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What is a composite bifold door? Benefits, comparisons, colours and glass

Amanda Hewer - Operations Manager

Author: Amanda Hewer - Operations Manager

Composite external bifold doors feature durable and robust aluminium on the weather-exposed side and rich-toned timber facing inwards into your living area.

The design of a composite door allows you to capitalise on the best properties and aluminium and wood: strength and beauty, whilst allowing natural light to flood into your home. While aluminium stands up well to wind, rain and sun and provides the benefits of an aluminium bifold door, the beauty of the internal wooded frames can be easily incorporated into your interior design.

This page will look at the benefits and performance of composite bifold doors.

Composite door Composite door

What is a composite bifold door?

Modern external bifold door frames are made from one of the following materials: Wood, aluminium, uPVC.

All types allow natural light into your home, and all improve access to your garden or patio; however, the materials do have different properties which should be considered. Each material has its own properties and benefits so these should be considered before you decide on which type of bifold door you want to install in your home.

It is widely accepted that wood offers a beautiful, natural finish while an aluminium bifold’s strength results in thinner frames, slim sightlines, less maintenance and a more modern style.

Composite folding doors and windows make the most out of these qualities by placing protective aluminium on the outside of your home and the richly appealing wood on the inside. This design helps you to match both the external style of your home and other windows and doors but, the wooden inside will match with your interior décor including flooring and other features.

What are the benefits of composite bifold doors?

External composite bifold doors are at the forefront of modern bifold doors. Composite bifolds utilise the best qualities of the combined materials to create a durable, stylish and insulating bifold door that allows you to enjoy the natural light that bifold doors introduce to your home.

Key benefits include:

  • Best of both materials — Timber provides excellent thermal insulation and noise reduction while aluminium offers weather resistance and added durability
  • Low maintenance — Composite doors with external aluminium cladding require less maintenance than other techniques
  • Excellent thermal insulation — Wood is a fantastic natural insulator. Timber frame composite bifolds will offer some of the best U-values in the country
  • Added security — Vufold composite doors are engineered to be fitted with multipoint locks and, triple glazed toughened safety glass

To compare composite bifold doors with other materials such as wood and aluminium, please read our guide.

What’s the difference between a composite bifold door and a composite front door?

While they share a similar name, composite bifold doors and composite front doors are often made from different materials.

  Composite front door Composite bifold door

Made from a number of different materials:

  • Wood
  • Insulating foam
  • Glass reinforced plastic (GRP)
  • Aluminium
  • Timber

How are composite bifold doors made?

There are three ways to construct external composite bifold doors:

  1. Use a timber frame and add an external aluminium cladding (known as aluminium clad-timber)
  2. Start with an aluminium bifold frame and add wooden strips on the side facing the interior (known as timber clad-aluminium)
  3. Timber and aluminium sandwiched around a foam core

Aluminium-clad timber — or alu-clad — offer a number of superior specifications:

  • Thermal insulation — Wood is a better insulator than aluminium
  • Noise reduction — A solid timber frame will cut out more sound than aluminium. This makes alu-clad bifold doors the best choice for those living near train tracks or under flight paths, especially when the frame is combined with triple glazed glass

Vufold’s Ultra range of composite alu-clad bifold doors feature resilient powder-coated aluminium on the outside and a beautiful oak-finish interior.

To look at our composite bifold doors range, click here.

Alu-Clad composite vs uPVC bifold doors

  Alu-clad composite doors uPVC doors
  • Modern style
  • Various door configurations available
  • Can look cheap
  • Limited designs due to singular material
Thermal insulation
  • Wood is an excellent natural insulator
  • Vufold's Ultra composite bifold doors range has a U Value of 1.0 W/m2K making it one of the most thermally efficient doors in the UK
  • Aluminium cladding protects wood from weather damage which reduces chance of draughts
  • Good insulation
  • Weather damage can cause expansion/contraction which creates draughts
  • Low maintenance
  • Regular cleaning with soapy water for external doors
  • Low maintenance
  • Regular cleaning with soapy water
  • Vufold uses ‘engineered construction’ which is stronger and less likely to cause expansion or warping
  • Powder-coated aluminium is incredibly durable
  • Corrosion-resistant
  • Durable material
  • Expansion/contraction can cause door operational issues
  • 10 – 15 year guarantee usually
  • Expected lifespan 45 years
  • 10-year guarantee as standard
  • Expected lifespan 20-30 years
  • Vufold use Vectis, cylinder free multi point locks, designed to meet the requirements of PAS 23/24
  • Vufold doors are manufactured to be fitted with multipoint locking systems for added security
  • Vufold doors use triple glazed tempered safety glass which is harder to break through
  • Composite doors are thicker by design so harder to break
  • Secure if used with multipoint locking systems
  • Cheaper uPVC doors may offer poorer levels of security
  • More expensive but better value for money
  • The price for higher quality materials provides improved insulation and longer lifespan
  • Cheap price
  • Will not offer the same quality
  • Shorter lifespan

Best composite door: Vufold Ultra Range

Ultra range door Ultra range door

The Vufold Ultra Range combines the resilience of aluminium bifolds with the thermal efficiency and style of timber.


The design of Vufold’s Ultra range of bifold doors allows you to take advantage of a number of benefits:

  • The aluminium cladding ensures minimal maintenance with maximum durability. A regular soapy clean is all that is needed on the external side.
  • The timber inside can match interior floorings or furnishings while also providing excellent natural insulation.
  • For even better insulation, the external bifold door is also fitted with triple glazing which is made from two sealed, argon gas filled units and low e thermal toughened safety glass.

Weather tested

The Vufold Ultra range has been rigorously weather tested which includes:

  • Air permeability
  • Water tightness
  • Resistance to wind loads

All of these ensure durability and longevity even against the elements in the UK. It also comes with a 10 - 15 year guarantee.


The high security specification multipoint locking system means that you can rest with the knowledge that your composite bifold door has been supplied with a lock designed to meet police specification in the UK for top-quality security.

CE Marked

As with all Vufold External Bifold doors, the Ultra range is accredited with CE Marking, meaning the door is: fit for purpose, reliable and conforms to the relevant safety standards. Plus, easy-to-follow instructions means that any competent DIYer can install.

The Vufold Ultra range is available in sizes between 1.8m and 4.8m and in various configurations.

Click here to find out more about Vufold's composite bifold doors.

Colours and finishes for composite doors

Vufold uses RAL powder coating for composite doors. This ensures quality, durability and longevity with your finishes.

What is powder coating?

Powder coating is a type of dry finish. It is one of the most popular finishes in the industry as it offers a high-quality, durable finish.

Unlike some paints, powder coating does not contain any solvents and release little to no volatile organic compounds that contribute to pollution. This means powder coating is considered safe and more environmentally friendly than standard paints. There are several other benefits to powder coating which you can find below.

Benefits of powder coating

  • Improved durability — powder coating helps protect your bifold from pollution, weather and coastal damage and is less likely to show damage compared to other finishes
  • Brighter for longer — powder coating colours will stay vibrant for longer without showing signs of weathering
  • Thicker coating — a thicker coating can be applied without the colours running

RAL finishes

The Vufold Ultra range comes with an oak finish on the inside of the door offering a natural, homely aesthetic. For the aluminium exterior of the door, the Vufold Ultra comes in two standard RAL finishes:

  • Hippca White (RAL 9016)
  • Anthracite Grey (RAL 7016)

Hippca White (RAL 9016)

Hippca white bifold door Hippca white bifold door

Hippca white brings lightness to your bifold door without drawing a lot of attention and can help to reflect the light that comes into your home. White is a neutral colour so works with any number of colour combinations. The white/oak combination creates a beautifully light and natural style to your external bifold door.

Hippca white is one of the most popular finishes available and for good reasons.

Anthracite Grey (RAL 7016)

Grey bifold door set Grey bifold door set

Grey is also one of the most popular choices for bifold doors. It’s a modern and stylish choice for any type of home. Grey is also a neutral colour meaning that it will go with almost any colour combination.

The oak/grey combination works with both modern and traditional style homes offering an amazing amount of versatility from a single bifold door.

Glass and glazing for composite bifold doors

Composite bifold doors have excellent thermal insulation due to natural insulation provided by the wood. However, a vital insulating aspect of any bifold door is the glass. Because glass takes up a considerable amount of door space, it's essential to ensure that your glazing is of a decent level. 

The Vufold Ultra composite range utilises the best glazing available: triple-glazing. With triple-glazing, your bifold will have one of the best U-values in the UK (which the Vufold Ultra composite bifold doors range has!). You will also be able to enjoy an abundance of natural light in your home whilst staying cool in the summer and warm in the winter.

What does U-value mean?

To put it simply, the U-value is the measurement of material insulation effectiveness. The lower the value, the more effective the material is.

The key part to remember is that the glass and the frame will have different U-values due to being made from different materials. So, a pane of glass could have an excellent U-value but is undermined by the poor U-value of the frame. This is why you should focus on the overall U-value.

The overall U-value combines the U-value of the glass and frame. The Vufold Ultra range has an overall U-value of 1.0 W/m2K which means it has excellent thermal properties.

Read our guide to find out more about choosing the best type of glazing for your bifold door.

What is triple-glazing?

Triple-glazing is made with three panes of glass rather than one (single glazing) or two (double glazing). Three panes of glass are placed with a cavity between each pane. This cavity is often filled with an inert gas. This combination is designed to help insulate your home and reduce any lost energy. In addition, if you live in a more exposed area of the UK, triple glazing can help to protect your home and keep it warm during varying weather conditions.

Glass: safety and security

Security should always be a consideration when purchasing external bifold doors. You want to ensure that your bifold doors are secure enough to make it difficult for criminals to break into your home.

There are two main types of glass recommended for external bifold doors:

  • Tempered safety glass (also known as toughened glass)
  • Laminated glass

Tempered safety glass

Tempered safety glass is created by heating and cooling glass multiple times in a tempering furnace. This process makes the glass 4 – 5 times stronger than before, adding extra security to your door.

Key features:

  • Strength — tempered safety glass is up to 5 times stronger than standard glass
  • Alerts neighbours — it will likely take multiple attempts to break tempered safety glass which will create a loud noise to alert neighbours. Plus, tempered glass shatters when broken which creates even more noise
  • Reasonable price — including tempered safety glass with your bifold is unlikely to increase costs

Laminated glass

Laminated glass is created by sandwiching a layer of vinyl between two pieces of glass. The combination is then bonded with heat and pressure. This technique means the glass remains as one piece, making it harder to break through.

Key features:

  • Harder to break — while laminated glass isn't any more robust than typical glass, the vinyl layer will make it harder to break through
  • No holes — the vinyl layer means that criminals can’t smash holes in the glass to break through

Amanda Hewer - Operations Manager


Amanda Hewer - Operations Manager

About Amanda Hewer

Having been at Vufold for around 12 years now, Amanda became operations manager after spending time in Customer Service, Sales, Order Processing and our Warehouse. Amanda likes that no two days are ever the same and believes her successful career stems from her keen interest in people, helping them achieve their goals and striving for constant improvement across all departments.

Read more about Amanda Hewer