Aluminium Bi-fold Folding Door

Aluminium Outside View Bi-Folding Door

WarmCore Aluminium Bi Folding Door made to your measurements.

Which aluminium Bi-Fold door should I choose? If you are looking to buy then its not all about price. Warmcore doors are built to combine the benefits of both Aluminium and uPVC by combining the two materials you get a great patio door with great looks and a great U-Value. Built around a belief that beauty doesn’t have to compromise performance, WarmCore aluminium folding sliding doors were created out of a desire to combine the desirability and durability of aluminium with unparalleled insulation. The orange thermal core - hidden away in the finished doors - is key to why WarmCore doors are 25% more thermally efficient than traditional aluminium systems. Built WITH A REVOLUTIONARY thermal core at its heart

Strong and secure, We manufacture WarmCore doors in Bristol that come with class-leading security built in, backed by a comprehensive 10-year product guarantee, reinforced by the ERA Five Star security guarantee.

Inwards or outwards opening doors up to 6m wide, with as many as 7 opening sashes glide along custom designed tracks. While a wealth of colour, style and configuration options help you choose the perfect warm, secure and beautiful WarmCore door for your home.

The beautiful, strong and secure door that is 25% more thermally efficient than the competition!

Warmcore, the warmer choice that saves you money

The traditional weakness of aluminium doors has been the aluminium itself. While a beautifully strong and hard-wearing material, aluminium is a good conductor of energy. Meaning that the warmth from your home finds an easy path outside, leaving you colder and with higher heating bills. Most aluminium folding sliding doors try to overcome this inherent weakness by replacing a section of aluminium with a small thermal break of less conductive material to lessen this heat loss.

WarmCore took a different approach, from inception this revolutionary folding sliding door was designed to be as thermally efficient as possible. Built around a full-width thermal core - maximising the use of low conductive material - WarmCore is 25% more efficient at keeping heat in your home than traditional aluminium doors. Yet it doesn’t compromise strength as the outer faces of the profile are high-grade aluminium, positioned to add the greatest structural rigidity.


Close Up of Triple Glazed Cross section with Frame


Robustly designed to take the weight of triple glazed panes as standard.

Choose this option on your Bi-folds for the best thermal performing doors currently available on the market.

At least 75% better than a standard Bi-fold door with an amazing U-value of 1.0

High performance, easy clean glass Celsius Clear insulated glass is available as an optional upgrade on WarmCore folding sliding doors.

This unique high-performance glass utilises a Low-E and solar control coating, with an Argon
filled the cavity, to limit the amount of UV and heat that passes through the glazed unit, giving the ultimate in thermal control, whatever the weather.



From the finish to the hardware, WarmCore bi-folds come with a 10 Year Guarantee.

Suitable for coastal use - the 60-80 marine grade micron powder coat finish on the aluminium bi-folds

have been designed to stand the test of time.

Tough hinges are extruded along with quad rollers and precision engineering to give a high performing consistently even bi-fold

All the fixings are stainless steel and are resistant to corrosion.

You can feel confident in your decision to add a WarmCore bi-fold to your home!

Bi-Fold Internal Cross Section of Frames

With hardware developed in partnership with one of the UK’s leading home security manufacturers - ERA - WarmCore doors are covered by the comprehensive ERA Five Star Guarantee. Providing exceptional security and peace of mind.

  •  24/7 help when you need it. The ERA Five Star Guarantee gives access to a FREE call out service so you have the reassurance of knowing that, in the unlikely event of forced entry, a trained professional will come to secure your property.
  •  Up to £1, OOO home insurance excess paid

The ERA is so confident in the quality, reliability and security of the WarmCore door, they will even pay the excess on any home insurance claim due to the failure of an approved component- so you can rest assured that you’re covered.

  •  Up to £1, OOO towards a repair or replacement

ERA’s research and development team are so confident that WarmCore will outwit any would-be burglars that if the ERA Five Star Guarantee approved component has failed, ERA will pay up to £1,000 towards the cost of replacing or repairing your doors.

  •  £1, OOO cheque to compensate you

In the unlikely event of a break-in succeeding through the failure of a component covered by the ERA Five Star Guarantee, you will be given a cheque for £1,000 to compensate you for the inconvenience caused.

  •  Savings on the cost of your home insurance

By choosing to fit WarmCore with the highest levels of security, you can save money on your home insurance, year after year.