Aluminium French Doors

Open up your home with elegant, made-to-measure aluminium French doors.

Classic Style – Made for Modern Living

Open up your home with beautifully made aluminium French doors.

Whether you’re restoring a period property, planning an extension, or looking for a contemporary update, our made-to-measure French doors bring balance, light and elegance to the point where indoors meets out.

Manufactured in Yorkshire and delivered across the UK, each set is backed by our family-run team, with expert advice and service from first enquiry to final installation.

Choose the right aluminium French doors for your home

FRENCH DOOR SYSTEM	Alitherm Heritage	Alitherm Heritage 60	Sheerline Classic	Alitherm 400
Appearance	Authentic period steel look	Steel look	Heritage style	Contemporary
Authenticity compared to steel look	⭐⭐⭐⭐⭐	⭐⭐⭐⭐⭐	⭐⭐⭐⭐	N/A
Typical use	Listed & conservation	Refurbishment, replacement & new build	Refurbishment, replacement & new build	Modern residential
Frame depth	47 mm	60 mm	64 mm	70 mm
Max sash width	1832 mm	1832 mm	2032 mm	2274 mm
Maximum PAS24 door sash width	1832 mm	1832 mm	2032 mm	2274 mm
Max standard door height	2100 mm	2100 mm	2300 mm	2400 mm
Maximum PAS24 door height	2200 mm	2100 mm	2300 mm	2400 mm
Door sash sightline	58 mm	67 mm	62 mm	129 mm
Door sash PAS24 sightline	68 mm	67 mm	62 mm	129 mm
Standard door meeting style sightline	100 mm	116 mm	102 mm	196 mm
Meeting style PAS24 sightline	117 mm	116 mm	102 mm	196 mm
Handle block sightline	231 mm	248 mm	220 mm	N/A
Handle block sightline PAS24	248 mm	248 mm	220 mm	N/A
Opening options	In or out	In or out	In or out	In or out
Glazing thickness double glazed	28 mm	28 mm	28 mm	28 mm
Glazing thickness triple glazed	28 mm	28 mm	28 mm	28 mm
Overall U value double glazed French door	1.4 W/m²K	1.4 W/m²K	1.4 W/m²K	1.4 W/m²K
Overall U value triple glazed Argon French door	1.4 W/m²K	1.2 W/m²K	1.2 W/m²K	1.2 W/m²K
Overall U value triple glazed Krypton	<1.2 W/m²K	<1.2 W/m²K	<1.2 W/m²K	<1.2 W/m²K
Overall U value with Designer panel	N/A	N/A	N/A	1.2 W/m²K
Part Q PAS24 security	Optional upgrade	Standard – optional laminated glass	Standard – optional laminated glass	Standard – optional laminated glass
Part L compliant	Yes	Yes	Yes	Yes
Part F compliant	Yes	Yes	Yes	Yes
Weather testing	BS6375 tested	BS6375 tested	BS6375 tested	BS6375 tested

Aluminium French doors are far from one-size-fits-all. Some capture the timeless character of classic steel with heritage detailing, while others offer a softer or more contemporary look. Here, we’ve brought together the styles we most often recommend for homes where design, quality and character matter.

Alitherm Heritage French Doors

If you’re looking for the most authentic steel-look, our Alitherm Heritage French doors are the perfect choice. They are especially well-suited to listed buildings, conservation areas, and projects where preserving original character matters.

With slim profiles, classic glazing bars and elegant proportions, these heritage aluminium French doors suit both traditional and contemporary spaces.

Explore Alitherm Heritage French Doors

Alitherm Heritage 60 French Doors

Our Alitherm Heritage 60 French doors capture the classic steel-look style while offering the practicality needed for everyday living.

Whether you’re refurbishing, replacing, or building from scratch, they combine heritage charm with modern comfort and impressive thermal performance. For many homeowners, they strike the right balance, which is why they remain such a popular choice.

Explore Alitherm Heritage 60 French Doors

white country house with lawn featuring heritage french doors

Sheerline Classic French Doors

Sheerline Classic French doors offer a nod to heritage, but with a more streamlined, contemporary edge. They are equally at home in renovations and new-builds, bringing a sophisticated look with clean lines and balanced proportions.

If you are drawn to heritage styling but prefer something slightly less traditional, these doors could be the right fit.

Explore Sheerline Classic French Doors

Modern renovated 1970s house with lawn featuring french doors

Alitherm 400 French Doors

Our Alitherm 400 French doors are designed with slim aluminium frames and a clean, streamlined appearance, allowing plenty of natural light into your living space while creating easy access to patios, gardens and balconies.

Suitable for renovations and new builds alike, these aluminium French doors combine modern aesthetics with reliable thermal performance, making them a versatile choice for homeowners who want lasting quality and understated design.

Explore Alitherm 400 French Doors

Doors open to Mac Glass Slimline Juliet balcony

Mac Glass Frameless Juliet Balcony

Transform upper-floor doors into stunning architectural features with the Mac Glass frameless Juliet balcony system. Designed for higher elevations, Mac Glass provides essential safety without compromising your view.

Featuring ultra-clear glass, concealed fixings, and slim sightlines, the system creates a seamless barrier that maximises natural light and opens up breathtaking panoramic views.

Mac Glass Frameless Juliet Balcony

Large modern kitchen featuring Heritage French doors

Accessibility: low and flush thresholds

If you want a smoother step between indoors and outdoors, we can offer advice on low and flush threshold options for your new French doors. We’ll help you balance:

Accessibility and day-to-day practicality
Weather performance
Floor build-up and finish levels

Threshold Help

Why choose Marlin for aluminium French doors?

At Marlin, we manufacture in West Yorkshire, deliver across the UK, and offer specialist installation throughout Yorkshire, Lancashire, Greater Manchester and beyond. From your first enquiry to aftercare, our approach is personal, attentive and built around quality. For added peace of mind, our windows and doors come with a 10-year warranty, five years on double-glazed units, and up to 25 years on powder-coated finishes, depending on location.

Every set of French doors we create is made to measure and tailored to your project. In homes where the finer details matter, such as sightlines, thresholds, glazing and colour, those details can turn a straightforward installation into something truly special.

Designed to look exceptional in daily life

French doors offer more than good looks. Their double-opening design welcomes in natural light, encourages fresh air, and creates a seamless connection between home and garden. In aluminium, this classic style is not only elegant but also robust, stable and easy to maintain, providing security and performance throughout the year.

For heritage projects, you get authentic character without the drawbacks of old steel. For modern homes, you benefit from a cleaner, slimmer and more durable alternative to heavier door materials.

ding Patio Doors

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”Jordan was absolutely amazing from start to finish, very happy with our doors and the service provided. Five stars all round!”

Sophie du Toit – Bedford

Customer Review Alitherm Heritage Door

the Marlin Windows team standing in front of the warehouse

Built in Yorkshire. Delivered UK-wide. Trusted support from the start.

With decades of experience in manufacturing aluminium windows and doors, we provide expert guidance from initial design through to installation support.

What you can expect:

Precision manufacturing and strict quality control
Expert advice tailored to your project
Help with sizing, specifications, and ordering
UK-wide delivery and trusted support
Expert aluminium French door installation across Yorkshire, Lancashire and Greater Manchester

Professional Aluminium French Door Installation

At Marlin Windows, we don’t just manufacture premium aluminium French doors — we also provide expert installation throughout Yorkshire, Lancashire, Greater Manchester and surrounding areas. Every installation is completed by our own experienced specialists who understand the importance of precision, detailing and finish.

Whether you’re replacing outdated patio doors, renovating a period property, or completing a contemporary extension, our team ensures your new French doors are fitted correctly for long-term performance, security and weather resistance.

Our Installer Service

Supply & Install Full professional installation

”Marlin Windows were reassuringly professional, calm & helpful from first contact which made the decision to use them so right. The pre-sales team were full of advice – not in the least bit pushy contrary to stereotype – & the advice was spot-on because they’d done it all before.

”The product looks amazing too… I suppose the windows might be much the same elsewhere & maybe even of similar price or cheaper, but the customer support, reliability, professionalism & interest at Marlin is second to none.

I honestly think it’s a rarity these days to come across a company with values like Marlin so 5*s well-deserved.”

Anne Corrigan – Hale, Altrincham

Colours, Glazing and Finishing Details

At Marlin, you will find popular finishes such as black, anthracite and white, along with a wide palette of colours, including the option to choose different shades inside and out.

High-performance glazing lets you tailor privacy, solar control and comfort, so your French doors suit both your style and the way you live.

Colours & Glazing

Helpful guides

The Buyers Guide to French Doors

Your questions answered.

Add a Certain ‘Je Ne Sais Quoi’ With Stylish aluminium French Doors.

French doors, a timeless classic, create continuity between the interior and the exterior of our homes.

The Buyers Guide to French Doors

Family-run business with unrivalled Customer Service

Unrivalled Quality Customer Service

Our high quality window and door products are backed by the same high quality customer service. Technical advisors are just a phone call away to answer all your questions no matter how technical.

Typical help provided includes:

Choosing the right product
Getting the right made to measure size
Help with ordering
Threshold advice

We provide a FREE sample service to assist with surveying decisions, design considerations, or planning applications – just pick up the phone and ask.

Contact our Customer Service team on 01535 603909 or Click to call

Latest projects

FRENCH DOORS

Heritage Windows and Doors in Bury, Greater Manchester – Stone Property Installation

HERITAGE WINDOWS AND DOORS

1920's Home – Heritage Aluminium Windows and Doors, Battersea, London

HERITAGE WINDOWS

Aluminium Heritage glazing system – Thieves Hollow, Cheshire

Frequently Asked Questions

If you require any support, please don’t hesitate to review our FAQ’s below or drop us a message on our contact form here.

What are French doors?

French doors are a pair of hinged doors that open from the centre, typically featuring large glazed panels to maximise natural light. They create a wide, elegant opening between your home and garden, patio, or interior spaces.

Are aluminium French doors energy efficient?

Yes. Modern aluminium French doors are designed with thermally broken frames and high-performance glazing to support strong thermal performance and year-round comfort.

Are heritage aluminium French doors suitable for older properties?

Yes. Heritage-style systems are often used on listed, conservation, refurbishment and design-sensitive projects where slim sightlines and a traditional steel-look appearance matter. The right option depends on how authentic you want that heritage detailing to be.

Do French doors open inwards or outwards?

They can be configured either way, depending on the system, the room layout, and how you want the doors to work in daily use.

Are white aluminium French doors available?

Yes. White is one of our most popular finishes, alongside black and anthracite, with further bespoke and dual-colour options also available.

How are aluminium French doors prices calculated?

Aluminium French doors prices depend on the system you choose, the overall size, glazing pattern, finish, hardware, threshold details and installation requirements. The fastest way to get an accurate figure is to request a bespoke quote for your project.

What is the difference between a heritage French door and a standard aluminium French door?

A heritage French door is designed to create a more traditional or steel-inspired appearance. It usually features slimmer sections, more defined glazing bars and period-led proportions. A standard aluminium French door usually has a more contemporary feel, with simpler lines and a cleaner overall look.

Come and explore…

Aluminium Bi-fold Doors, Sliding Doors, Contemporary Glazing, Aluminium Heritage Windows and Traditional Steel Replacement Doors

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