Bi-folding Doors vs Sliding Doors: Differences and Benefits

Choosing the right door and configuration for your project is essential. Especially if you want to meet client expectations, provide lasting value to a property, and avoid costly mistakes and alterations.

Sliding doors and bi-fold doors both offer many design and functional advantages. From panoramic views to excellent thermal efficiency, they are customisable and enhance a space architecturally.

However, there are some drawbacks to each product, but what are they? What are the pros and cons of each one? Don’t worry, we’ve put a handy guide together with all the information you need.

We take a look at:

Bi-folding Doors Pros and Cons


Thermal performance

Bi-fold doors offer exceptional levels of thermal performance in comparison to sliding doors of equivalent size. Aluminium bi-fold doors manufactured and fitted by a reputable supplier will achieve U-Values as low as 1.19 W/m2K when calculated as a CEN Standard door. 

In particular, PURe® doors deliver exceptionally high levels of thermal protection. PURe® utilise an integrated thermal break manufactured from expanded polyurethane (PUR). This advanced technology creates a protective layer, preventing any conductive heat loss. 

Bi-fold doors meet current and future building regulations and energy efficiencies standards whilst also providing optimal performance and sleek aesthetics. A double or triple glazed finish is available too. This enhances the thermal and acoustic insulation levels of the door whilst contributing to the excellent performance levels overall.

Versatility and bespoke configurations

Your clients like options – and bespoke configurations are always a good selling point. After all, you want to be able to meet demand, whilst also providing the most accurate and impressive outcome.

Depending on the manufacturer and supplier you choose, you’ll be spoilt for choice. Bi-fold doors are customisable and come in a range of configurations to suit all demands and expectations. 

They can suit a range of setups, preferences, apertures, and colour preferences. Double glazing, triple glazing, dual or singular colourway, threshold customisations and more.


Bi-folding doors are compact and offer a crucial advantage to properties that require space-saving solutions without compromising the aesthetic appearance and product performance. 

A bi-fold door slides and folds simultaneously into a concertina compact storage unit. They don’t restrict any entranceway or impact any panoramic views. In fact, they open up a space and provide excellent access to the outdoors.

To improve functionality, some designs include a traffic door. This incorporates a conventional swinging door into a bi-fold configuration. These are used for quick access regularly, without having to move and fold the leaves every time access to the outdoors is needed. 

sliding doors do have limitations. Once opened, they only offer limited access to the outdoors, and they don’t fold away. Some sliding door options only open with half or two-thirds clear opening – restricting access to the outdoors.



Precision engineered and high-quality performance, it shouldn’t come as a surprise that bi-fold doors are significantly higher in price than sliding doors.

If you choose a reputable and expert supplier and manufacturer, you’ll get what you pay for. Aluminium bi-fold doors are built to last, and they require minimal maintenance. With that said, it’s worth shopping around and seeing the different prices on offer – even if your clients are operating under a small budget.

Aluminium bi-fold doors are an investment and can increase the overall value of a property. One of the selling points of bi-folds is that they last up to 40 years! This is incredible. So, although the price point is higher, it’s worth outlining the priorities and expectations alongside budgets.

Access and traffic doors

Although it’s not a big flaw in the design, it could still cause significant issues and be a deciding factor in choosing bi-fold doors.

Bi-fold doors can restrict access to the outdoors, letting the elements from the outdoors in. To use the bi-fold door, you have to fold all the leaves together to gain access outside. This allows air in and isn’t ideal in the cooler months.

However, with the addition of a traffic door, this isn’t a problem, and it can allow easy movement in and out. Again, another vital consideration to make which could impact the overall cost.

Sliding Doors Pros and Cons


Slim sightlines and bespoke configurations

Sliding doors come in a range of configurations, colours and bespoke customisations. No matter the client’s expectations, if you choose a trusted supplier and manufacturer, you’ll be delighted to know that you can achieve a bespoke outcome every time. They are available pre-finished, in an almost unlimited range of colours – both inside and out. 

Sliding doors offer some of the slimmest sightlines, providing uninterrupted views of the outdoors without compromising acoustic and thermal performance. 

They provide panoramic views and an impressive architectural statement whilst remaining safe and secure. High-quality aluminium sliding doors come with built-in protection and excellent multi-point locking systems. Again, these can be customised to suit individual requirements and expectations.

Robust and durable

Sliding doors are typically robust, durable and built to last. Although they do require some maintenance, they are strong and protect against the outdoor elements. 

However, the quality and durability of a sliding door will depend on the manufacturer, supplier and fitter you use. These are essential factors in the longevity of a product and shouldn’t be overlooked in the consideration process.

Sliding doors are fitted with a multi-locking system, operated only from the inside, preventing intruders from lifting the doors of the threshold. 

Space saving

One of the most significant advantages of sliding doors is their excellent space-saving qualities. Some sliding doors operate on one singular threshold, taking up less space than bi-folding doors. No extra space is required, and no door arc is needed. They slide and open one track, each leaf sliding over another. 

If size and space are a priority for your client and they’re still wanting to prioritise quality, panoramic views and architectural beauty – sliding doors can provide just that.

As an example, the PURe® Slide aluminium door range is high-performance, innovative and sleek. The sliding door range meets budget, configuration and aesthetic expectations. Both inline slide and lift and slide configurations are available as a slimline version (PURe® SLIDE SL) and 50mm interlock sightline.


Traffic limitations

Sliding doors do have their limitations, like bi-folding doors. Sliding doors that operate on a triple track threshold allow the option to open two-thirds of the door only, with one fixed leaf.

Whereas bi-folding doors offer the option of a traffic door, sliding doors don’t provide this luxury. Again, causing restrictions and limited access to the outdoors.

Another consideration that needs to be made – larger sliding doors in exposed areas, may need the addition of a strengthening bar for added support, this can contribute and add thickness to the overall sightlines.

The Verdict

Every door and product on the market will come with its own individual set of advantages and disadvantages. Whereas one thing may be deemed negative by one client, it may not be a problem for another. Choosing the correct door for the project usually depends on personal preference, expectations, budget and overall aesthetic appeal. 

Aluminium bi-fold doors and sliding doors have been growing in popularity within the sector for many years now. And it’s for good reason too. As outlined, they provide some incredible benefits whilst also providing an architectural statement.

Many flaws within the doors have been addressed, and with modern-day technology and innovation, new configurations and customisations are being developed, right now. Bi-fold and sliding doors are bigger, sleeker, and better than ever before. 

At FrameX, we’re aluminium window and door specialists with quality, functionality and leading innovation at our core. If you’re in the trade, are a builder, architect or property developer, we can help you meet project deadlines and budgets efficiently, and exceed client expectations.

Now you know the pros and cons of bi-fold and sliding doors, there may be a few questions that have cropped up. Not to worry, our expert team are always on hand to help answer queries you have. Don’t hesitate to get in touch with us today!

In the meantime, a few of your bi-fold door queries may be here. Check out our previous articles for more information, industry insights, and product expertise.

Compare Bi-fold and Sliding Doors for Yourself at Our Showroom

Want to see some of the products in action and speak to our specialist team? Come along to our showroom in Rossendale Valley and we’d be happy to help.

Nothing beats seeing the real thing, book your free appointment today and we’ll look forward to seeing you soon.

New Building Part L Regulations June 2022: What You Need to Know

The clock is ticking and the newly updated building regulations are about to begin

If you’re a designer, builder, installer or architect – you’ll need to understand the new regulations to ensure your projects are fully compliant, and you’re prepared for the future.

We’ve compiled all you need to know here and some solutions ahead of time.

We will cover all of the following:

What is an Approved Document?

The approved documents are supplied by the Secretary of State and give practical guidance on common building situations and how to meet the requirements of the Building Regulations 2010 for England.

Each approved document covers the requirements of the building regulations relating to different aspects of building work and applicable legislation.

As well as handy guidance and tips, some of the approved documents also include provisions that must be followed. These are sometimes regulations, methods of test or calculations that are approved by the Secretary of State. 

What Are Part L Regulations?

With so much information circulating in the industry, it can be difficult to know what’s important and what isn’t. We’ve covered some of the key points below.

  • Part L of the new building regulations for England covers the ‘conservation of fuel and power’. These place emphasis on the heat loss through walls, lintels, floors and roofs.  
  • The Part L of the regulations sets the new standards for the energy performance and carbon emissions for new build dwellings or commercial buildings. The regulations are divided into four documents, each covering the different and newly updated legislations.
  • The new changes are part of the project to deliver zero carbon homes. This is in support of the UK’s bid to deliver net-zero carbon emissions by 2050. Buildings currently contribute to 40% of the UK’s total energy usage. So, new building regulations will reduce percentages and make great steps forward to carbon zero goals.
  • All new homes must produce 31% less CO2 emissions. This is less than what is currently outlined in the present Part L regulations.
  • New non-domestic builds will need to produce at least 27% fewer CO2 emissions.
  • Domestic and non-domestic builds must have a max flow temperature of 55°C.
  • Updated windows and doors in property extensions or existing homes can’t have lower performance than the products they are replacing.
  • ‘Primary energy’ will be used to measure the efficiency of a building’s heating. All new dwellings must have an Energy Assessment (SAP) completed to demonstrate compliance with the new regulations.
  • The expected U-value for new domestic builds will be a U-value for walls of 0.18W/m², 1.4 (Window Energy Rating Band B) for windows and roof lights, and 1.4. for doors.
  • Non-domestic builds should have a U-value of 0.26W/m² K for walls, and the majority of new windows and curtain walls must achieve 1.6.
  • And more… 

For more information, check out the published Approved Document L.

aluminium bifold doors

When Will the Changes Affect Me and What Are the Transitional Arrangements?

Key points to consider:

Compliance will be different from the standards required in Scotland, Wales and Northern Ireland.

If a building notice, initial notice, or full building plans have been submitted to a local authority before 15th June 2022, and the building doesn’t commence until the following year, the previous legislation is permitted.

Anything after this date should adhere to the new standards and legislation.

“In some cases, applications will be in respect of a number of buildings on a site, for example, a number of houses. In such cases, it is only those individual buildings for which work is commenced which can take advantage of the transitional provisions.”

How Can FrameX Help? 

Cost-Effective and Compliant Designs

We’re committed to providing the most cost-effective and compliant designs on the market. 

We always ensure our designs and products meet current and future building regulations without compromising quality or performance. All of these factors go hand in hand and never get overlooked at FrameX.

Some of our products also offer thermal enhancement. As an example, our revolutionary suite of PURe® FOLD doors offers incredible thermal efficiency. They have an additional thermal barrier manufactured from expanded polyurethane (PUR), allowing ultra-low U values to be achieved (as low as 1.1 W/m2K).

Our products provide unbeatable thermal performance and comply with the new regulations and futureproof projects and buildings. To find out more, explore our product ranges on our website, get in touch with our expert team or visit our showroom in the heart of Rossendale Valley.

A Dedicated and Experienced Specialist Team

Deadlines are just as important to us as they are to you. We understand the pressure of the new regulations and the preparation it takes to ensure everything is in alignment with the new changes. With the help of FrameX, you’ll be one step ahead and ready for the ongoing changes within the building and fenestration sector.

We are ahead of the game, and we’ve been helping specifiers, builders, and architects prepare for the new regulations. We offer an array of support from our specialist team from specification, design and technical advice. 

Although the changes can be daunting, they’ll offer long-term value for those selling and developing new properties.

Buildings that are compliant with the new building regulations will be more attractive to your clients and give them the peace of mind they need, knowing their homes have been designed with the energy efficiency standards in mind and not those that were in place ten or more years ago.

Be prepared for the Part L Regulations with FrameX

Get in touch with FrameX to discuss your project requirements, receive a FREE no-obligation quotation and get on track for the new changes. We’re here to help, answer queries and provide solutions.

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