Bifold vs Sliding Patio Doors: Which Should You Choose

When you are opening up the back of the house to the garden, it usually comes down to two choices: bifold patio doors that concertina back to one side, or sliding doors that glide past each other. Both look fantastic, both let in loads of light, and both have loyal fans. The right one for you depends on how you want to use the space.

This guide compares bifold and sliding patio doors honestly, on the things that actually matter: views, opening, space, security and cost. By the end you should have a good idea which suits your home.

The quick answer

If you want the widest possible opening that folds almost completely out of the way, bifold patio doors are hard to beat. If you want the biggest, clearest view when the doors are shut and a sleek, minimal look, sliding doors usually win. Most of the decision comes down to that trade-off.

Let us break it down properly.

The view when the doors are closed

For most of the year, patio doors are shut, so how they look closed matters a great deal.

Sliding doors use fewer, larger panes with slim frames, which means less frame and more glass. When closed, you get big, uninterrupted views of the garden. If the outlook is the star of the show, sliding doors show it off best.

Bifold doors are made up of several narrower panels, so there are more frames breaking up the view. Modern bifolds have slimmed these down a lot, but you will still see more vertical lines than with a slider. If you want an idea of both in the flesh, our sliding and bi-fold door range covers the options side by side.

The opening

This is where bifolds shine.

Bifold patio doors fold back like a concertina, stacking neatly to one or both sides. That means you can open up almost the entire span, effectively removing the wall between inside and garden. For summer parties, indoor-outdoor living and a real sense of bringing the outside in, nothing quite matches it.

Sliding doors open by gliding one panel behind another, so you can typically open around half to two thirds of the span at most. That is still a generous opening, plenty for everyday use, but you never get the completely open wall that bifolds offer.

So if the wow moment of throwing the whole wall open matters to you, bifolds are the answer. If you mostly want light and a good sized opening for coming and going, a slider is more than enough.

Space to consider

Think about where the doors go when open.

• Bifolds need somewhere for the folded panels to stack. This can sit inside or outside, but either way the stacked panels take up a bit of room at the side and can intrude slightly on a patio or the room.
• Sliding doors slide flat against the adjacent glass or into the wall, so they take up almost no space when open. That makes them a good pick where space is tight or you do not want panels stacking into the room.

Security and efficiency

Both bifold and sliding patio doors, when well made, offer excellent security and insulation. Modern versions use multi-point locking, toughened glass and thermally broken aluminium frames, so there is little between them on this front. What matters far more is the quality of the door and the standard of the installation than the style itself.

Both also come double glazed as standard, keeping the room warm in winter, which is important given how much glass you are dealing with.

Cost

As a rough 2026 guide, both bifold and sliding patio doors are a bigger investment than a standard back door, typically ranging from around 3,000 to 8,000 pounds or more supplied and fitted, depending on the size of the opening, the number of panels and the specification. Very large or premium slimline sliders can run higher still.

Neither is dramatically cheaper than the other across the board. Cost tends to track size and quality more than the choice of bifold or slider. Because prices vary so much with the opening, the sensible move is to get a quote for your exact space. You can ask us for a free quote and we will measure up and price both options if you want to compare.

Which should you choose?

Here is the honest summary:

• Choose bifold patio doors if you want to open up the whole wall to the garden, love the indoor-outdoor feel and do not mind a few more frames in the view when closed.
• Choose sliding doors if you want the clearest possible view when shut, a sleek minimal look, and a design that takes up no space when open.

There is no wrong answer. Both will transform a room and flood it with light. It really comes down to whether the open span or the closed view matters more to you.

FAQs

Are bifold or sliding doors better for small spaces?

Sliding doors tend to suit smaller spaces because the panels slide flat and take up no room when open, whereas bifolds need somewhere for the folded panels to stack. For a tight room or patio, a slider often works better.

Do bifold doors let in more light than sliding doors?

When open, bifolds create a wider clear opening, but when closed sliding doors usually let in more uninterrupted light because they have fewer, larger panes and slimmer frames. So it depends whether you mean open or closed.

Are sliding patio doors more secure than bifolds?

Neither is inherently more secure. Both modern bifold and sliding doors use multi-point locking, toughened glass and strong frames. Security comes down to the quality of the door and the standard of the installation rather than the style you pick.

Which is more expensive, bifold or sliding doors?

They are broadly similar, and cost is driven more by the size of the opening and the specification than by the style. Large or premium slimline sliders can be the priciest option, but for most openings the two are comparable. Get a quote for your exact space to compare.

Ready to open up your home to the garden? Download our latest brochure to see both styles, or book a free quote and we will help you decide at your home.