A guide to French doors: Pros, cons and materials

 

French doors have become an essential part of the home for many people. They provide better access to our outdoor spaces, allow natural light to flood in and can even be used as a design feature.

Originating in 17th-century France, these doors are celebrated for their distinctive design, characterised by multiple glass panels that extend the full length of the door. Originally designed to provide access to balconies and terraces in grand French châteaux and manor houses, French doors were a revolutionary architectural element that bridged the gap between interior luxury and outdoor beauty.

The traditional design typically features 10 to 15 individual glass panels, known as “lights,” separated by wooden or metal glazing bars called “muntins” or “mullions.”

Below, I explain more about the pros and cons of French doors, including why French doors are the perfect addition to your home.

Table of contents

• What are the benefits of French doors?
• What are the disadvantages of French doors?
• Choosing the right material for your French doors
• How much will French windows cost?
• What to consider when having your French doors installed

 

What are the benefits of French doors?

First, let’s talk about the benefits of these beautiful doors.

1. They bring more natural light into your home

One of the most cherished qualities of French doors is their ability to flood interior spaces with natural light. Did you know that French doors can increase natural light penetration by up to 40% compared to windows?

With all that extra natural light, you won’t need to use as much artificial lighting during the day, which has a range of psychological benefits, including improved mood and increased sense of wellbeing.

What’s even better, homes or spaces that have more natural light can feel up to 25% bigger than they actually are, creating a wonderful illusion of space in even the smallest rooms. So French doors could be the perfect choice for a small living room or home office.

2. They help to bring the outside in

French doors create what designers call “visual continuity”. This is the uninterrupted sightlines between indoor and outdoor spaces that help to make gardens, patios, and landscapes feel like natural extensions of your living areas. This effect is particularly pronounced when French doors open onto decking, terraces, or well-maintained garden spaces, creating a seamless indoor-outdoor living experience that’s highly sought after in contemporary home design.

If your garden is something you’re proud of, why look at it through a small window? French doors allow for a better, less interrupted view of your garden, meaning you can enjoy the greenery and the nature it has to offer.

 

3. They maximise energy efficiency and security

Modern advancements in technology have made French doors more energy efficient and secure than ever before.

With options for double or triple glazing, as well as high-quality locking mechanisms, you can enjoy peace of mind knowing that your doors not only enhance the beauty of your home but also provide optimal insulation and security.

Energy efficiency features

Contemporary French doors achieve impressive thermal performance through several innovations:

• Low-E glass coatings: This helps to reflect heat back into the room during winter while blocking excessive solar heat in summer
• Argon gas filling: This can improve the insulation properties of double-glazed units by up to 15%
• Thermal breaks: Prevent cold transfer through metal frames, eliminating condensation and heat loss
• Weather seals: These seals help to eliminate draughts

This insulation means that your home can retain heat much more easily, so you don’t have to constantly use your heating to try and keep it warm. The less you use your heating, the more you save on your energy bills long-term. Modern French doors can achieve U-values as low as 1.2 W/m²K, meeting and often exceeding current building regulation requirements.

In addition to this, opening French doors can allow a nice cool breeze into your home, which can be especially useful during the hot summer months. It is a natural and cheap alternative to other cooling methods, such as fans. The ability to create cross-ventilation by opening French doors on opposite sides of a property can reduce indoor temperatures by 3 to 5°C naturally, significantly reducing reliance on air conditioning systems.

Advanced security features

Modern French doors incorporate sophisticated security measures:

• Multi-point locking systems allow you to secure the doors at multiple points along the frame height
• Anti-lift hinges prevent doors being lifted off their hinges from the outside
• Laminated or toughened glass provides resistance to breakage whilst maintaining clarity
• Concealed shoot bolts are additional locking points hidden within the door frame
• Smart lock compatibility means you can integrate the doors with your home automation and security systems

 

What are the disadvantages of French doors?

So far, I’ve been singing the praises of French doors, and that’s because they have lots of pros. But they’re not perfect. Here are some of the cons of French doors that you should consider too.

1. They’re dust and dirt magnets

All those beautiful glass panels that flood your home with light? They also show every single fingerprint, smudge, and speck of dust, so if you’ve got kids or pets, you’ll quickly discover that French doors require more cleaning than you bargained for.

2. They reduce your privacy

While French doors allow lots of natural light in, this comes with a drawback. Everyone can see through them. This is fine if your home isn’t overlooked, but it could be less than ideal when you’re wandering around in your pyjamas on a Sunday morning and the neighbours are out doing their gardening.

Unlike solid doors that give you complete privacy, French doors mean you’ll need to think about window treatments, blinds, or curtains if you don’t want to give everyone a front-row seat to your daily life. And even then, closing the blinds kind of defeats the whole point of having all that lovely glass in the first place, doesn’t it?

3. They need space to open

French doors need space to open, and I mean proper space, not just a little bit. Unlike sliding doors that tuck neatly to one side, French doors swing inward or outward, which means you need to keep that floor space completely clear.

If you go for outward-opening doors, you’ll need to make sure there’s nothing on your patio that’ll get in the way.

4. They can be pricey

A good set of French doors with proper installation can easily cost several thousand pounds, and that’s before you factor in any structural work that might be needed to accommodate them.

Plus, if something goes wrong (and things do go wrong), replacing or repairing French doors typically costs more than dealing with standard doors because of all those glass panels and the more complex mechanisms.

5. It limits your space for furniture

Once you’ve had your French doors installed, you’ll quickly realise that furniture placement becomes a bit of a puzzle. You can’t just plonk your sofa wherever you fancy anymore. You need to think about the door swing, sight lines, and how everything looks from both inside and outside.

It can also, therefore, reduce the usable space in a room. When furniture can’t go in front of your doors, it needs to go elsewhere, like this nursery:

 

Choosing the right material for your French doors

When selecting French doors for your home, it’s essential to consider the material that best suits your needs and preferences. Common options include wood, aluminium, and uPVC, each offering unique benefits in terms of durability, maintenance, and aesthetics.

Different door suppliers & installers may offer different ranges of French doors, including materials, giving you more choices on what you can pick. Most companies offer aluminium, uPVC and composite French doors, which all range in price and provide different functions and aesthetics. For a more daring and architecturally pleasing look, you could choose black steel doors, which add so much drama!

The main thing is that, whicever material you choose, you use trusted patio and french door installers, someone who understands the material and the best way to install it for maximum longevity. You don’t want your new wooden doors to be replaced because they haven’t been installed properly.

Traditional timber French doors

Before exploring modern alternatives, it’s worth considering traditional timber options. These might include:

• Hardwoods (oak, mahogany, teak)
• Softwoods (pine, fir)
• Engineered timber
• Accoya wood

Hardwoods generally offer better durability, but softwoods are the more affordable option. These also take paint better than hardwood, which would further protect your doors from the weather.

Engineered timber combines solid wood aesthetics with improved stability and reduced warping, and accoya wood is stainably sourced, acetylated timber offering 50+ year warranties against rot and decay.

Aluminium French doors

One of the most popular materials used for French doors is aluminium, which comes with a huge range of advantages when compared to other materials.

Firstly, aluminium French doors are secure and durable, making them exceedingly difficult to damage or breakthrough. Aluminium profiles can be designed with wall thicknesses of up to 2.5mm, providing exceptional rigidity and resistance to forced entry.

In addition to this, French aluminium doors are known for their energy efficiency and insulation, helping homeowners save on their energy bills by retaining more heat and not requiring as much heating and electricity.

All of these practical benefits are great, but the sleek and modern design that aluminium French doors have is also enticing. A brand-new set of aluminium French doors will raise the value and aesthetic appeal of any property.

Additional aluminium benefits include:

• There are multiple colour options available
• They’re low maintenance and easy to clean
• They’re made from 100% recyclable material with minimal environmental impact
• They have a typical lifespan of 30 to 40 years

 

uPVC French Doors

Another very common material is uPVC (unplasticised polyvinyl chloride), which is a low-maintenance option for your French doors.

uPVC French doors are another visually appealing option for your home, with black, white and anthracite grey being the most popular colour choices for these doors. On top of this, uPVC only requires some soap and warm water to clean, so you don’t have to dedicate hours on end to making them look as good as new.

A downside to having uPVC French doors is that they are prone to warping and swelling in warmer, humid temperatures, meaning that they can often be misshapen and no longer fit the frame as well as they used to. This makes them less thermally efficient and more likely to cause draughts in your home.

It also means that, despite being the budget option when compared to other door materials, you may actually end up spending more money long-term by repairing or replacing your uPVC French doors.

Composite French doors

With the rise of composite front doors, a new development for French doors is making composite French doors. These have all of the benefits of a composite door whilst adding the luxury of French doors.

These French composite doors are made up of a variety of materials, such as uPVC, Glass Reinforced Polymer (GRP), insulation foam and timber. The construction of these French doors means that they are not only extremely strong and resilient from the layers of material but also highly energy efficient due to the insulation foam fitted inside the door.

Composite French doors may be slightly more expensive than an aluminium door but can be a great long-term investment for your home for years to come.

 

How much will French windows cost?

The all important question. The cost will depend hugely on the company you use, the materials the doors are made of and so much more. But below, you can find an extimated summary of the cost of French doors:

• uPVC French doors: £800 to £1,500 per pair including installation
• Aluminium systems: £1,200 to £2,500 per pair depending on specification
• Composite doors: £1,500 to £2,800 per pair for premium systems
• Timber options: £1,000 to £3,500+ depending on wood type and design complexity

While this may seem like a lot of money, you do need to consider their long-term value. They could help to reduce your heating bills thanks to their improved insulation, and they could even increase the value of your home.

Your home insurance premium may even come down thanks to the doors’ improved security features.

 

What to consider when having your French doors installed

Installing French doors can sometimes require careful consideration when it comes to building regulations.

If you’re removing or altering load-bearing walls, then you need to have an engineer complete structural calculations to reduce the risk that the wall or ceiling will fall down.

Your French doors must also meet current Part L building regulations and, if being installed on a ground floor, should be made from toughened or laminated glass.

I’d advise that you don’t try to install French doors yourself, and instead get a certified installer to do the job properly.

 

French doors are more than just doors. They have an ability to seamlessly blend indoor and outdoor areas, enhance natural light, and provide versatility and security.

As architectural trends continue to emphasise indoor-outdoor living, sustainable materials, and smart home integration, French doors remain at the forefront of these developments. Their timeless appeal ensures they will continue to be a desirable feature for homeowners seeking to create beautiful, functional, and valuable living spaces for generations to come.