Warmcore Aluminium Bi Fold Door - 4 Door

UPVC Doors are high quality Vacuum Formed 100% uPvc Doors. Manufactured by compressing two PVCu skins either side of an Extra High Density Natural core at pressures three and half tonnes per square metre. Creating a solid door panel that is resists both heat and moisture and retains a high colour stability. All door panels are backed by a 10 year manufacturers warranty. Door panels come in a selection of styles and finishes, from white to woodgrain and half glazed to completely solid panels.

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TOTAL: £3 000.00


The Beautiful, Strong and Secure door that is 25% more Thermally Efficient than the Competition

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 unparallelled 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, WarmCore doors 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.

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.

U-Values explained

A U-Value is basically a measure of heat loss through a structural element. It is calculated on the rate at which heat transfers through 1 square metre of a structure and is stated in W/m2K. U-Values are used by the construction industry to compare the thermal performance of different materials and products.

Warmer by Design

Warm, wide span doors for modern living

WarmCore has been designed from the ground up to offer market-leading thermal performance, and comfortably meets the requirements of Building Regulations - Part L. Traditional aluminium doors struggle to meet current legislation, forcing you to choose aluminium aesthetics and finish over thermal performance. WarmCore gives you both, with its innovative full width thermal core.

This unique composite construction creates the most thermally efficient folding sliding door in its class. This design philosophy has produced a folding sliding door that has exceptional thermal performance, helping keep fuel bills lower and heat in your home, while retaining the sleek and architectural look of aluminium.

Helping Transform your Living space

Stylish Interiors, brought to Life

Modern living is about creating spaces that work for you and your family, that adapt to the needs of the moment. Gone are the days of rigidly defined spaces. WarmCore folding sliding doors were born from this ethos, and their flexibility helps your home become a space that works for you. Open and airy on beautiful summer days, warm and insulating in the colder months. WarmCore doors help integrate outside living space with interiors, enhancing both.

Truly transformative, WarmCore doors will help breathe life and light into your home.

Practical for Everyday use

Flexibility built-in

The innovative design of WarmCore folding sliding doors enables you to split the door sashes in whichever way suits your home. You can have all the sashes fold to the right or left, or have them split in any combination you choose. A popular configuration is to have a single door at one end, called a traffic door.

This allows you to leave the majority of the door sashes locked in place, using a single door for everyday use. In addition certain door configurations offer even more practicality, as the door sashes that meet in the middle, or at one end, can be used as a set of French doors - when you don’t need, or want, the doors fully open.

This flexibility enables you to use your WarmCore folding sliding doors in a way that suits you, rather than being forced to fully open them every time. Leave that until you’re entertaining or when the day is so good it deserves to be let in.

Perfect Alignment

Beautiful Aesthetics

Whether you are tucked up inside watching TV with your WarmCore folding sliding doors protecting you from the elements, or hosting a garden party with the doors wide open on a bright spring day, you can be assured your doors will look pristine.

Attention has been paid to how the doors look when stacked open, something often overlooked on traditional door systems. When open, all sashes stack neatly inline with each other and are kept perfectly parallel using discreet magnets.

Open ends of door sashes, hidden from view when the door is closed, are also carefully cloaked in uniform black for a neat and thought-through appearance.

Strong Construction built for Unparallelled Security

Keeping you and your Home Safe

From the unique 5 point lock, designed to run the full length of the door sash, to the high strength hinges and rollers; each element of the WarmCore door combines to ensure optimum security.

WarmCore’s aluminium construction, custom-made roller assemblies - sitting deep within the top and bottom tracks - and extruded aluminium hinges make them inherently strong and secure. Added security features such as integral dog bolts bind the door sashes together when closed, protecting against forced entry.

A custom designed door lock, available on no other door system, uses a 5 point locking system with 3 opposed hook locks and twin shoot bolts - that engage fully into the aluminium top and bottom tracks - helping keep you and your family safe and secure.

Every WarmCore door is independently certified to PAS24:2012, the benchmark in enhanced security performance requirements for doorsets and windows in the UK.

Peace of Mind

From the anodised finish of the hardware - suitable for coastal use - to the 60-80 micron powder coat finish on the aluminium (marine grade is 40 microns thick), WarmCore folding sliding doors have been designed to stand the test of time. All fixings used are stainless steel - chosen to resist corrosion - and tough extruded aluminium hinges, along with the quad-wheeled track rollers are precision engineered to perform consistently every single time, year on year.

Style Options

Your door, your way

Whatever the style of your home, WarmCore folding sliding doors have the options that enable you to create the door that matches your needs.

Available in a choice of 4 hard-wearing powder coated finishes, WarmCore’s unique composite construction enables you to choose a different colour for the interior of your door from the outside, at no extra cost.

There is also a choice of 4 external aluminium designs for the door sashes, 4 threshold options and a choice of 3 handle finishes, Matt Black, Brushed Graphite and Satin Silver.

The following pages detail the options available, to help you build your perfect door.

Colour - your choice inside and out

Choose a different colour inside and out - at no extra cost

Available in a choice of 4 powder coated colours, WarmCore allows you to pick a different colour for each side of your door - at no extra cost. From contemporary Anthracite Grey to Heritage Cream, your choice helps define the personality of your door and helps match the architectural style of your home. Want grey outside with white inside to leave you free to change your interior in the future? – with WarmCore that’s no problem.

external sash styling

A choice of 4 external aluminium door sash designs, ranging from a contemporary pencil round to a decorative sculptured look, enables you to personalise your door or echo the style of your existing windows.
Pencil round 1, Decorative 2, Square 3, Chamfered 4

Versatility through choice

Graceful Handles...In 3 finishes...Built to Last

WarmCore door handles gracefully curve around door sashes when open, tucking into the glass reveal and allowing the door sashes to fold perfectly flat.

Available in 3 hard-wearing finishes, anodised Matt Black and Satin Silver or Brushed Graphite, choose the perfect match to complement your door.

Made to the same exacting standards as the rest of the WarmCore door, the anodised finishes are ideal for use in coastal or exposed locations.

Threshold options

WarmCore doors come with a range of threshold options, including ultra low Part M compliant aluminium thresholds that help avoid trip hazards. Alternatively if you have a step down from your door opening a choice of sills is also available. Configurability is key and you can be confident that WarmCore has the right option for your home.
Aluminium low threshold 1, 150mm sill 2, 120mm integrated sill 3, Outer frame 4

Thermal Performance Upgrade

Triple Glazing - for Ultimate Thermal Performance

Robustly designed to take the weight of triple glazed units as standard, choose this option for the ultimate thermal performance - at least 75% better than standard double glazed aluminium folding sliding doors. Opting for 44mm triple glazing rather than standard 28mm double glazing reduces the whole door U-Value rating from 1.4 to 1.0. Triple glazing is ideal for WarmCore doors installed in exposed locations.

Performance glass upgrade

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 cavity, to limit the amount of UV and heat that passes through the glazed unit, giving the ultimate in thermal control, whatever the weather.

keeps you warm in Winter, and Cool in Summer

Easy Clean technology has also been added to reduce maintenance requirements. Utilising a coating that lasts the lifetime of the glass, dirt and grime simply washes off with normal rain, rather than sticking to the glass.

Precision Engineering

From the sturdy quad-wheeled rollers, to the multiple weather-seals, every element of your door is precisely manufactured and installed to exacting standards. Performance, reliability and ease of use comes from a meticulous attention to detail.

Custom high-strength rollers with a 200kg load capacity are at the heart of ensuring the smooth operation of your WarmCore door. Tested to over 50,000 cycles, these precision components ensure years of trouble-free, reliable operation.

Weather Performance

Triple weather-sealing on all sash interlocks ensures exceptional weather performance, keeping draughts and wind driven rain outside, and you and your family warm and snug. Run-through rubber gaskets create continuous weather-seals helping WarmCore to comfortably exceed the requirements of BS6375-1: the classification for weather tightness on windows and doors.

Technical Data

Max door width: 6000mm
Max door height: 2400mm
Max sash width: 1000mm
Max load per sash: 100kg
Frame and sash sightline: 129mm
Low threshold and sash sightline: 109mm
Sash to sash sightline: 156mm

If you require any more information about our Warmcore range please don't hesitate to give us a call on 01482 947 901



Need Help


01482 488961 / 0844 414 6776



All production processes comply fully with the quality assurance standard BS EN ISO 9001.
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How to measure for a new PVC front door

These guidelines are to help you measure for a new PVC front and frame and make an accurate measurement.

Measure the door opening outside on both the height and width.

You have to always measure the exact brickwork opening and not the old frame or door.

Measure brick to brick in at least three different places and then deduct 10mm from both the final height and width measurements. - This is to allow for the for 5mm fitting allowance around the new frame. This will make sure the new frame will sit plumb and square once in place.

If you have any gaps then spacers and filler will be required to secure the frame into place and fill any of the gaps.

Vital: Please remember:

  • Do not measure your existing door or frame but measure the brick opening.
  • Make sure to measure in at least three different places and deduct 10mm from both the final height and width measurements - we do not make any fitting allowances on the sizes you provide.
  • All dimensions to be supplied in Metric and all designs viewed externally.

How to Measure - Width

The width should be measured brick to brick at three points - top, middle and bottom of the opening. The smallest of these measurements is taken as the width. Always deduct 10mm from the final width.

How to Measure - Height

The height should be measured brick to brick at three points - left, middle and right of the opening. The smallest of these measurements is taken as the height. Always deduct 10mm from the final height.