25 / January

FAQ: What is a Composite Window?

With the ever developing market for better aesthetics and increased performance, a new breed of window and door product is emerging. Commonly referred to as ‘composite windows and doors’ these products offer a refreshing alternative to conventional uPVC.

What are composite windows made of?

‘Composite’ is a descriptive term referring to something made up of a combination of materials but can be confusing as it can fall in to two categories:

The first is a composite uPVC product which would be grained or timber alternative such as Evolution. The window frame is uPVC wrapped with a grained wood-looking material also known as ‘foil’. These are conventional window systems in their operation providing opening out casement windows in both lipped or flush design. There are also similar options within our other uPVC ranges such as Halo or Modus who also offer grained frames with a variety of casement options.

The second type of composite window would be an aluminium clad (sometimes referred to as ali-clad or alu-clad) frame with either a uPVC or timber interior frame. They are typically tilt & turn windows and doors and offer the opportunity to achieve ultra-low u-values (known as Passivhaus or Passive House) performance levels. The leading brand of this type is Austrian manufacturer, Internorm. These product ranges offer Entrance Doors, Lift & Slide Doors and Opening Out Casement Windows & French Doors.

What materials are used in composite doors?

There are also composite front doors – again made from a combination of materials:

With the first type, the outer skin on both the interior and exterior sides is a fibreglass skin fixed onto a water resistant composite material which is surrounded by a high density, high insulation foam core, the main structure of the door known as the ‘door leaf’ is either steel reinforced fibreglass or steel reinforced uPVC.

The second type would be an aluminium clad (ali-clad or alu-clad) frame with either a uPVC or timber interior frame.

Want to know more?

If you want to know more about the individual products mentioned above then feel free to download one of our brochures.

Alternatively, if you’d like to discuss your project requirements, please call us or request a quotation.

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