If you're looking for a door to fit into a smaller space, you might consider buying a bifold door. These doors can be a good change of pace from traditional doors, offering the perfect blend of functionality and elegance, as well as freeing up your floor space.

But choosing the best bifold door for your home can be a headache. Looking up the best materials, configuration and how to maintain them can take a lot of time. In this guide, we aim to provide all the information you need on bifold doors in one place, so you don't need to look anywhere else.

What are Bifold Doors

Bifold doors, also known as folding doors, are made using multiple panels hinged together that slide along a track and fold to the side when opened. Instead of swinging open like a traditional single-hinged door, bifold doors slide and fold, stacking neatly to one or both sides of an opening. This design allows them to create a much wider clear opening than conventional doors. The most common designs have two panels folding in half, but larger bifold doors can come with multiple hinged panels that fold like an accordion.

Common Materials

Material of the door is the first important consideration. Material affects appearance, performance, cost and maintenance, so thinking over it is a must.

It is recommended that you always decide based on your area's climate and the doorway location. So, for an external door, aluminium or uPVC are always better as they tolerate weather exposure better, while wood is better indoors. If you're choosing an internal door, wood is the perfect material, while aluminium is a perfect choice for external applications. Below we have explained some common materials bifold doors are made of in detail:

Aluminium

Due to their strength, durability and low maintenance requirements, aluminium bifold doors are very popular. Their strength means that they can easily support weighted glass panels with ease. Moisture induced warping or rotting is unheard of. Many are sold with powder-coated finishes, for minimal upkeep. Reliable, longlisting, they are supported by long warranties.

uPVC (Vinyl)

Bifold doors made from uPVC (unplasticized polyvinyl chloride) are a great, inexpensive option for those who don't wish to spend too much on doors that require maintenance. These bifold doors are also excellent at retaining the heat in your home, meaning you won't have to worry about having cold drafts blowing through your door every time it's opened or closed. If you're concerned about finding an affordable yet functional option and costs are your main priority, then uPVC bifold doors are your best option.

Wood (Timber)

Bifold wooden doors are usually constructed from hardwoods such as oak or softwoods like pine, giving a classic, elegant appearance and natural warmth andbeauty. They are also excellent insulators. Plus, they can also be painted/stained to blend with your decor. However, wood products require constant maintenance, with occasional repainting/resealing the door's finish in order to keep them protected from damage caused by rain and snow. As a rule, wooden frames tend to be more costly than other frame types and also weigh more. With proper care, a wooden bifold door can last for many years, making it an ideal choice for homeowners wanting to add rustic charm to their architectural-style homes.

Composite

Fibreglass bifold doors are made from composite materials. Mix of different materials, they look just like real timber and have an aluminium core. But the price and quality can be very varied. If you are going to purchase a composite bifold door, then it is essential to read up on the specific build and reviews, since a good-quality composite bifold can be an excellent compromise between appearance and maintenance.

Panel Count and Configuration

Bifold doors are modular in nature. You can have anywhere from a 2-panel up to 6 or 7 panels depending on the width of your opening. There are various things to consider when looking at the configuration of a bifold door:

Panel Count - Common bifold door design ranges from 2-panel up to 6-panel for residential options. A 2-panel bifold will simply fold to one side (like a simpler double-door), while the larger panel counts stack multiple panels. Multi-panel doors can open wider, but will also cost more. Choose a panel count according to the access width you are looking for, while keeping costs realisitc.

Fold Direction and Split - You can usually customise how the panels stack when open. Options include all panels folding to the left, all to the right or splitting in the middle. Decide what makes sense for your space: all to one side can clear the opening fully on the other side, whereas a split gives a symmetrical look and divides the stack. We would recommend thinking about what is on each side of the opening like furniture and light switches to determine the best stack side so that panels, when folded, are not obstructing anything important.

Traffic Door - - If possible, design your bifold with a ‘traffic door', which is a single-hinged door within the bifold system that can be opened independently. It's usually one of the end panels that has its own handle and multipoint lock. This allows quick entry/exit without sliding all the panels, and is especially useful for external bifold doors that you'll use often. If your bifold has a traffic door, ensure its on the side that will be most convenient.

Inward vs Outward Opening

It is also important to consider whether the bifold door opens inwards or outwards, especially when you're choosing it for external purposes. One of the first things to think about is space. Bifold panels, when stacked open, will stick out either to the inside or outside. If you have limited room or tight furniture placement inside, you'll likely prefer the doors to fold outward so they don't take up your interior space. An inward-folding door is the best choice for a small balcony or limited patio space,

External bifold doors keep the weather out; however, their performance hinges on the threshold design and opening direction. Most outward opening external bifold doors come equipped with integrated raised thresholds, or sills, directing water away from the inside. Therefore; When using inward opening options, proper drainage and tracking must be of utmost importance as all water will drip into your home once you open these types of doors.

Security Features

Security is a top concern when investing in large door systems. Because so much of some bifold doors is glass, it is important that toughened (tempered) glass is used in its construction. This glass is very hard to break, and even if it does, it crumbles into small pieces rather than dangerous shards.

The main bifold door, or each door if there is no single main door needs to be supplied with a multi-point locking system that secures it in many places along the frame and makes it much more difficult to force open than a single deadbolt. A well-built frame and high-quality locking mechanism will also increase the strength of the door against forced entry. If the doors are durable, have solid hinges, and ideally include additional safety features such as hinge bolts or pins to stop removal/tampering of the hinge, then they should last for a long time.You can even consider extras like integrated blinds (to hide the view into your home when needed), a security bar or drop bolts that can be used when the door is locked at night.

Energy Efficiency

When it comes to exterior bifold doors, energy efficiency is something you will want to think about. To ensure that you have fantastic insulation, you should look for doors with either double or triple glazed glass. Most bifold doors available today utilise insulated glass, which has the ability to trap the air between the two panes, leading to significantly less heat transfer. This process allows your home to stay warm during the cold winter months.

Choose aluminium frames containing a thermal break, which is an insulating non-metal component separating the outer from the inner aluminium parts of the frame. This will eliminate conduction of heat through the frame. You should also ensure that suitable weather stripping and seals have been provided around the entire door. Gaskets should seal the gap between the doors when closed to prevent drafts.

Manufacturers often advertise the U-values of their bifold doors, which is a measure of how much heat transfers through the door. The lower this number is, the better is theinsulation. A modern double-glazed aluminium bifold might have a U-value around 1.4-1.8 W/m2K, while triple glazing can get it closer to or below 1.0 W/m2K. For context, UK building regulations often require external doors to have a U-value of around 1.6 W/m2K or better. Good bifold doors will meet or exceed this.

Maintenance Tips for Bifold Doors

One advantage of bifold doors is that they are generally low maintenance. Keeping the door's bottom track free of dirt, grit and small stones makes movement easier. A bit of silicone spray or a light lubricant can be applied (if recommended by the manufacturer) to keep the rollers running smoothly. Use a specialised glass cleaner or just soap water to clean the glass panels of these doors. Streaks can show up on large glass panels, so a squeegee can be handy. Clean the frames with warm soapy water and a soft cloth. To prevent cleaner damage, do not use harsh cleaners on uPVC or powder-coated aluminium doors.

Wooden bifold doors require periodic painting or sealing for better upkeep. If your door came pre-treated, follow the recommended re-coating schedule. Also, inspect the hinges, handles and locks a couple of times a year. Tighten any loose screws you see, and lubricate the locks and hinge pivots lightly if they feel stiff. Ensure that the weather seals are unbroken. Replace any loose or damaged gaskets to maintain insulation.

Disadvantages of Bifold Doors

While bifold doors have many advantages, it is important to be aware of their limitations as well. Being informed about them will allow you to plan accordingly and decide if bifolds are truly right for you.

Higher Cost - Bifold door systems tend to be more expensive to purchase and install compared to simpler doors. The hardware, multiple panels and custom fitting all add to the cost. To reduce cost, make sure to get multiple quotes and see if a slightly smaller configuration could work. Sometimes, adjusting the design, like using 3 panels instead of 4 can also save money.

Space for Stacking - When fully open, the folded door panels do take up space. In a large opening with many panels, this stack can be sizable. When there is minimal sidewall area around the door's opening, the stacked panels will likely limit or obstruct the clear opening. Additionally, it might also just look bulky. Be certain to plan your stacking layout so that the panesl stack on the side with more area. Additionally, odd-numbered configurations with a traffic door openings make sure that your rarely need to open the door fully, thus allowing benches or tables to be placed along an adjacent wall.

Complexity of repairs - With multiple panels and tracks, there's more that can go wrong when compared to a single-hinged door. Rollers can wear out, hinges might sag over time, locks might need adjustments. This isn't usually a big issue if you buy quality doors, most operate smoothly for many years. But you should know that is something does fail, you might need to get specialised parts.

Conclusion

Bifold doors look amazing in most decors, and choosing one for your home can be difficult. We trust this guide has helped you decide quickly and within a realistic budget.

At Buildworld, you can trust the brands, the models and explore a huge selection of bifold doors, including glazed and unglazed. If you want them unfinished, so you can finish them to your liking, that's no problem too!. Check out the details on our website today!