Sliding Doors vs Folding Doors

Sliding doors vs folding doors — here is what South African buyers need to know, supplied direct by Coetz™ Glazing.

Choosing between aluminium sliding doors and aluminium folding doors (also called bi-fold or stacking doors) is one of the most common decisions when opening up a living area to a patio, garden or entertainment space. Both are large glazed aluminium doors made to order, both use Coetz™ standard 6.38 mm Clear Laminated Safety Glass, and both let in plenty of light — but they open very differently and suit different budgets, openings and lifestyles. This guide explains when each option makes sense so you can order the right door with confidence.

Quick comparison

Feature	Sliding Doors	Folding Doors
How it opens	Panels slide along a track and stack behind each other	Panels concertina and fold flat to one or both sides
Maximum clear opening	Around 50–65% of the door width	Up to about 90% of the door width
Everyday use	Excellent — slide one panel to walk through	Good — add a single hinged access panel for daily use
Cost	More budget-friendly per metre	Higher (more panels, hinges and hardware)
Threshold	Low-profile track available	Low-profile track available
Maintenance	Low — keep tracks clean	Low–medium — more moving parts and seals
Best for	Everyday patios, apartments, tighter budgets	Entertainers wanting a fully open, seamless space

Opening & space

The biggest practical difference is how much of the opening you can actually clear. Folding doors concertina and fold flat against the wall, opening up to roughly 90% of the aperture — ideal when you want the wall to “disappear” and merge indoor and outdoor spaces for entertaining. Sliding doors stack panels behind one another, so a portion of the opening always remains glazed. For a two- or three-panel slider that typically means 50–65% clear. If an uninterrupted, wide-open threshold is the priority, folding wins; if you mostly want light, a view and easy everyday access, sliding is more than enough.

Cost

Sliding doors are generally the more cost-effective choice per metre because they use fewer panels, hinges and locking points. Folding doors carry more hardware — every panel has hinges, rollers and seals — so they cost more for the same opening width. Both are priced online at Coetz™ by exact size, configuration and glass specification, so you can compare real prices for your opening before deciding.

Everyday use & maintenance

For day-to-day coming and going, sliding doors are hard to beat — you simply slide one panel. Folding doors fold the whole wall away, which is wonderful when hosting but less convenient for a quick trip to the garden, so most folding installations include a single hinged “traffic” panel for daily use. Maintenance is low for both: keep the bottom track clean and clear of grit, and wipe seals occasionally. Folding doors have more moving parts, so there is marginally more to look after over time.

Advantages of sliding doors

• More budget-friendly for the same opening width
• Effortless everyday access — slide a single panel
• Fewer moving parts, so very low maintenance
• Large uninterrupted glass panes for maximum light and view
• Great for apartments and patios where panels must stack, not swing out

Advantages of folding doors

• Opens up to ~90% of the aperture for a near-seamless indoor-outdoor space
• Ideal for entertaining and open-plan living
• Flexible configurations — fold to one side or split to both
• A built-in hinged access panel gives everyday convenience plus full opening when needed
• A striking architectural feature for modern homes

Which should you choose?

• Best for tighter budgets: sliding doors — more opening per rand.
• Best for entertaining & open-plan living: folding doors — the whole wall opens.
• Best for apartments & everyday patios: sliding doors — simple, space-saving.
• Best for wide openings you want fully clear: folding doors.
• Best for low maintenance: sliding doors — fewer moving parts.

Whichever you choose, both are supplied made-to-order in your exact size, colour and glass specification. If you are unsure which suits your opening, send us your measurements for a no-obligation quotation.

Sliding doors vs folding doors: the clear opening

This is the difference that decides most projects. A sliding door always leaves at least one panel in the opening, because the panels stack behind one another rather than moving out of the way. A folding door concertinas and stacks against the reveal, so almost the whole aperture is freed.

In the sliding doors vs folding doors comparison that translates to roughly 50–65% of the width on a slider against up to about 90% on a folding door. On a 4 m opening that is the difference between roughly 2.4 m of clear passage and around 3.6 m.

Whether that matters depends entirely on what you are opening up, and it is the first thing to settle in any sliding doors vs folding doors comparison. For a doorway people walk through, it does not. For a patio where the brief is to make the wall disappear when entertaining, it is the whole point.

Sliding doors vs folding doors: cost

Sliding doors are more budget-friendly per metre, and the reason is mechanical rather than commercial. A folding door has more panels, more hinges, more hardware and more seals in the same opening, and every one of those is a component to manufacture and fit.

The sliding doors vs folding doors cost gap widens as the opening gets wider, because a wider slider mostly needs bigger panels while a wider folding door needs more of them. If budget is the deciding constraint, that relationship is worth knowing before you settle on a width.

Both sides of the sliding doors vs folding doors choice are made to order and both are currently supplied at 20% off. Send the opening size and configuration for an exact figure rather than working from a per-metre estimate.

Sliding doors vs folding doors: everyday access

This is where the comparison often reverses. A slider is excellent for daily use — you push one panel and walk through, and the rest of the door never moves. A folding door has to be folded back, which is more effort for a quick trip outside.

The standard answer is a single hinged access panel within the folding door, so one leaf opens conventionally for daily traffic and the whole assembly folds back only when you want it open. Anyone weighing sliding doors vs folding doors for a busy family entrance should specify that panel from the start.

Sliding doors vs folding doors: weather and sealing

On sliding doors vs folding doors, more moving joints means more seals. A folding door has a sealing line at every panel junction, where a slider has far fewer. Both perform well when correctly specified and maintained, but the folding door has more places that eventually need attention.

For exposed elevations — coastal, high-wind or west-facing sites taking driving rain — that difference is worth weighing in the sliding doors vs folding doors decision. It is not a reason to avoid folding doors; it is a reason to keep the seals maintained.

Sliding doors vs folding doors: security and glass

Both use Coetz™ standard 6.38 mm clear laminated safety glass. Laminated glass carries an interlayer that helps hold the pane together if it breaks, which is the relevant property on a large ground-floor opening.

Security on either system comes down to the locking and how the panels meet the frame rather than to the sliding doors vs folding doors choice itself. Specify the locking arrangement deliberately on both.

Sliding doors vs folding doors: track and threshold

Low-profile tracks are available on both sides of the sliding doors vs folding doors comparison, which matters for level-threshold designs and for wheelchair or trolley access. The practical difference is what the track has to carry: a slider runs a smaller number of heavier panels, a folding door runs more, lighter ones.

On both, the track is the part that rewards cleaning. Grit in a track is the single most common cause of heavy running, and it applies equally on either side of the sliding doors vs folding doors comparison.

Sliding doors vs folding doors: which suits which opening

• Narrow openings under about 2.4 m. A slider almost always makes more sense — a folding door in a narrow opening spends its advantage on panels you do not need.
• Standard patio openings, 2.4–3.6 m. Genuinely a choice. Daily use favours sliding; entertaining favours folding.
• Wide openings over about 4 m. This is where folding doors earn their cost, because the clear-opening advantage becomes dramatic.
• Apartments and tight interiors. Sliding, because nothing needs stacking space against the reveal.
• Serveries and bar counters. Folding, where the whole aperture needs to clear.
• High-traffic family entrances. Sliding, or folding with a hinged access panel specified.

If your opening does not fall neatly into one of those, send the dimensions and describe how the space is used. The sliding doors vs folding doors answer is usually obvious once the daily use is described.

Measuring for either system

Both are manufactured to the sizes you supply, so the measurement matters more than the sliding doors vs folding doors choice does.

• Measure the structural opening, not an existing frame.
• Check for square — width at top, middle and bottom, height at both sides and the centre.
• Record the finished floor level, which governs the threshold detail on both systems.
• Note the stacking space — folding doors need clear reveal to stack against; sliders need panel-width run behind.
• Allow installation clearance. A door made to the exact opening size will not fit into it.

Getting that right is more consequential than the sliding doors vs folding doors decision, because a well-chosen door in a mismeasured opening is still the wrong door.

Sliding doors vs folding doors: the short answer

Choose sliding if the door is used daily, the budget is the binding constraint, the opening is moderate, or the interior has no room to stack panels. Choose folding if the brief is to open the wall as fully as possible, the opening is wide, and the door is used for entertaining more than for daily traffic.

If you are still undecided after all of that, the honest resolution to sliding doors vs folding doors is to send us the opening dimensions and a description of how the room is used. Both are supplied direct, made to order, ready for installation by your own builder or contractor.

Panel configurations on each system

Both systems are made to order, and the panel count is what turns an opening width into a specific product. It is worth knowing the options before you settle the sliding doors vs folding doors question.

• Sliding doors are built in 2, 3, 4 and 6-panel layouts. Standard configurations run from a simple two-panel OX up to six-panel arrangements, and multi-track systems let every panel slide rather than leaving fixed lights.
• Folding doors run from 3 to 10 panels, folding to one side or splitting to both. More panels mean a wider opening cleared, and also more hinges, more seals and more cost.
• Compact folding options cover smaller openings in 2 and 4-panel layouts, including centre-split arrangements for serveries and French-style openings.

Panel count also affects the stacking space. A ten-panel folding door stacks a substantial depth against the reveal, and that stack has to go somewhere the furniture is not. Factor it into the sliding doors vs folding doors decision rather than discovering it after installation.

Still deciding between sliding doors vs folding doors?

Almost nobody regrets either system on its own merits — the regrets come from choosing against how the room is actually used. A folding door bought for a doorway that gets used forty times a day becomes an irritation. A slider bought for a patio that was meant to open completely never quite satisfies.

So the sliding doors vs folding doors question is really a question about behaviour rather than about product. Watch how the space is used for a week before you commit. If people are walking through it constantly, buy the slider. If the door is closed most of the time and thrown open when guests arrive, buy the folding door and enjoy what it does.

Either way, send us the structural opening width and height, a photograph, and one line about how the space is used. We will tell you which way the sliding doors vs folding doors comparison falls for your opening, and quote both if it is genuinely close. Both are supplied direct, made to order, ready for installation by your own builder or contractor.

Shop & related

Sliding Doors Vs Folding Doors

Coetz™ Glazing designs and manufactures to your sizes and supplies direct — send your opening dimensions for a quotation. Aluminium sliding and folding doors are supplied ready for installation by your own builder or contractor.

Helpful next steps: How to Measure Aluminium Doors · All Aluminium Doors · Safety Glass Explained · Warranty.

Still weighing sliding doors vs folding doors? Contact Coetz Glazing for advice on the right choice for your space, plus options, pricing and lead times.