With the distinct advantage of slimmer sightlines and a durable powder coated finish (that will never need to be re-coated), our bifolding doors can be installed with between two and seven panels, making them ideal for every application – from buildings where space is restricted, to larger openings that are synonymous with commercial establishments.


You can enjoy an abundance of natural light and create a modern ambience within your home, whatever the décor, thanks to the wide range of contemporary colours that are available.


Creating a seamless transition into the garden area, a whole wall of glazed panels can be opened up when aluminium bifold doors are folded along a track. A popular alternative to French doors or patio doors, they provide unparalleled views of the garden and bestow the feeling of extra space.


Supreme thermal performance and slim sight lines set the Alutech bi-fold door apart from the competition. Harnessing engineering excellence, the BF 73 bi-folding door will open and close effortlessly every time.

Suitable for residential or commercial purposes, it is designed for the aesthetic and insulation requirements of a home, but with the outstanding durability and reliability required by a commercial application – all this comes without a hefty price tag!


  • 120kg per door leaf – providing for the largest openings
  • Panels of up to 3000mm high and up to 1200mm wide, without having
    to upgrade rolling hardware
  • Above ground bottom rollers
  • Engineering grade running rollers for a smooth and silky opening and
    closing operation
  • Thermal properties of down to 1.4 U W/m2K
  • Sightline 120mm or 133mm for maximum vision
  • PAS 24 security rated
  • Tested to BS6375 Part 1: 2009
  • Available in RAL colour of your choice


Designed entirely in-house, the WarmCore system is packed full of engineering features that are revolutionising the fenestration industry.


Everything about Warmcore is smooth & sleek, from the slim sightlines to stylish sash options


Designed to offer superior thermal performance in the aluminium market, with U-values as low as 1.0.


Warmcore windows & doors come with a 10-year guarantee as standard, so you know your products will stand the test of time


Our range of Bi-Fold and Patio doors you can bring to life any property with the Warmcore range


WarmCore folding sliding doors come in a range of configurations to ensure the final product meets everyday needs.


WarmCore has been designed from the ground up by the experts at Aperture Group and is the epitome of British Engineering