Interior Bi-Fold Doors

Interior bi-folding doors are not just a way to create the illusion of space in small rooms, but also have great potential for flexible open-plan living.

Designed to elicit a feeling of warmth, these doors allow you to benefit from a cosy environment whilst allowing light to flow naturally through your home.

interior bi-folding doors

What Are Bi-Fold Doors?

Interior bi-fold doors (also known as internal folding doors and concertina doors) are made from a series of panels and can fold in or out of a threshold to open up space.

With bi-fold doors that have an odd number of panels a traffic door can be created, so that the user doesn’t need to fold all the panels back when access is required. Bi-fold doors can be fitted to a track on which the panels slide along when being folded back.

Wood effect uPVC Bi-folding door

Bi-fold doors can be fitted as exterior or interior doors to make the most of both indoor and outdoor spaces. 

They are usually made with built-in glass panels to allow plenty of light in, which helps to create the illusion of space through greater visibility of more space elsewhere.  

Why Invest in Interior Bi-Folding Doors?

Maximise Space

Interior bi-fold doors are a great way to maximise space in your home, as the concertina design of bi-fold doors means that the panels can be folded up against a wall when no longer needed.

White uPVC Bi-Fold Doors

As well as this, interior bi-fold doors can help create the illusion of space, even in a smaller home. This is because the visibility of other, larger spaces from inside a smaller room, even when the door is closed, allow even the tiniest of rooms to appear spacious.

Room Dividers

Internal bi-fold doors are most commonly used to divide larger rooms because open-plan living areas are not always practical.

Interior bi-fold doors allow you to have the best of both worlds, as you can close the doors to use rooms separately and still maintain a good level of sound-proofing and privacy, whilst also having the ability to open the bi-fold doors for more space when you need it.

uPVC Bi-Fold Doors

An added bonus is that dividing a large room into smaller sections can help create a cosy environment that is easier to keep warm in the winter, but still allows plenty of natural light in.

Having the ability to separate your kitchen from your living area helps you to keep control of cooking smells, and avoid undesirable, stale odours lingering in other parts of the home.

As well as this practical feature, installing internal bi-fold doors in your kitchen and living areas can give your home a wonderful contemporary feel to welcome guests into.


If you’re thinking about installing internal bi-fold doors in your home and privacy is an issue, don’t forget that bi-fold doors can be fitted with frosted glass or integral blinds.

Blinds or curtains are perfect for when you want to maintain the illusion of two separate rooms most of the time, while frosted glass allows you to have a luxurious part-time feature wall, without sacrificing room to room privacy.

bi-fold patio doors

Secret Stores

Give your home the look and feel of a well-organised and tidy space with interior bi-fold doors and create a lasting good impression. Internal bi-fold doors can serve as the door to a small pantry or larder that you don’t want in view all the time. Simply specify your bi-folds with frosted glass.

You may want to consider using interior bi-fold doors to conceal other household necessities, such as a laundry room, with a more aesthetically pleasing interior bi-fold door as well.

Added Value

Installing internal bi-fold doors in your property can increase its market value if you happen to sell it. As bi-fold doors bring more light and allow for more space to be saved, internal bi-fold doors can be a valued selling-point in the property market.


As well as this, the stylish appearance of modern interior bi-fold doors means that potential buyers are likely to remember your property as one with unique character and charm.

A Sense of Style

Interior bi-fold doors come in a variety of colours and styles, which means you’re always able to choose a bi-fold product to suit the style of your home.

What Sizes Do Bi-fold Doors Come In?

Bi-fold doors come in a range of sizes, but their height is usually between 2090mm and 2100mm, in order to fit most standard internal doorways.

However, the width of bi-fold doors entirely depends upon the size of your aperture. The widths of bi-folding doors start with two-panel bi-folds at 1800mm wide, but can go up to 4800mm with up to six panels.

What Are My Options in Terms of Materials?

The type of material you choose for your new internal bi-fold doors should be determined by the purpose the bi-fold door would serve.

Timber is a popular option for living areas, and oak is often a favourite because of its durability and aesthetic appeal.

Interior bi-fold doors can also be glazed with a glass of your choice, with frosted or patterned glass normally being used for privacy reasons or to suit the style of the property’s interior design.

For wardrobe bi-fold doors, glass, timber and even mirrors have been used to create a modern look in many bedrooms.

Fitting Interior Bi-Fold Doors

Consider yourself good with DIY? Watch B&Q’s video on how to fit interior bi-fold doors. Of course, if you are after UPVC or aluminium bi-folding doors, it’s best to go direct to a specialist company.

Interior Bi-Fold Door Prices

Don’t compromise on price! Use our online double glazing prices calculator to find the best quote. Double Glazing on the Web can put you in touch with several companies to so you can make sure you’re paying a fair price.

Frequently Asked Double Glazing Questions

Frequently Asked Double Glazing Questions

What Happens if I Have a Problem with my Windows or Doors?

All of the double glazing installers in our network offer product guarantees. Provided you are still covered by your manufacturer's guarantee, all you need to do is contact the installer in question and they will either repair or replace your windows and doors.

Can Double Glazed Doors be Fitted with a Pet Flap?

Depending on the style of door, a pet flap can be fitted as an extra service. The only exception is when glass panels feature on the lower half of the door.

How Much Do Doors Cost?

Your double glazed door cost will depend on specifications such as style, size, locks, glazing and door furniture. Double Glazing on The Web gives you the opportunity to create your very own unique door quote online. Start your free door quote today.

What Colour Options are Available?

There is a wide range of colour options available including both standard and bespoke colours and finishes. Aluminium windows and doors even come available in a RAL colour chart which gives you an infinite choice.

Why Should I Choose One Of Your Installers?

All installers that operate in affiliation with Double Glazing on the Web are accredited by a recognised industry body such as FENSA or CERTASS. Double Glazing on the Web vet all of our double glazing installers to make sure you receive a professional and efficient quality service.

Which Bi-folding Door Configuration is Best?

When choosing the arrangement of your bi-folding doors you need to consider the size and layout of your room. Outfolding bi-fold doors will take up less internal space when completely folded back and a left of right folding will be dependent on space available in your room.

How Long Does It Take To Install Bi-Fold Doors?

If a survey is scheduled within 48hrs then your bi-fold doors can be supplied and installed within just 6 – 8 weeks.

How Secure Are Bi-Folding Doors?

Bi-folding doors are extremely secure and are built with a high security locks as standard. Each of our double glazing installers will offer their own range of locking systems with additional upgrade options for all security conscious homeowners.

Can I Have Front Doors With Glass?

Entrance doors come in a wide range of designs for your home, including a choice of side panels and glazing. Your double glazing installer can offer you a range of front door designs with glass.

Are UPVC Doors Easy To Maintain?

UPVC doors are extremely easy to maintain and will never require re-painting or varnishing. Neither will a UPVC door rot or warp!

Do You Do Replacement Front Door Locks?

The majority of our double glazing installers do provide replacement front doors and replacement front door locks. Please call one of our advisors on: 0800 015 5679.

What Are Composite Doors Made Of?

Composite doors are made of a combination of high performing materials which is why they are so strong and incredibly long lasting. The composite door is made from: reinforced UPVC, fibreglass skin, high density foam and a water resistant composite materials.

Do Composite Doors Fade?

Composite doors feature a tough and durable skin where colour runs throughout rather than a simple surface coating. This means a composite door is not likely to wear or fade like the majority of painted doors. A composite door is very long lasting which also reduces the amount of maintenance required to keep it looking in top condition.

Do Composite Doors Need Painting?

Composite doors do not require re-painting. These low maintenance doors feature a water resistant GRP, coloured skin which keeps a pristine appearance year after year.

Do Composite Doors Warp?

A composite door will not warp like wood and won't require regular painting.

Can I Get Composite Side Panels?

Composite doors are available with matching composite side panels, your installer will offer you a choice of colours and glazing.

Is Every Composite Door Different?

There are different qualities to every composite door and they will vary between manufacturers depending on materials used. At Double Glazing on The Web we only put you in touch with the highest quality suppliers and installers.

Can I Choose Custom Glass?

You can choose from a wide range of custom glass. Your double glazing installer will offer you a choice of glass types and glazing designs so you can choose custom glass for your windows, doors or conservatory.

How Much Do Composite Doors Cost?

The cost of a composite door will be dependent on several factors such as the composite door style, composite door colour, size, composite door hardware and composite door security extras. The fastest way to get a composite door price is online with our door cost calculator.

What Do Stable Doors Look Like?

These country style doors offer charming aesthetics and are a stylish alternative to standard back doors, stable doors a great choice for any kind of property. This door is split in two halves which open independently from one another as well as function as a whole. Whether you are after a traditional stable door or more contemporary design with modern glazing, your double glazing installer will be able to offer you a wide range of options for your property.

Are UPVC Stable Doors Made To Measure?

Your UPVC stable door will be made to measure and tailored to your specifications given to your double glazing installer.

How Much Do UPVC French Doors Cost?

UPVC French door prices will depend on your personal requirements and specifications such as size, style and glazing. To get an average French doors cost use our door cost calculator for a free online quote.

Are UPVC Patio Doors Secure?

UPVC patio doors can be fitted with a choice of high security locks to make them extra secure. You can also choose from a range of glazing styles to further enhance the strength of your patio doors.

Do I Need Planning Permission For Patio Doors?

You may require planning permission for double glazed patio doors if you have a listed building or happen to live within a conservation area. Visit the V for more information.

How Do Sliding Patio Doors Work?

UPVC sliding doors operate on a smooth, easy glide system which allows for effortless transition. They are attached to metal or vinyl tracks which are fitted to the top and bottom frames and plastic rollers are added to ease the movement.

How Do Slide and Swing Doors Operate?

A multi-pane door with individual panes slides on a single track with no loss of space. Panes are able to operate individually with no visible hinges or hardware. The slide and swing door can open up spaces between rooms or between home and garden or even conservatory.

How much does it cost to replace a front door?

The price of a new front door will depend on the type and style of door you choose. The cost of a replacement uPVC front door can be as little £600 or as much as £1,200. Composite doors can start from around £800 but can cost around £1,500. The type of glass, extras and locking system you choose will affect the price of a front door. Get an online quote for uPVC front doors and composite doors to get a good indication of the cost.

How much should you spend on a front door?

The amount you spend on a front door will depend on the type of door you are looking for. uPVC front doors are generally cheaper than composite doors and can cost as little as £600. Composite doors start from around £800 to £1,000. If you choose more bespoke glass option or door accessories you can pay as much as £1,500 to £2,000. We recommend getting a number of quotes to see the different options that are available and compare front door prices.

How much does a cheap door cost?

A cheap uPVC door can be as little as £500, especially if you are looking for a back door. Front doors tend to be more expensive than back doors and cheap ones will start from around £600. Cheap composite doors usually start from around £800 to a £1,000. The locking system and glass options you choose will also affect the price of the door.

Which front door material is best?

There are several options when it comes to front door materials. The three most popular are wood, uPVC and composite. The material you choose will depend on what you are looking for. Wooden doors tend to be more expensive but offer a traditional style. In some instances, such as on listed buildings and in conservation areas it may be a requirement that the front door is wooden. uPVC doors are a cheaper option. They are energy efficient and durable but lack a traditional appearance. Composite doors are perhaps the best of both worlds as they are durable, low maintenance and replicate the traditional look of timber.

Are composite doors cheaper than uPVC?

Composite doors are usually more expensive than uPVC doors. This is because they are made from a number of materials rather than just uPVC plastic. They will often have a wooden internal frame and insulating filling. They emulate the traditional look of wood and are available in a multitude of styles and colours. uPVC door are generally cheaper but are a good durable and low maintenance option if you are on a budget.

What Is A Composite Door?

A composite door has the aesthetic of a wooden door, however, it has the practicality of a uPVC door meaning it will not warp like traditional timber. A composite door is very strong and secure as it is made up of uPVC, wood, insulating foam and glass reinforced plastic.

How Long Does It Take To Install a Composite Door?

It will take one or two installers between three to four hours to install a single composite door.

Are Composite Doors More Expensive Than uPVC?

Typically, yes. A composite door is more expensive than its uPVC counterpart due to the nature of how it is manufactured. Please refer to our pricing guide below to see the difference.

What Is The Difference Between French Doors and Patio Doors?

Patio doors originally related to the style of door that slides open but now has become a blanket term for other doors including French doors. French doors are hinged doors that swing outwards and, when open fully, allow access to all the space of the installation.

How much do composite doors cost?

Composite doors are a great alternative to traditional timber doors and offer unparalleled thermal efficiency, security, durability and thermal performance. They are also extremely weatherproof. Composite doors consist of an insulating core that is designed to keep warm air trapped inside your home, while keeping cold air outside. This can save you a significant amount of money on your heating bills over time. The insulating core is covered with a durable and hard wearing skin which makes the composite door extremely rugged and weatherproof. Composite doors are available in a range of colours and can be customised further with decorative glass and practical additions such as cat flaps. As composite doors are a top of the range product, prices do start high. Prices for composite doors begin at £1000, increasing to £1500 depending on your choice of glazing. However, if this fits into your home improvement budget, the composite door is a fantastic addition to any home.

Bi Fold Door Prices