Discover the key differences between Bi-fold doors and Sliding doors. A trade-focused guide on installation, costs, trends, and customer satisfaction.
What You’ll Learn:
- The unique advantages of Bi-fold doors and how they transform living spaces
- Why Sliding doors are ideal for uninterrupted views and modern design
- Trade insights on installation ease, customer satisfaction, and profitability
- How to decide between Bi-fold doors and Sliding doors for each project
(Estimated Reading Time: 10-12 Minutes)
Introduction
Bi-fold Doors and Sliding Doors have changed the way homeowners think about light, space, and design. Both are popular across the UK for connecting indoors with outdoors, but they each bring something different to the table. Bi-fold doors give you the dramatic “fully open wall” effect, while Sliding doors maximise views with minimal framing. For trade professionals, knowing these differences is vital — not only for customer satisfaction, but also for profitability. In this overview, we’ll break down what fitters, suppliers, and clients really care about, so you can recommend the right solution every time.
Bi-Fold and Sliding Doors: What’s the Difference?
Bi-fold doors: Also known as folding or concertina doors, Bi-folds consist of multiple panels (or “leaves”) connected by hinges. They fold and stack to one or both sides of the opening along a track, completely clearing the aperture when fully open . This means Bi-fold doors can open up an entire wall, creating an unobstructed pathway between indoors and outdoors – a true indoor-outdoor living experience . Many Bi-fold systems allow one panel to act as a single access door (traffic door), so users can pop in and out without folding all panels every time . Bi-folds can be configured to open inward or outward and fit large or small openings by adjusting the number of panels . However, when closed, each panel has its frame, so multiple panels mean multiple sightlines (frame lines) interrupting the view . Installers should also plan for stacking space – Bi-fold panels need room (either inside or outside) to fold aside when open .
Sliding Patio Doors: Sliding doors feature two or more large glass panels that slide horizontally along tracks. When opened, one panel slides in front of (or behind) another, meaning part of the opening remains covered by a glass panel . You never get a fully open aperture as you do with Bi-folds (unless using advanced designs like pocket sliders that hide panels in a wall). However, modern Sliding doors excel in offering expansive unbroken views – they can use very large glass panels with minimal frame (interlock) widths, so even when closed, you enjoy an almost continuous panorama . They also require no swing or stacking space; the panels glide within the frame, which is a big advantage in tight spaces or where furniture placement is a concern . With fewer moving parts and typically just 2–4 panels, sliders present a clean, contemporary look that complements modern designs well.
Summary: In short, Bi-folds offer the widest possible opening and a dramatic “fully open wall” effect, while Sliding doors provide larger glass panels and slimmer sightlines for better views when closed. Bi-folds introduce more frame lines when shut and need stacking clearance, whereas sliders keep a portion of the opening closed but are space-saving and usually have thinner overall frames . As we’ll explore, these differences influence both customer preferences and installer considerations.
Common Perceptions and Trends in the Trade
Both Bi-Fold and Sliding Doors have seen a surge in popularity in the UK over the past decade. Bi-fold Doors especially became a must-have in many home extensions and renovations, prized for their “wow factor” of completely opening up a living space . In fact, a 2023 industry survey found that 57% of UK homeowners replacing rear doors chose Bi-folds, making them the most popular option, with Sliding patio doors in second place at around 26% . This reflects how mainstream Bi-fold doors have become as a lifestyle product. Homeowners love that Bi-Folds “fold right back, creating a very wide opening” and seamlessly link house and garden, often changing how they use their space . Installers often report that clients are delighted by the transformative effect – more light, better flow, and an indoor-outdoor entertaining area.
However, Sliding Doors are not far behind and are gaining ground. Advances in aluminium framing mean today’s sliders can have impressively slim profiles and larger glass spans than older patio doors . The trend toward minimalistic, contemporary design has made huge “glass wall” style Sliding doors very desirable, especially in high-end projects. Installers note that many customers now ask about those ultra-slim sliders that maximize the view. A leading UK supplier highlights that “the Cortizo Cor Vision is a new breed of Sliding doors that focus on as little visible frame as possible”, achieving sightlines of just 20 mm between panes – over 90% of the door area is glass . Homeowners are wowed by such frameless-look designs, which is why demand for slim sliders is rapidly on the rise .
From a trade perspective, the consensus is that there’s no one-size-fits-all. Experienced fitters know to assess the project specifics: the opening size, customer’s lifestyle, aesthetic preferences, and budget. In smaller openings (or when a full clear opening is needed in a modest space), Bi-folds might be the go-to. For panoramic views and a sleek modern look, large-panel sliders might be preferable. Many installers have noted that Bi-fold doors tend to dominate in family homes and extensions, whereas luxury builds often feature expansive Sliding glass doors for that contemporary look. Nonetheless, both door types are seen as high-value upgrades that can “add wow factor and increase property value,” a key selling point installers can use .
It’s also commonly thought that Sliding doors are cheaper for larger spans because you need fewer big panels, while Bi-folds are cost-effective in smaller configurations. In practice, pricing depends on the specific system and configuration – for example, a high-spec minimal slider can be more expensive than a standard Bi-fold. Trade professionals typically compare quotes for both options when advising clients on cost. In any case, having both options in your product portfolio is wise. This lets you cater to client preferences and site requirements, rather than pushing one solution for all. The remainder of this series will dive deeper into each, but first, let’s consider the decision factors through three critical lenses: the installer’s experience, customer satisfaction, and profitability.
The Fitter’s Angle – Installation and Practicality
From an installer’s viewpoint, the best door is one that fits right the first time and causes minimal headaches on site. Here’s how Bi-folds and Sliders stack up:
- Ease of Installation: Traditionally, a simple two-panel Sliding door was easier to fit than a multi-panel Bi-fold – fewer panels to hang and align, and often no need to fine-tune multiple hinges. Bi-folds, with many moving parts, could be trickier to get operating smoothly. However, modern innovations have significantly improved Bi-fold installation. For example, the Korniche Bi-fold system features a patented pre-gasketed “speed bead” clip-in glazing bead that eliminates the need to manually fit wedge gaskets on site . This saves a lot of time and fiddling during glazing. Similarly, the Smart Visofold 1000 b
- Bi-fold uses “Quick-Glaze” beads and also requires no wedge gaskets . These installer-friendly features mean Bi-folds can now be glazed and fitted faster than older systems, narrowing the gap in ease-of-fit compared to Sliders. On the Sliding side, products like the Cortizo 4700 (enhanced by Korniche) even introduce a “speed bead” for Sliders, touted as the first Sliding door with this technology . So, both categories have options specifically “designed with installers in mind” .
- On-Site Adjustability: Installers appreciate when a product offers tolerances and adjustability, as real-world openings can be imperfect. Bi-folds often come with adjustable hinges and rollers. Notably, the Cortizo Bi-Fold Plus includes an “adjustable jamb as standard for precise installation”, allowing the frame to square up easily even if the aperture isn’t perfectly true . This kind of feature can be a lifesaver in retrofit projects. Sliding doors typically require a very plumb and level installation for smooth operation; some systems offer adjustable rollers or jambs, but generally prep work for Sliders must be spot-on. One advantage for Sliders like the Smart Visoglide Plus is the option for lift-and-slide mechanisms – when engaged, the panel lifts slightly to slide with minimal friction, then lowers to seal. This can make it more forgiving to operate if installation alignment isn’t 100% perfect, and it handles heavy panels more easily.
- Weight and Handling: A practical consideration is moving the units. Bi-fold door panels are typically narrower, so each panel’s weight is less than a huge single Sliding panel. Three installers can carry and hang, say, a 700 mm wide Bi-fold leaf relatively easily. By contrast, Sliding door glass panels can be extremely heavy – especially the 2.5 m x 3 m monsters that systems like Cor Vision allow . Handling such large glass often requires equipment (glass suction lifts, cranes) or extra manpower. The trade-off is you have fewer panels to install overall. Interestingly, some advanced Sliders help here: the Cor Vision product comes with “bonded sashes – no glazing required on site”, meaning the glass is factory-bonded into the frame . The installer doesn’t have to install the glass separately, potentially reducing on-site complexity (though you’re then lifting a fully glazed panel into place). Moreover, the Cortizo 4700/Korniche Slider offers crane delivery for large units – a service to assist fitters with those giant glass panes . For fitters, having supplier support (like crane delivery or pre-glazed panels) can make the difference in safely completing a job.
- Alignment and Adjustments: Bi-folds require careful adjustment so that all panels align, open smoothly, and lock correctly. Too tight or too loose – you’ll be back for service calls. High-quality Bi-folds now come with features to ensure alignment holds: e.g. Korniche Bi-folds have an integrated sill/threshold and robust shootbolt locking , which keeps the frame stable and secure. Sliders have fewer moving parts, but installers need to ensure tracks are clean, level, and that the interlock meet properly for weather sealing. Any flex in a large Slider frame can cause difficulties (this is why premium Sliders use strong profiles to maintain rigidity at large spans).
- Fit-and-Forget: Ultimately, installers want “fit and forget” products – once installed, they perform flawlessly with minimal callbacks. Reliability in the field is as important as ease on install day. Many trade-favorite systems (like the Smart Visoglide Plus) earned their reputation by being “widely known as one of the most reliable aluminium Sliders on the market” . Fewer post-install issues mean a happier, more profitable installer.
In summary, fitters tend to favor whichever system reduces time on site and potential issues. Thanks to installer-centric innovations (pre-fitted gaskets, clip-in beads, adjustable frames), Bi-fold doors have become much quicker to install than in the past . Sliding doors remain straightforward if conditions are right, but dealing with fewer panels that are larger and heavier is a different challenge. A savvy trade professional will choose a supplier like The Trade Village that offers comprehensive support, e.g. dedicated technical support and how-to videos for their products . With proper training and the right tools, both Bi-folds and Sliders can be installed efficiently. The key is matching the product to the project and leveraging any built-in features that make the fitter’s job easier.
Customer Satisfaction – Meeting Homeowner Expectations
When it comes to the end user – the homeowner or client – satisfaction is tied to how well the product meets their needs and desires. Both Bi-fold and Sliding doors can make customers very happy, but in different ways:
- Indoor-Outdoor Lifestyle: Clients often choose these large opening doors to achieve a certain lifestyle vision. Bi-fold doors excel at creating a seamless flow for entertaining and family living. Customers love that Bi-folds “can be fully opened to connect indoors and outdoors seamlessly”, essentially merging patio and lounge into one big space during nice weather . They frequently report that it “literally changes the way they live”, encouraging more gatherings and use of the garden . On the other hand, Sliding doors shine for enjoying the view even when closed. A homeowner with a scenic garden or vista might lean towards Sliders because the large fixed glass panels act like picture windows. They can appreciate nearly uninterrupted scenery year-round thanks to the slim frames . For clients in windy or cooler climates who won’t open the doors daily, Sliders let them “enjoy the natural light and surrounding landscape” while still sheltered . As an installer, understanding your client’s priority – maximum opening vs. maximum view – is crucial for their satisfaction.
- Aesthetics and Design: Both options are aesthetically pleasing but in different styles. Bi-folds offer a contemporary yet somewhat busier look (multiple panels and folding mechanism visible). They can suit modern extensions and even traditional homes (especially with options like heritage-style slim Bi-folds that mimic steel doors). Sliding doors provide a very clean, modern aesthetic – large unbroken glass expanses, minimal hardware visible. In high-end modern architecture, Sliders often are the preferred choice for that sleek look . However, today’s products blur these lines: for instance, the Smart Visofold 1000 Bi-fold comes in a special “steel-look” heritage option with traditional lock stile – great for customers wanting an Art-Deco or industrial vibe with modern performance. Meanwhile, Sliders like the Cortizo Cor Vision can have the frames entirely embedded in surrounding walls and floors for a near-frameless effect, appealing to minimalistic design lovers . Color and finish choices are abundant either way – most systems offer 100+ RAL colours, dual-colour frames, and even textured or metallic finishes . This means as a trade supplier, you can satisfy even the pickiest client’s design scheme, whether they want classic white, the ever-popular Anthracite Grey (which more than half of Bi-Fold buyers choose ), or bespoke colors. Customers will be happy if the door system complements their home’s style and the installer helps guide them to the right aesthetic options.
- Functionality & Convenience: Imagine the customer living with the door day-to-day. Each type has its functional perks. Bi-folds offer flexibility – open one panel for a quick step outside or fold back all panels for a party. Many homeowners appreciate having a traffic door in a Bi-fold for daily use, effectively like a normal back door. Sliding doors offer ease of use – especially for those who might find folding multiple panels cumbersome. A well-engineered Slider glides with a fingertip push despite large glass, which elderly or disabled users may find more manageable (versus handling swinging fold panels). Clients with young children sometimes prefer Sliders with a soft-close or damped mechanism – and indeed the Smart Visoglide Plus has a “soft-close option to avoid trapped fingers”, a big plus for safety . One limitation customers accept with Sliders is the narrower passage when open (for example, a two-panel Slider only opens 50%, which might feel like a tight squeeze when moving furniture). Bi-folds provide a nearly full-width opening which is very convenient for moving large items or just allowing crowds to flow in/out during gatherings.
- Performance (Thermal, Security, Maintenance): Homeowners expect these large doors to be just as secure and energy-efficient as any other part of their home. Both Bi-fold and Sliding systems from reputable suppliers are engineered for high performance. For instance, the Cortizo Bi-Fold Plus achieves a 1.3 U-value with double glazing (and down to 0.8 with triple) – excellent insulation for such a door . Sliding doors can also be very thermally efficient; fewer panels can mean fewer gaps, and many Sliders use thermal break profiles and high-spec glazing. On security, customers often ask if large glass doors are safe – trade installers can reassure them by choosing products that are PAS 24 certified and have robust locking. The Trade Village’s range checks this box: e.g. Cortizo Bi-Fold Plus and 4700/Korniche Slider come PAS24 Certified as standard . Features like multi-point locks, interlocking shoot-bolts on Bi-folds, and anti-lift devices on Sliders keep intruders out. Maintenance-wise, clients worry about things like “Will the tracks get dirty or the doors drop over time?” Modern systems use high-quality rollers and hardware. Bi-folds might need the occasional hinge lube or adjustment (especially wooden ones in past, but with aluminium frames and proper installation, this is minimal). Sliders need their track kept clear of debris – something the installer should advise the homeowner. Overall, when an installer provides a quality product and a proper briefing on care, customers tend to find these doors trouble-free. Many are delighted to find that, for example, aluminium frames are virtually maintenance-free (no painting, won’t warp) and that top brands offer long warranties (10 years is common) – giving peace of mind.
In essence, customer satisfaction boils down to delivering on the promise: If they wanted the “grand opening” effect, a smoothly operating Bi-fold that indeed opens and closes easily will thrill them. If they prioritized the panoramic view, an ultra-slim Slider with effortless glide and tight weather-seals will meet their expectations. As installers, guiding customers to the right choice and then installing it to a high standard (with no call-backs for fixes) is the recipe for happy clients who will recommend you to others.
The Money Maker – Profitability for Installers
Let’s talk business. For trade installers and companies, Bi-folds and Sliding doors are significant ticket items. Winning these jobs and executing them efficiently can be lucrative. Here’s how each door type factors into the money-making equation:
- Job Pricing and Margins: Bi-fold door installations often involve more panels and hardware, which can mean higher material costs than a simple two-panel Slider. However, customers are generally willing to pay a premium for Bi-folds because of the high-perceived value and transformational effect on the home. Many installers report healthy margins on Bi-fold projects, especially when purchasing at trade discounts and installing in a day or two. Sliding doors, particularly high-end slim Sliders, also command premium prices – sometimes even higher than Bi-folds for the same opening, depending on spec. For instance, a cutting-edge minimal frame Slider with bonded glass and special tracks can be costlier to source. But again, those are premium offerings clients pay top dollar for. Either way, being able to supply both types lets you cater to both mid-range budgets and luxury projects, maximizing your potential market. As noted, Bi-folds have been extremely popular, representing more than half of rear door renovations , so there’s strong market demand you can tap into. Sliders are the second-most popular and growing, so offering a modern Slider like the ones The Trade Village stocks (Cortizo and Smart systems) means you won’t miss out on that segment.
- Efficiency = Profit: Time is money in installation. A key part of profitability is how quickly you can complete the job (without issues) and move to the next. This is where the earlier discussion on installer-friendly features becomes financially important. If using a product like Korniche Bi-fold with the “speed bead” that saves significant installation time, you effectively lower your labor cost per job . An installation that might have taken two days can sometimes be done in one long day with a well-designed system – doubling how many jobs you can fit in a month. Moreover, “right first time” installations reduce costly callbacks. Every service visit to adjust a door eats into profit. Systems known for reliability (e.g., Smart Visoglide’s reputation for engineering “perfection” ) mean you spend less time troubleshooting later. Also, consider delivery and logistics: a product available on a quick turnaround can keep your pipeline flowing. The Trade Village, for example, offers stock colours delivered in as little as 10 working days – which is a selling point to customers and allows you to schedule the install sooner (fast project completion, faster payment). They also provide nationwide delivery and even options like trade finance for large orders . Such support improves your cashflow and scheduling, indirectly boosting profitability.
- Value-Added Upsells: Both door types come with plenty of upsell opportunities that can increase your profit on each project. Integral blinds inside the glazing are a very popular add-on that many customers are willing to pay extra for. Happily, most systems in The Trade Village range – from Korniche Bi-folds to Smart Visoglide and Cortizo – offer “integral blinds option” in the sealed units . Selling an upgrade like integrated blinds (which provide shade and privacy without external blinds or curtains) can add margin. Triple glazing is another: a customer focused on energy efficiency might upgrade from double to triple glazing in their doors, which increases the order value (Cortizo Bi-Fold Plus boasting 0.8 U-values with triple glazing is a great talking point ). Custom colours or finishes can also raise the price; while standard Anthracite or White might be base cost, a bespoke RAL or dual-colour frame could come at a premium (with over 200 finishes available on Smart and Cortizo systems, you have that flexibility ). As an installer, partnering with a supplier that can quickly quote these options online 24/7 (like TTV’s online portal ) helps you respond to customer changes fast and capture those upsells.
- Differentiation and Customer Trust: Finally, your choice of product affects your reputation and future referrals – which are the best free marketing you can get. By supplying high-quality doors that delight customers and rarely cause issues, you build a portfolio of happy clients. Homeowners will recommend the installer who gave them that gorgeous, smooth Bi-fold or Slider that all the neighbors envy. Conversely, an installer who cuts corners with a subpar product to save a few pounds upfront might face complaints or warranty issues that cost far more later. Working with a trade supplier like The Trade Village means you get proven products from leading manufacturers (Korniche, Smart, Cortizo are respected names) but at competitive trade pricing . They explicitly “source the best products in the market direct from leading manufacturers, and share volume discounts” with trade customers . This allows you to offer top-tier doors at prices that win jobs, and keep a healthy margin. Additionally, TTV’s dedicated support team and account managers back you up if there’s any issue – meaning you’re never left alone to solve a tricky problem. That support can save you money and time, preserving your profit on a job if anything unexpected happens.
In short, both Bi-folds and Sliding doors can be strong money-makers for installers when handled right. By choosing the right product for the project, utilizing trade-friendly features to reduce install time, upselling valuable options, and leaning on a reliable supplier, you can increase your revenue and deliver great results. The next parts of this series will delve into each category (Bi-folds and Sliders) in detail, examining the specific offerings from The Trade Village and how they meet the needs of fitters, customers, and business growth.
✅ Explore our Bi-fold Doors: Bi-fold Doors at The Trade Village
✅ Explore our Sliding Doors: Sliding Doors at The Trade Village
✅ Book a call to discuss how aluminium doors can fit into your portfolio.
✅ Open an account today and start selling the future of entrance design.
Browse Our Articles
- Bi-folds vs Sliding Patio Doors
- Sliding Door Options from The Trade Village
- Why should you buy Smart Bi-folds through the Trade Village?
FAQs
Are bi-fold doors better than sliding doors?
It depends on the project. Bi-fold doors are ideal when you want a fully open wall, while sliding doors give you larger glass panels and minimal sightlines.
Do sliding doors cost less than bi-fold doors?
Sliding doors can be more cost-effective for large openings since they use fewer panels. However, premium slimline sliders can cost more than standard bi-folds.
Which is easier to install, bi-fold doors or sliding doors?
Traditionally, sliding doors were simpler, but modern bi-fold systems now come with installer-friendly features that make them quicker and easier to fit.
Which door type is more energy-efficient?
Both options can meet high thermal standards. U-values depend on the system and glazing, but aluminium bi-fold doors and sliding doors from trusted brands can perform equally well.
Do bi-fold doors or sliding doors add more value to a home?
Both add value by improving natural light and modernising living spaces. Bi-folds often impress with the “wow factor,” while sliders are popular in contemporary luxury homes.