A good bi-fold door can change how you use a room, opening a kitchen or living space straight out onto the garden. At AK uPVC Solutions, we supply Cortizo aluminium bi-fold doors, built with a thermal break for enclosing large gaps with a genuinely contemporary look. Whether you’re planning a garden opening in Buckingham or a kitchen extension in Bicester, Brackley or Aylesbury, our bi-fold doors are made to measure, with a low, accessible threshold and strong thermal and weather performance built in.
Wide Opening Spaces
Excellent Thermal Performance
Weatherproof & Secure
Our Cortizo bi-fold doors are built to open up a room without compromising on warmth, weatherproofing or security.
Built with a thermal break as standard, our Cortizo bi-fold doors achieve window transmittance values from as low as 1.1 W/m²K, helping to keep your home warm and your energy bills in check.
Tested to Class 9A watertightness, our bi-fold doors withstand 330 litres of water and wind speeds of 114 km/h over 55 minutes with no water intake, along with Class 4 air permeability for a genuinely draught-free fit.
Our Cortizo bi-fold doors have achieved the PAS24 security test, so you don’t have to choose between a wide opening and a secure home.
Choose from configurations of up to 14 sashes, opening inward or outward, with the option of a corner sash at 90° with no mullion for an uninterrupted view. Finishes are available across the full RAL colour range, in powder coating, anodised and wood-effect finishes, including two-colour options so the inside and outside can be different colours entirely.
At AK uPVC Solutions, we are a family-run business based in Buckingham, dedicated to fitting bi-fold doors with care, honest advice and workmanship you can rely on.
Frequently Asked Questions
Bi-fold doors are made up of several glazed panels, hinged together, which fold back and stack neatly to one side of the opening. This gives you a wide, uninterrupted opening between your home and garden, with up to 14 sashes available in our Cortizo range.
Pricing varies based on your specific requirements, such as the number of sashes, size, finish and glazing. As we provide made-to-measure solutions, we offer free, no-obligation quotations to give you an accurate price for your project.
Yes. Our Cortizo bi-fold doors have achieved the PAS24 security test, so you can enjoy that wide opening without giving up on how secure your home is.
The main difference is how they open. Bi-fold doors fold back concertina-style and stack to one side, giving you the widest possible opening. Sliding doors run along a track, so one panel always stays fixed in place and part of the opening remains covered.
Our Cortizo bi-fold doors are built with a thermal break as standard, achieving window transmittance values from as low as 1.1 W/m²K. This helps to keep your home warm and your energy bills down, even with a large expanse of glazing.