Elegant, stylish and secure
With their concertina design, timber bifold doors allow the creation of a clear opening which provides a seamless connection with the outside.
A low-profile aluminium threshold provides a smooth transition between the interior and exterior spaces. In addition, we incorporate weather seals on the door leaves and within the track which ensures that all parts of the door are well sealed, thus providing excellent protection from the elements. A low resistance, easy-to-adjust sliding mechanism provides effortless opening and closing whatever size bifolds you go for.
All of our timber bifold door designs are provided with high levels of customisation with a choice of glazing, paints and stains and the option of dual colour. Double and triple glazing is available, with some designs allowing acoustic laminates for exceptional performance.
Architects and Specifiers find us on SpecifiedBy
Discover the benefits
Weather rating
Tested to exposure category 2000 – the highest classification
Thermal performance
A rated as standard; Triple glazed options available
Adjustable hinges & magnetic catches
Allow doors to slide and lock smoothly all year round
Sustainability
Environmentally friendly designs, materials and processes
Acoustic performance
Great performance as standard and extensive test data to guide specification for optional enhanced acoustic performance
Security
Certified to PAS 23:2016 and Secured by Design
Security laminated glazing
Option for improved acoustic performance and safety
Draught proofing (Wind load)
Dual seal design provides excellent draught proofing
Customise and make your new patio doors unique
Our ranges and options make it possible for you to achieve the exact look and feel to meet your property style and desired outcome.
Case Studies
See the projects where this product has been installed.
CASE STUDY
Out with the old, in with the New England: 1930s doctors surgery transformed into contemporary family home.
CASE STUDY
Porthole doors and angled windows create contemporary vibe in Lincolnshire home
CASE STUDY
“Casements and Cocktails” – the party house hosting George Barnsdale timber windows & doors
CASE STUDY
A cracker of a project – self-build in Lincolnshire
Technical specifications
Performance and technical specifications are both available for our Bifold Doors.
Performance
| Thermal (Opening In) | As Standard (Opening In) | Best (Opening In) |
|---|---|---|
| U-Value | 1.3 | 0.9 |
| Energy Rating | -- | -- |
| g-Value | 71% | As Required |
| LT | 81% | As Required |
| Thermal (Opening Out) | As Standard (Opening Out) | Best (Opening Out) |
|---|---|---|
| U-Value | 1.4 | 1.2 |
| Energy Rating | -- | -- |
| g-Value | 71% | As Required |
| LT | 81% | As Required |
| Acoustic | ||
|---|---|---|
| Rw | Spec Dependant | |
| Weather | ||
|---|---|---|
| Classification | -- | |
| Air | -- | |
| Wind | -- | |
| Water | -- | |
| Operation & Strength | ||
|---|---|---|
| Classification | Pass (BS6375 Part 2) | |
| Security | ||
|---|---|---|
| PAS 24 / Part Q/ Secured by Design | Pass (as option) | |
| Sustainability | ||
|---|---|---|
| FSC Chain of Custody | Yes | |
CAD Drawings
| Design | Download Options | ||
|---|---|---|---|
| DS16 - Bifold (Open In) | |||
| All Sizes | |||
| Design | Download Options | ||
|---|---|---|---|
| DS17 - Bifold (Open Out) | |||
| 154 x 59 mm | |||
| 154 x 59 mm | |||
NBS Data
| Design | Download Options | ||
|---|---|---|---|
| Bifold Door | |||
Performance
| Thermal (Opening In) | As Standard (Opening In) | Best (Opening In) |
|---|---|---|
| U-Value | 1.3 | 0.8 |
| Energy Rating | -- | A++ |
| g-Value | 71% | As Required |
| LT | 81% | As Required |
| Thermal (Opening Out) | As Standard (Opening Out) | Best (Opening Out) |
|---|---|---|
| U-Value | 1.4 | 1.1 |
| Energy Rating | -- | A++ |
| g-Value | 71% | As Required |
| LT | 81% | As Required |
| Acoustic | ||
|---|---|---|
| Rw | Spec Dependant | |
| Weather | ||
|---|---|---|
| Classification | -- | |
| Air | -- | |
| Wind | -- | |
| Water | -- | |
| Operation & Strength | ||
|---|---|---|
| Classification | Pass (BS6375 Part 2) | |
| Security | ||
|---|---|---|
| PAS 24 / Part Q | Pass (as option) | |
| Sustainability | ||
|---|---|---|
| FSC Chain of Custody | Yes | |
CAD Drawings
| Design | Download Options | ||
|---|---|---|---|
| DS16 - Bifold (Open In) | |||
| All Sizes | |||
| Design | Download Options | ||
|---|---|---|---|
| DS17 - Bifold (Open Out) | |||
| 154 x 59 mm | |||
| 154 x 59 mm | |||
NBS Data
| Design | Download Options | ||
|---|---|---|---|
| Bifold Door | |||
Looking for other styles? Browse our range
Find out more about the range of timber windows and doors we manufacture.
Bifold Doors: Frequently Asked Questions
Are bifold doors secure?
Our timber bifold doors have superior multipoint locking. We test all our products to PAS 24:2016 and Secured by Design.
Are Bifold Doors heavy?
We have designed our bottom-hung bi-fold doors to overcome the constraints associated with hanging from timber beams and non-standard openings.
The system we have developed is designed to overcome the challenge of hanging heavy weights from timber beams which can cause deflection and prevent the doors from opening properly.
The bottom-hung design will overcome this by transferring the weight to the floor with a special bottom-rolling mechanism in place of the traditional top-roller function.
Can bifolds open inwards as well as outwards?
Yes, we can make our timber bi-fold doors to be inward and outward opening and this provides you with flexibility when planning your inside and outside space.
Are timber bifold doors suitable for larger openings?
Yes, timber bifold doors are ideal for large openings. Their multi-panel design makes them a perfect choice for creating wide, unobstructed views and increasing indoor-outdoor flow.
Can I choose different configurations for my timber bifold doors?
Yes, our bifold doors are available in multiple configurations to suit your space. You can select the number of panels, the direction of opening, and other custom features.
Do timber bifold doors require a lot of maintenance?
Timber bifold doors require regular care, such as cleaning and occasional resealing or repainting, to maintain their appearance and longevity. George Barnsdale’s finishes help reduce maintenance needs.
Are timber bifold doors weatherproof?
Yes, George Barnsdale timber bifold doors are designed to be highly weatherproof. They feature sealing systems and durable timber finishes to withstand various weather conditions.
Can timber bi-fold doors be installed in new builds as well as renovations?
Yes, timber bi-fold doors are a versatile choice suitable for both new builds and renovation projects. They can be tailored to fit into modern designs or complement the character of older properties.
Are Timber Bifold Doors Energy Efficient?
Yes, timber bifold doors from George Barnsdale are designed with efficiency at their core. Crafted using precision-engineered timber and advanced glazing, these doors provide thermal insulation, making sure your home remains warm in winter and cool in summer.
The high-performance materials help to minimise heat loss and prevent drafts, making your home more energy-efficient and comfortable. By lessening the need for excessive heating or cooling, you can expect lower energy costs all year round.
