External Composite doors are very popular as front entrance doors in the UK. These doors are made from a combination of materials such as wood, uPVC, PU foam insulation, and a thermoplastic polymer skin. This makes them one of the best front door designs available. They provide security, durability, weather-resistance, and thermal insulation, keeping the home warm by preventing heat from escaping.

Our premium collection feature popular composite front door designs, including traditional, cottage, and contemporary styles, with the option for matching front door side panels in selected designs.

Our external composite doors are designed to keep your home warm and secure. The door panel is 44mm or 48mm thick and has insulating materials to keep the heat in and the cold out. They meet the latest Building Regulations for energy efficiency.

These doors are durable and can last over 30 years with proper maintenance. They are strong and can withstand everyday use without cracking or peeling.

With minimal maintenance requirements, composite doors are among the easiest front and back door types to care for. Regular wiping down and keeping the seals and hinges free of debris will help ensure their longevity. Request price today to get supplied and fitted across London and Hitchin.

Upgrading to aluminium sliding patio doors is an affordable and long-lasting way to connect your home to your outdoor space, such as a garden, balcony, or conservatory. These aluminium sliding double glazed glass doors slide open easily on a track, making them a popular and efficient space-saving option when compared to bi-fold doors.

Discover our range of strong double-glazed  aluminium sliding patio doors, which are easy to maintain and built to last. Each door is fitted with a high-security 3-star rated cylinder lock. You can choose from a variety of colours such as classic white, sleek black, or elegant Chartwell Green, we have the perfect door that seamlessly complements your home’s aesthetic. Custom-made during the design process, our doors can incorporate various attractive features and glazing options to create your ideal back door solution.

Our sliding patio doors can be customized to fit your room’s dimensions. You can choose from 2, 3, 4 or 6 pane options for our aluminium sliding patio doors.

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FAQs about Aluminium Sliding Patio Doors

What are aluminium sliding patio doors?

Aluminium sliding patio doors are large, sliding doors made from aluminium frames with glass panels. They are designed to provide seamless access to outdoor spaces like patios, gardens, or balconies while offering durability, modern aesthetics, and excellent functionality.

What are the benefits of aluminium sliding patio doors?

• Durability: Aluminium is strong, resistant to corrosion, and long-lasting.
• Low maintenance: Aluminium frames require minimal upkeep compared to wood or other materials.
• Sleek design: Slim frames maximize glass area, offering unobstructed views and plenty of natural light.
• Energy efficiency: Modern aluminium sliding doors often feature thermal breaks and double glazing for better insulation.
• Space-saving: Sliding mechanisms don’t require swing space, making them ideal for smaller areas.

Are aluminium sliding patio doors energy-efficient?

Yes, modern aluminium sliding patio doors are designed with thermally broken aluminium frames and double-glazed glass, which significantly improve insulation and reduce heat loss, making them energy-efficient.

Can I customize the design of my aluminium sliding patio doors?

Absolutely! You can choose from a variety of:

• Colors: Options like grey, green, blue, or custom finishes to match your home’s exterior.
• Glass types: Clear, frosted, tinted, or energy-efficient glass.
• Hardware: Modern handles and locking systems for enhanced security and style.

How do aluminium sliding patio doors compare to other materials like wood or uPVC?

• Durability: Aluminium is more durable and long-lasting than wood or uPVC.
• Maintenance: Aluminium requires less maintenance than wood, which can warp or rot over time.
• Aesthetics: Aluminium offers a sleek, modern look compared to the bulkier frames of uPVC.

Are aluminium sliding patio doors secure?

Yes, aluminium sliding patio doors are highly secure. They come with advanced locking systems, toughened or laminated glass, and robust frames, making them resistant to forced entry.

Can I install aluminium sliding patio doors myself?

While DIY installation is possible, it’s recommended to hire a professional to ensure proper fitting, alignment, and sealing. Improper installation can lead to issues like drafts, leaks, or difficulty sliding.

How do I maintain aluminium sliding patio doors?

Maintenance is simple:

• Clean the frames regularly with a mild detergent and water.
• Lubricate the sliding tracks to ensure smooth operation.
• Check and clean the drainage channels to prevent water buildup.

Are aluminium sliding patio doors suitable for all weather conditions?

Yes, aluminium is highly resistant to weathering, including rain, wind, and UV exposure. With proper sealing and insulation, these doors perform well in all climates.

Can I use aluminium sliding patio doors for large openings?

Yes, aluminium sliding patio doors are ideal for large openings because of their strength and ability to support large glass panels without compromising stability.

What is the difference between aluminium sliding patio doors and bifold doors?

• Sliding doors: Slide horizontally on tracks, ideal for spaces with limited room for door swings.
• Bifold doors: Fold open in sections, creating a wide opening but requiring more space to operate.

Do aluminium sliding patio doors come with thermal breaks?

Yes, many modern aluminium sliding patio doors feature thermally broken aluminium frames, which include a barrier to reduce heat transfer and improve energy efficiency.

Can I combine aluminium sliding patio doors with other door types, like French doors?

Yes, you can create a custom design by combining sliding patio doors with other door styles, such as French doors, to suit your home’s layout and aesthetic preferences.

Are aluminium sliding patio doors eco-friendly?

Yes, aluminium is recyclable, making it an environmentally friendly choice. Additionally, energy-efficient designs help reduce your carbon footprint.

What are the latest trends in aluminium sliding patio doors?

Current trends include:

• Slim frames: Maximizing glass area for a modern, minimalist look.
• Smart glass: Options that switch between transparent and opaque for privacy.
• Integrated blinds: Built-in blinds between glass panes for convenience and style.

Exterior Bifolding Doors in Hitchin and London

Looking to open up your home or extension with professionally installed bifolding doors? DuraJoin supplies and fits custom aluminium bifold systems across Hitchin, Greater London, and surrounding areas. 

Every unit is made to measure, built for thermal performance, and installed by experienced tradespeople. Whether you’re replacing dated doors or designing a new-build opening, we provide full-service delivery from quote to aftercare. Clean lines, smooth operation, expert fitting, with no compromises.

Aluminium Bifolding Doors Supplied and Fitted Across Hitchin and London

DuraJoin supplies and installs aluminium bifolding doors tailored to properties across Hitchin, Greater London, and surrounding areas. Every set is made to order, sized to your opening, and delivered with complete installation, including structural lintel work if required.

We regularly work on modern homes, rear extensions, and full refurbishments. Our team understands the planning nuances across boroughs like Camden, Barnet, Islington, and North Hertfordshire. Where approvals or glazing specs are needed, we align with your architect or builder to keep things compliant.

Lead times average 2 to 3 weeks from sign-off to delivery. Installation typically takes 1 to 2 days, depending on site access and existing structure. We manage every step for a clean, weather-tight finish.

Why Homeowners in Hitchin and London Choose DuraJoin

We’re not just another supplier. We deliver precision-built bifolding doors and handle every detail of the project with control, clarity, and confidence. 

Here’s why clients across Hitchin and Greater London consistently choose DuraJoin:

• Made to Order
  Every bifolding door system is built specifically for your property. No generic frames. No off-the-shelf sizes. Just clean, exact lines and smooth operation. 
• Precision Install, No Subcontractors
  All installations are carried out by our in-house team. We don’t pass the work off. You get expert-level fitting with full accountability from start to finish. 
• Built for Performance
  Our aluminium doors are engineered for warmth, security, and light control. Multi-point locks, thermally broken frames, and high-performance glazing come as standard. 
• Local Compliance Expertise
  We understand the planning and compliance requirements across boroughs like Barnet, Camden, Islington, and Hitchin. Our local team ensures everything fits, functions, and complies. 
• Proven Trust and Repeat Work
  Homeowners, builders, and architects continue to work with us because we don’t oversell or underdeliver. Every project is handled with focus, accuracy, and professionalism.

Looking for a local quote?

Book a site visit or send your measurements to get a fast, accurate estimate. We serve Hitchin, Greater London, and the surrounding regions.

Frame, Colour, and Glass Options

DuraJoin bifolding doors are built for more than just looks. Every unit is engineered for lasting performance and tailored to fit your exact preferences.

Our frames use slimline aluminium profiles with full thermal breaks. These deliver strength and energy performance without the bulky sightlines of older systems. You get more glass, cleaner edges, and reliable insulation year-round.

Colour options include any RAL finish, with the ability to specify different colours for the inside and outside of the frame. Whether you want crisp white, bold black, or something that complements your interiors, it’s all made to order. Dual-colour frames give flexibility across traditional and modern builds.

Glazing choices are just as flexible. We offer double and triple glazing, laminated safety glass, and solar control units to reduce heat gain and glare in exposed spaces. If noise is a concern, acoustic-rated glass is available to minimise external sound.

Our systems are designed around your layout. Choose between two-panel up to seven-panel configurations, opening in or out, with smooth running tracks and no sagging over time. You can also specify flush thresholds for step-free access, perfect for kitchen extensions or rear lounges leading to garden patios.

All units are fully sealed and weather-tested for high performance in rain, wind, and temperature shifts. These aren’t just style pieces. They’re built to last.

How We Work

At DuraJoin, our bifolding door process is engineered for clarity, quality, and consistency. From your first call to the final seal, every stage is handled by professionals who know your area and understand the requirements. 

Here’s how we get it right.

Survey and Advice

Every project starts with a site visit. Whether you’re in Hitchin, North London, or Greater London, our team visits your property to inspect the opening and surrounding structure. We check access points, daylight angles, structural support, drainage conditions, and opening orientation.

This isn’t a sales pitch. It’s a technical survey designed to ensure the correct bifolding system is specified for your property. We also identify any early issues that might require structural support or special drainage detailing.

Design and Quote

Next comes design. If needed, we’ll create CAD drawings to show the layout and panel breakdown, especially useful for new builds or extensions. Every quote is transparent and includes supply, installation, site trimming, sealing, waste removal, and finishing.

You get a fixed figure, not a rough estimate. If planning permission or building control is involved, we supply the specs and drawings required to move things forward.

Manufacture

Once approved, we manufacture your bifolding doors to exact specification. That includes your chosen number of panels, finish, opening direction, glazing, threshold format, and colour.

All our doors are made using high-performance, thermally broken aluminium and precision-engineered running gear. Each system is quality tested before it ever leaves the workshop.

Delivery and Install

We don’t outsource installation. The same DuraJoin team that surveyed your opening fits your doors.

We deliver directly to site. The install typically takes one to two days depending on access and prep requirements. Our team seals, trims, aligns, and tests the system for airtightness, watertightness, and smooth operation.

You don’t have to chase multiple trades. We coordinate directly with any builder or contractor already working on your site and keep disruption to a minimum. Clean-up is part of the job. Nothing is left behind.

Aftercare and Warranty

You’ll receive both product and installation guarantees for peace of mind. We also offer optional annual maintenance checks to keep your doors operating as new and ensure seals, rollers, and frames stay protected year after year.

Need technical advice before ordering?

Speak to our team directly at 020 3576 2142 or email info@durajoin.com to schedule a consultation or request a callback.

Serving Hitchin and London with Confidence

We supply and install bifolding doors across Hitchin, Greater London, and surrounding boroughs with precision and professionalism. 

Our team has hands-on experience with property types common to the region, including kitchen extensions, modern new builds, and period refurbishments.

We regularly work in areas such as Islington, Camden, Barnet, and throughout Hertfordshire. We understand the planning policies, structural variations, and homeowner expectations specific to each zone.

DuraJoin handles every stage of the process, from survey to installation, with strict quality control. We are familiar with permitted development rights, building control protocols, and how to deliver compliant, attractive results.

Frequently Asked Questions

Q: Can bifolding doors be installed in a small opening?
Yes. A two-panel bifold is ideal for smaller openings. It folds compactly to one side, providing clear access and good ventilation without needing large space. We tailor each unit to your measurements to ensure it fits cleanly and operates smoothly, even in compact openings.

Q: Are they secure?
Yes. All our bifolding doors come with integrated multi-point locks, reinforced hinges, and toughened safety glass as standard. For higher security needs, we offer laminated glazing or full Secured by Design certified specifications, trusted by architects and developers across London and Hitchin.

Q: Do I need planning permission?
In most cases, no. Bifolding doors at the rear of a property typically fall under Permitted Development. We check each property type and location during the site visit. If planning or building control is required, we’ll flag it and assist with the paperwork.

Q: How long does installation take?
Most bifolding door installations take 1 to 2 days from delivery to completion. This includes fitting, sealing, and finishing. If any structural work is needed, we’ll coordinate with your builder or handle it ourselves to keep things on schedule with minimal disruption.

Q: Will it get too hot in summer?
No. We offer solar control glass options designed to reflect heat while letting in natural light. You can also combine solar and low-g coatings for south-facing walls or exposed areas. These reduce glare and overheating while maintaining thermal performance in winter.

Q: Can it match the rest of my windows?
Yes. All frames are finished in your chosen RAL colour, and we offer dual-colour options to match interior and exterior styles. We can also replicate detailing to match nearby windows or doors, whether it’s traditional framing or a modern architectural look.

Get a Quote for Your Hitchin or London Property

Ready to price your bifolding door installation? DuraJoin offers accurate quotes with or without a site visit, tailored to your property’s needs and your exact dimensions.

If you’re in Hitchin, Greater London, or surrounding areas, we can usually schedule a site visit within 2 to 3 working days. We’ll assess the opening, drainage, access, and anything else that affects your install timeline and cost.

Prefer a quick estimate first? Send us your plans or rough sizes. Our team will get back to you with a full quotation that includes the glass spec, finish, frame colour, thresholds, and installation costs. No hidden extras, no generic pricing.

Every quote includes product supply, on-site installation by our in-house team, and a clear scope of work from start to finish. We handle all details so you don’t have to.

Call now: 020 3576 2142
Email: info@durajoin.com
Or use the contact form on our website for a fast, no-obligation quote.

External French Doors

DuraJoin supplies and installs custom-built external French doors across London, Hitchin, and nearby areas. Every unit is made to fit your space, finished to your specification, and installed by our in-house team. 

Choose from a full range of materials, colours, and glazing options. Whether you’re upgrading a period property or finishing a new extension, we deliver durable French doors with a clean, secure, and high-performance finish. Supply and installation handled from start to finish.

External French Doors Supplied and Installed Across London and Hitchin

External French doors are supplied and installed across London, Hitchin, and surrounding areas with full project handling from survey to completion. Each unit is built to order using precise measurements and tailored specifications.

Available in aluminium or timber frames, with a wide range of RAL colours including dual-finish options. Choose between open-in or open-out configurations to suit the layout of your home or extension. Glazing can be double or triple, with upgrades available for solar control, acoustic insulation, or laminated safety glass.

Designed to fit both period and modern properties, these doors complement kitchen extensions, garden rooms, and full refurbishments. Structural preparation is included if required, ensuring doors are properly supported and sealed.

Installation is carried out by an experienced in-house team. No subcontractors. Site is left clean and ready to use. Lead times typically range from 2 to 3 weeks, depending on spec. Most fitting work is completed within a day.

Everything is managed in-house to ensure quality, compliance, and a seamless handover. From first measurements to final clean-up, the service is built for reliability and precision.

Why Homeowners and Builders Choose DuraJoin

Choosing a supplier for external French doors is not just about looks or price. You need long-term durability, proper installation, and full compliance with building standards. DuraJoin provides an end-to-end service backed by in-house expertise, custom manufacturing, and a strong reputation across London, Hitchin, and surrounding regions.

Tailored Manufacturing for Every Opening
Each French door set is made to order and built precisely to fit your structural opening. We don’t work with off-the-shelf units or pre-set dimensions. That means your doors will not just look right; they will function perfectly, with proper tolerances, sealing, and alignment.

Designed to Match Any Property Style
We offer slimline aluminium profiles for a sleek modern finish or timber-framed options for heritage projects. Glazing bar layouts, sightlines, and handle types are all configurable. You can choose traditional proportions or contemporary clean lines, depending on your home’s architecture.

Colour-Matched to Existing Windows and Doors
Your doors will not stand out for the wrong reasons. We colour-match to any RAL code and offer dual-colour finishes for inside and outside contrast. The powder coating we use is weatherproof, UV-resistant, and long-lasting with minimal upkeep.

Security and Thermal Performance Built In
All doors include multi-point locking systems, secure internal glazing beads, and reinforced hinges. We offer toughened, laminated, and triple glazing options for those needing higher security and energy performance. Frames are thermally broken to prevent cold bridging.

Installed by Our In-House Team
We never outsource installation. Our team handles everything from prep to sealing and finishing. This means one point of contact, full accountability, and no miscommunication between manufacturers and fitters.

Planning and Building Control Awareness
We have hands-on experience with planning policies across boroughs in London and Hertfordshire. If your project is in a conservation area or part of a listed building, we can help you choose suitable styles and provide drawings or specs as needed.

Trusted by Professionals and Homeowners Alike
We work regularly with private clients, developers, architects, and contractors. Whether it’s a single door set for a home or multiple installs for a new development, our team delivers with consistency and clarity.

Looking for a quote?

Use the contact form, send your plans, or call 020 3576 2142 to speak directly to our team. Site visits available across Hitchin, London, and surrounding areas.

Frame, Glazing, and Colour Options

External French doors are available in thermally broken aluminium or traditional timber, both built for strength, insulation, and long-term performance. Aluminium offers a clean, slim profile suited to modern homes, while timber delivers the character and authenticity needed for heritage properties.

All units can be finished in any RAL colour. Dual-colour options are also available, allowing for a different interior and exterior tone. This ensures the doors complement your existing window frames or overall design. Coatings are applied in the factory for maximum durability and weather resistance.

Glazing is tailored to your needs. You can choose from toughened, laminated, or triple glazing depending on your security and insulation requirements. For heat control and privacy, solar control and frosted glass options are also available. Every unit is internally glazed to meet security standards.

Doors can open inward or outward, depending on the layout of your room or garden. Optional glazed sidelights provide additional natural light and can be built into one or both sides of the frame. For a smooth threshold, we also offer step-free options and integrated drainage solutions, ensuring functionality without compromising appearance or performance. All details are reviewed before manufacture to guarantee precision.

How We Work

We follow a precise, professional process to ensure every external French door installation is completed correctly, without delays or shortcuts. From the first measurement to the final seal, every step is managed in-house.

Site Survey

We begin with a local site visit. A member of our team visits your property in London, Hitchin, or nearby to confirm your existing opening or proposed location. We take accurate measurements, assess the structure, check for drainage or threshold requirements, and gather all the technical details needed for manufacture. If you’re working on an extension or full renovation, we coordinate with your builder or contractor at this stage.

Design and Quote

Once measurements are confirmed, we prepare a full specification quote. If needed, we provide CAD drawings or elevation visuals to show layout, proportions, or glass configurations. Your quote includes everything: frames, glazing, hardware, delivery, fitting, and finishing. You’ll know exactly what’s included and what to expect.

Manufacture

After you approve the quote and sign off on your specification, we begin manufacture. Each door is built to order. The selected frame material, colour finish, glazing type, and hardware are prepared in line with your brief. You’ll be updated with estimated lead times and delivery dates as the unit is fabricated.

Install

On the agreed date, the finished French doors are delivered directly to your site. Installation is carried out by our in-house team. No subcontractors. We manage removal of any existing frames, preparation of the opening if needed, and complete fitting with full weather sealing. All trims, thresholds, and finishing work are completed on the same day or the following day depending on site conditions. Our team leaves the space clean and ready for use.

Aftercare and Warranty

Every installation comes with a product and installation guarantee. We offer optional annual checks if you’d like scheduled aftercare, and we’re available locally should you need future adjustments or advice.

Ready to get started?

Call 020 3576 2142 or email info@durajoin.com to speak to a team member. Site visits and quotes are available within 2–3 working days.

Serving Greater London, Hitchin, and Hertfordshire

We supply and install external French doors across Greater London and Hertfordshire, including North London, West London, and Hitchin. Our team regularly works on projects involving listed buildings, kitchen extensions, and modern new builds. 

We understand local planning and building regulations, particularly in boroughs like Camden, Islington, Barnet, and Hitchin District. That means faster site visits, accurate estimates, and smooth approvals. Whether you’re upgrading an existing opening or planning a full extension, we ensure every door is built and fitted to the correct standard.

Frequently Asked Questions

Can I replace old French doors with new ones?
Yes. We can replace outdated or damaged French doors with modern, high-performance units. The opening is assessed during our site survey to ensure proper fit, drainage, and structural support. Whether timber or aluminium, your new doors will meet today’s standards for insulation, security, and appearance.

Do I need planning permission?
In most cases, planning permission is not required. Replacing doors on the rear of a property usually falls under Permitted Development. However, if your home is listed, in a conservation area, or part of a flat conversion, we will advise on what approvals may be needed before work begins.

Can they open inward or outward?
Yes. Our French doors can be configured to open either inward or outward, depending on your layout and preference. We’ll confirm the best option during your site visit, taking into account available space, furniture placement, and garden access.

Will they be secure?
All doors include multi-point locking systems and toughened or laminated glazing as standard. Optional upgrades are available for Secured by Design compliance. Every unit is built and installed to meet UK safety and security regulations for residential properties.

Can they match my windows?
Yes. We can colour-match your French doors to any RAL shade, including dual-finish options for interior and exterior contrast. Frame profiles can also be selected to closely align with your existing window sightlines and style.

What’s the lead time for install?
Lead times typically range from 2 to 4 weeks from order to install, depending on your chosen material, glass spec, and finish. Installation usually takes one day. We’ll confirm exact timelines during your quote and keep you updated throughout the process.

Get a Quote for External French Doors in London or Hitchin

We offer quotes with or without a site visit. You can send across rough dimensions or architectural plans, and we’ll provide a full breakdown including glass, finish, installation, and aftercare.

If you’re based in London, Hitchin, or anywhere in Hertfordshire, we can typically schedule a site visit within 2 to 3 working days.

All quotes are handled by our in-house team. There are no delays, no guesswork, just accurate pricing and clear next steps.

Call: 020 3576 2142
Email: info@durajoin.com
Or use the contact form for a fast estimate.