product ranges and download useful information including technical specifications and retail brochures.