Bifold Doors

Self-cleaning glass combines self-cleaning and solar control properties, making it an excellent choice for homeowners who want low-maintenance glazing.

A special coating applied to the glass breaks down organic dirt, reducing the ability of other dirt particles to stick to the surface. When it rains, water spreads evenly across the glass rather than forming droplets. This thin sheet of water then washes away the loosened dirt as it runs off. The result is cleaner glass with less maintenance and visibly clearer views

A U-value measures how well a material prevents heat from escaping. It represents the rate of heat transfer through the glass, measured in watts per square metre per Kelvin (W/m²K).

The lower the U-value, the better the insulation performance.

In simple terms:

Higher U-value = more heat loss | Lower U-value = better thermal efficiency

Aluminium is naturally a good conductor of heat. Without insulation, heat from inside a property could easily transfer through the frame to the colder outside.

To prevent this, aluminium profiles are thermally broken using polyamide sections between the inner and outer parts of the frame. Polyamide is a strong, glass-reinforced plastic that acts as an insulator, significantly reducing heat transfer through the frame.

This thermal break helps improve the energy efficiency and comfort of the building.

Powder coating provides superior durability and performance compared to traditional wet paint.

Because the powder is thermally bonded to the surface during curing, it forms a tougher and thicker coatingthat is more resistant to chipping, scratching and general wear. This makes it particularly suitable for outdoor aluminium products.

Powder coating also offers excellent colour retention. Over time, exposure to sunlight, heat and moisture can cause coatings to degrade in a process known as chalking, where the surface becomes faded or powdery.

High-quality polyester powder coatings resist this process much better than many wet paints, helping the finish maintain its colour and protective qualities for longer.

PAS 24 is a recognised UK security standard for doors and windows. Products tested to PAS 24 have undergone rigorous assessments to ensure they can withstand common methods of forced entry.

Choosing a PAS 24-certified product gives homeowners confidence that the system has been professionally tested and approved for security, helping to protect their property.

Korniche products are supplied through the trade and sold directly to businesses, not directly to homeowners.

We always recommend that Korniche products are installed by an experienced installer or builder to ensure the best performance, finish and long-term reliability.

If you are a homeowner looking to purchase a Korniche product, you can use our Where to Buy tool to find a local supplier or installer who can supply and fit the product.

We strongly recommend that Korniche products are installed by a qualified installer or builder. Professional installation helps ensure the product performs correctly, looks its best and meets all relevant building standards.

Korniche products are supplied through the trade and sold directly to businesses. Homeowners can use our Where to Buy tool to locate a local supplier or installer.

Our patented Speed Bead system is used on Korniche bifolding doors, sliding doors and glass partitions to secure glazing units within the sash.

Traditional aluminium systems use a separate bead that must be tightened with a wedge gasket, which can be time-consuming to install and may result in inconsistent finishes.

Speed Bead simplifies the process. It features a pre-fitted gasket and clip-in design, allowing the bead to be installed quickly and securely.

This system provides:

A cleaner, more refined finish

Faster installation

Improved consistency

As a standard, our bifolding doors are preassembled before delivery. The doors only need to be fixed into position and the glass fitted. However, we can supply the doors in kit form if required. This means the outerframe is in four pieces and the sashes packaged up separately. There are various reasons why doors might be required this way but some of the main reasons are down to restrictions on access. For example, if the doors are being fitted in a property where there is no route to the intended location except through the house, then kit form would be a viable way of achieving this.

Most people want the option to have one of the sashes that can be used as an everyday access door instead of having to fold at least two sashes together to get in and out of the property. This access door is known as a traffic door. It has a more traditional lever / lever handle fitted to it and has the locking barrel incorporated. For more information on which styles incorporate a traffic door, look in the bifolding door section.

Usually unless the shootbolt is locked then it remains possible to force the shootbolts up with a jemmy bar from the outside and on doors with out a traffic door, this means the doors can be opened and access can be gained to the property. We engineered a unique feature into our shootbolt handles that means in their closed position they physically cant be back driven from the outside. This means that although there is the added piece of mind from the key operated shootbolt lock, it isn’t required to keep your property safe and secure.

3 star locking barrels have been subjected to an attack test in addition to the testing performed on a one star cylinder. 3 star locking barrels resist direct attack and offer a significant security upgrade to any door regardless of the type of handle used. The 3 star barrel is part of the enhanced security we offer as standard as part of the PAS24:2016 standard.

New build extensions usually require trickle ventilation to comply with building regulations. It is always best to ask your preferred installer or building control officer about this and how much trickle ventilation is required. Our trickle vents can provide 2500mm2 each and we can offer up to 3 vents in each door set.

In most other bifolding door systems the trickle vent is usually housed in a frame extender that is fitted to the top of the door. This is both unsightly and adds additional cost and so we developed our system to allow trickle vents to be fitted directly into the head of the door outerframe.

The traffic door automatically comes with shootbolt extensions to the main lock when the sash height is 2261 mm or greater. This is done to support the top of the sash and offer better weather performance.

Q-Lon seals offer the ultimate in material and function to provide the highest standard of sealing ability, even under extreme conditions. As they have a foam core, they offer excellent memory and return to their original shape even after periods of long compression and due to the polyethylene film and polypropylene insert, they provide fantastic sealing performance and don’t stretch or shrink over time.

Sealed bearings are often not used in the design of bifolding door rollers; however, they stop debris and moisture getting into the bearings which significantly increases the life of the bearing. So, bearings on the Korniche door include weather sealing rings on the horizontal rollers and nitrile rubber seals on the vertical rollers.

Korniche bifold door rollers feature roller articulation exclusive to Korniche. When double wheel axles are used, the loads on the two wheels fluctuate as the roller is moved along the door threshold. The articulation allows for load balancing between the two wheels, which results in smoother operation, less sensitivity to floor flatness and longer product life.

Roller bearings provide the lowest friction available for Korniche bifold doors are currently available. Many competitors utilise roller bearings on only the vertical wheels and plain bushes on the horizontal wheels. The horizontal rollers take as much load as the vertical wheels when the doors are folded fully open and so it is important to have the lowest possible friction on all the axles. The result is a very smooth door action with minimum friction and no stiction throughout the age of the doors.