Supply-Only or Supply-and-Install? Comparing the Real Cost of Bi-fold Doors

Supply-Only vs Supply-and-Install: The Real Cost Difference for Bi-fold Doors

If you’re comparing supply only bi-fold doors against a full supply-and-install package, the honest answer is that the right choice depends on who’s doing the fitting, not just the headline price. At Express Bi-Folds Direct we supply DIYers, small builders and developers with the same aluminium bi-fold systems used across the wider Express range, without the cost of a fitting team attached.

This guide breaks down what you actually pay for with each route, using our current stock XP10 bi-folding doors pricing as a working example, so you can weigh up whether self-fitting or hiring a professional makes more sense for your project.

What supply-only bi-fold doors cost

Supply-only means exactly that: you’re paying for the door system itself, manufactured to your opening size and specification, delivered to your address. There’s no fitting team included, so the price reflects the hardware, aluminium, and glazing rather than labour.

Our stock XP10 bi-folding door range gives a useful starting point, since these are standard sizes held for fast dispatch rather than made-to-order:

Larger configurations and the XP10 Steel Look range sit above this, but the pattern holds: panel count and size are the biggest drivers of the supply-only price, not fitting. Supply-only is especially popular for extensions, garage conversions and garden room installations, where builders often prefer to fit the doors as part of a wider project. If you want the full cost breakdown across sizes and glazing options, our bi-fold doors cost guide covers that in more detail.

What supply-and-install typically adds

Professional installation is usually priced separately from the doors themselves, and it’s where a lot of the cost variation in a supply-and-install quote comes from. In 2026, fitting a bi-fold door typically costs anywhere from £550 to £1,000 or more, depending on the scope of the work.

A straightforward installation like fitting an XP10 into a newly formed opening, sits at the lower end. The price climbs when the project involves:

Supply-only vs supply-and-install: which works out cheaper?

On paper, supply-only is always the lower upfront cost, since you’re not paying for labour. A 3-panel XP10 bi-fold door at £2,067.50 supply-only plus a straightforward £550 fitting job comes to roughly £2,600, well inside the £2,000-£7,000 range our full bi-fold doors cost guide quotes for supply-and-standard-install.

The saving only holds up if the person fitting the door, whether that’s you, a competent DIYer, or your own builder, gets it right the first time. A poorly fitted bi-fold door can develop draughts, alignment issues or water ingress, and putting that right afterwards can easily cancel out what was saved on installation. For anyone confident in the fit, our installation guides are a good starting point before you order.

Supply-only tends to work best for small builders and developers with their own fitting capability, and for confident DIYers tackling a straightforward opening. It’s often paired with our pre-made stock range, where selected doors are dispatched within 5 working days, useful when a project timeline is tight.

Expert Insight from Express Bi-Folds Direct Managing Director Steve Bromberg

Steve Bromberg, Managing Director at Express Bi-Folds Direct, has worked at the forefront of the aluminium bifold door industry since 2007. With products manufactured at the company’s 200,000 sq. ft Leeds facility, he brings direct experience in aluminium glazing, product quality, lead times and the practical needs of UK homeowners, builders, and trade customers.

“We get asked a lot whether supply-only is a false economy,” explains Steve. “It isn’t, provided the person fitting the doors knows what they’re doing.”

“A competent builder or a confident DIYer can save a meaningful amount by handling installation themselves, and our stock XP10 range is designed with that in mind. Where it gets more complicated is structural work, wide spans, or anything beyond a straightforward replacement opening, and that’s when the cost of getting it wrong starts to outweigh what you saved on the doors.”

“The key is being honest with yourself about the scope of the job before you decide which route to take.”

Which option is right for your project?

If your opening is straightforward, your fitter is experienced, and you want to keep costs down, supply-only bi-fold doors from our XP10 range are a solid option, backed by our 10-year guarantee regardless of who fits them. If the project involves structural changes, an unusual opening, or you’d simply rather have it handled end to end, our sister brand Express Bi-Folding Doors offers a full bespoke supply-and-install service, including showroom visits, and their team can be reached via their contact page.

Whichever route you choose, check our FAQs for common questions on ordering, lead times and specification before you commit.