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Marlin Windows is a family-run Yorkshire manufacturer specialising in bespoke aluminium windows and doors. Established in 2003, we manufacture our products in-house at our facility in Keighley, West Yorkshire.

With over 20 years of experience, we work with homeowners, architects, builders and developers across the UK, providing high-quality glazing solutions for both heritage and contemporary properties.

From initial advice and design through to manufacture, delivery and installation, our focus is simple: exceptional quality, expert guidance and a personal service from a team that genuinely cares about getting your project right.

Company Registration No: 06625209

We offer nationwide delivery across the UK, with our professional installation service available across the North of England.

Whether you’re planning a new build, renovation or home improvement project, our team can help arrange the right delivery or installation service for your requirements.

No. At Marlin Windows, our work is carried out by our own experienced team, allowing us to maintain consistently high standards from start to finish.

Our team takes great care throughout every stage of the process, ensuring your project is completed professionally and to the standard you expect. By keeping our work in-house, we can take full responsibility for the quality of our products and workmanship.

It also means you have one point of contact throughout your project, so you won’t find yourself caught between a manufacturer and subcontractor if an issue arises. It’s all part of our commitment to providing a reliable, high-quality service and complete peace of mind.

All of our products come complete with a comprehensive warranty. We offer a full five-year warranty on all double glazed units and a full ten years on our doors and windows.

Our powder coated aluminium benefits from a 25-year warranty (marine environments are subject to an assessment).

Our warranties are comprehensive, if we install your products we fully guarantee the manufacture and installation for your total peace of mind.

If a job is done on a supply-only basis, Marlin still guarantee the manufacture of the products, however cannot guarantee the installation work of a third party.

Our showroom is located at our headquarters in Keighley, West Yorkshire, where you can explore our range of aluminium windows and doors in person.

Our experienced team will be on hand to demonstrate our products, answer your questions and discuss the best options for your project.

Yes, visits to our showroom are by appointment only. This ensures one of our experienced team members is available to give you their full attention and provide expert advice tailored to your project.

Booking ahead also gives us the opportunity to understand your requirements before you visit, helping you get the most from your appointment.

Yes, absolutely. We encourage you to bring your architectural drawings, plans or measurements along to your showroom appointment.

Our experienced team can review your plans with you, discuss your requirements and recommend the most suitable windows, doors and glazing options for your project.

Yes. We welcome architects and builders to visit our showroom with their clients.

Simply book an appointment in advance and our experienced team will be available to discuss the project, demonstrate our products and provide technical advice where required.

Yes. Our showroom features a range of fully operational aluminium windows and doors, giving you the opportunity to see, open and experience our products before making your decision.

You can compare different styles, configurations, colours and finishes while our team demonstrates how each product operates and talks you through the available options.

We will ask you to provide the following information:

• Approximate dimensions (width x height)
• Basic design/layout
• Project location

We aim to return all quotations within 24 hours however large projects may take longer. Fre

No, our quotations are completely free and there’s no obligation to proceed. Simply send us your measurements, plans or project details and our team will provide a detailed quotation tailored to your requirements.

Once your order is placed, our team will guide you through each stage of the process. We’ll confirm the details of your order, arrange a site survey where required, and provide final drawings and specifications for approval before your products go into manufacture.

Once manufacturing is complete, we’ll arrange delivery or, if you’ve chosen our installation service, coordinate a suitable installation date with you. Our team will keep you informed throughout, so you know exactly what to expect at every stage. LEARN MORE

Yes, we require a 50% deposit when you place your order, with the remaining balance due in line with the agreed payment terms.

Full payment details and terms will be clearly outlined in your quotation before you proceed.

Yes, changes can usually be made before your order enters production. We recommend contacting us as soon as possible if you need to make any amendments.

Once manufacturing has started, changes may not be possible or could result in additional costs and changes to your lead time. Our team will always discuss this with you before proceeding.

We offer a comprehensive range of bespoke aluminium windows, including Heritage Windows, Steel Replacement Windows, Contemporary Windows and Bespoke Glazing Solutions.

Whether you’re restoring a period property, replacing traditional steel windows or creating a modern new build, our windows are made to measure and can be tailored to suit your property, style and performance requirements.

Aluminium windows are strong, slim-framed and highly durable windows made using thermally efficient aluminium profiles. Their strength allows for slimmer sightlines and larger areas of glass, helping to maximise natural light while creating a clean, contemporary appearance.

They’re also low maintenance, energy efficient and available in a wide range of colours and finishes, making them an excellent choice for both modern and traditional homes.

Our aluminium windows are available in a wide range of colours and finishes, including popular RAL colours, textured finishes and dual-colour options, allowing you to choose different colours for the inside and outside.

Whether you’re looking for a classic, heritage or contemporary finish, our team can help you find the perfect option for your property. LEARN MORE

Yes. Our aluminium windows are designed with excellent thermal performance in mind, using modern thermally broken aluminium profiles and high-performance glazing to help reduce heat loss and improve energy efficiency.

The level of thermal performance will depend on the window system and glazing specification selected, and our team can advise on the best solution for your project.

We offer a variety of glazing options to suit different requirements, including double and triple glazing, toughened and laminated safety glass, acoustic glazing, solar-control glass and obscure glass for increased privacy.

Our team can recommend the most suitable glazing specification based on the performance, appearance and location of your windows.

Our aluminium windows are designed with security in mind, combining the inherent strength of aluminium with robust frames, high-quality locking systems and secure glazing.

Different security specifications are available depending on the window system you choose, and our team can advise on the most appropriate option for your home.

No. Aluminium windows are extremely low maintenance and do not require regular painting or treating like traditional timber frames.

Generally, occasional cleaning of the frames and glass, along with basic care of the hinges, handles and locking mechanisms, is all that’s required to keep your windows looking and performing their best for years to come.

We offer a wide range of made-to-measure aluminium doors, including Heritage Steel-Look Doors, Bi-Fold Doors, Sliding Patio Doors, French Doors, Residential Entrance Doors and Internal Heritage Doors.

With options to suit both traditional and contemporary homes, our team can help you choose the right door for your property and requirements.

Our aluminium Heritage Doors are designed to replicate the slim, elegant appearance of traditional steel doors while offering the modern benefits of aluminium.

With slim sightlines, distinctive steel-look detailing and a choice of configurations, they’re ideal for both traditional and contemporary homes. Each door is made to measure and available in a range of colours, finishes and glazing options.

It depends on how you want to use your space. Bi-fold doors fold neatly to one side, creating a wide opening and a seamless connection between your home and garden.

Sliding doors are ideal if you want larger panes of glass, slim sightlines and uninterrupted views while keeping the doors closed.

Our team can talk you through both options and help you decide which is best for your home.

The maximum height of our Visoglide Plus sliding door system is 3000mm for standard slide and 2550mm for Life & Slide.

The maximum height of our Prestige sliding door is 2500mm. Frequently Asked Questions

The maximum width of our Visoglide Plus sliding door system is 6500mm.

The maximum width of our Prestige sliding door is 6500mm.

In order to achieve the largest visible glass areas it is preferable to use using as few panels as possible. Our sliding door system can be made in 2, 3, 4, 6 or even 8 panel configurations that are capable of spanning extremely large openings.

The maximum height of our Visofold 1000 bifolding door system is 2550mm.

The maximum height of our Visofold 6000 bifolding door system is 2300mm.

The maximum height of our Prestige bifolding door is 2600mm.

The maximum width of our Visofold bifolding door systems is 6000mm.

The maximum width of our Prestige bifolding door systems is 6500mm

We always recommend using the minimum number of panels as possible. This maximises the visible glass areas, keeps the frame sight lines to a minimum and improves the overall aesthetics of the door system.

All of our door systems allow for a flush finish to internal floors avoiding the need for a large step over the threshold area.

Very. Our doors are designed and tested to meet exacting security standards.

We use Avocet ABS Diamond-rated cylinders in our door systems, including for PAS 24 applications. Avocet ABS cylinders are independently accredited to TS007 3 Star, SS312 Sold Secure Diamond and Secured by Design standards — helping to keep your home safe and secure.

We offer the full range of RAL Classic colours as well as a small textured paint range.

Samples are available at no additional cost and can be obtained through our friendly sales team.

Yes, dual-colour options are available on selected aluminium door systems, allowing you to choose one colour for the exterior and another for the interior.

This is a great option if you want your doors to complement both the exterior of your property and your interior décor.

Yes. For projects using our installation service, we offer a professional site survey to ensure your windows and doors are correctly measured and specified before manufacture.

Our experienced surveyor will check the openings, dimensions and key installation details to help ensure everything is right before your order goes into production.

During your site survey, our surveyor will take accurate measurements, assess the openings and check any important installation details.

We’ll also confirm the final specification of your windows and doors, helping to identify and resolve any potential issues before your products are manufactured.

Yes. We offer a professional installation service across the North of England, giving you the option of having your new windows and doors supplied and fitted by our experienced team.

For projects outside our installation area, we offer nationwide delivery across the UK.

Your windows and doors will be installed by our experienced installation team, who understand our products and the correct methods required to achieve the best possible finish and performance.

By managing the process from survey through to installation, we can maintain high standards throughout your project and provide you with a single point of contact. LEARN MORE

Yes, where agreed as part of your installation, our team can carefully remove your existing windows and doors before fitting your new products.

The exact scope of the installation work will be clearly detailed in your quotation, so you’ll know what is included before your project begins.

U-values vary depending on the window or door system, glazing specification and overall configuration.

We offer a range of thermally efficient aluminium systems designed to meet different performance requirements. If your project has a specific U-value target, let our team know and we can recommend the most suitable product and glazing specification.

Yes. Our windows and doors can be specified to meet the relevant requirements of current UK Building Regulations.

Requirements can vary depending on the property and application, so our team will help ensure the products are correctly specified for your individual project.

Yes. We offer both double and triple glazing across selected window and door systems, allowing you to choose the right level of thermal and acoustic performance for your home.

Our team can advise on the most suitable glazing specification based on your project requirements.

We offer a range of safety glazing options, including toughened and laminated glass, depending on the application and requirements of your project.

Where safety glazing is required, our team can help ensure the appropriate glass specification is selected for the location and intended use.

Yes. Acoustic glazing options are available for projects where reducing external noise is particularly important.

Different glass specifications can provide different levels of sound reduction, so our team can recommend an appropriate solution based on your property and requirements.

Yes. Our aluminium windows and doors are designed with security as a key consideration, combining strong aluminium profiles with high-quality glazing, hardware and locking systems.

Selected products can also be specified to meet enhanced security requirements where required. Our team can advise on the appropriate security specification for your project.

Yes. You can send us your architectural drawings or plans and our experienced team can review them to help specify and quote the most suitable windows and doors for your project.

We can also discuss your plans with you at our showroom and provide advice on product selection, configurations and glazing options.

Your builder will need to ensure that the openings, finished floor levels and surrounding structure are correctly prepared before your windows and doors are installed.

We can provide the relevant dimensions and technical information required for your chosen products, and our team can liaise with you or your builder to help ensure the site is ready for installation.

For supply-only orders, our typical lead time is around 4–5 weeks from final order confirmation.

Lead times can vary depending on the product, specification and size of your order. We’ll confirm your estimated lead time when your order is placed.

Yes. We can arrange delivery of your windows and doors directly to your home or project site.

We offer nationwide delivery across the UK, with delivery arrangements confirmed with you in advance to ensure someone is available to receive the order.

Your windows and doors will be carefully prepared and delivered using our own vehicles, helping to ensure they remain protected throughout their journey.

By managing our own deliveries, we can take greater care of your products from our factory right through to their arrival at your home or project site.

Our team will contact you to arrange delivery and provide the necessary information so you know what to expect and can ensure the site is ready to receive your products.

If your building work is delayed, please contact us as soon as possible. We’ll work with you to discuss the available options and rearrange delivery or installation where possible.

Giving us plenty of notice helps us minimise disruption and avoid additional costs or delays.

We stand behind the quality of every product we manufacture. Our aluminium windows and doors come with a 10-year product warranty, a 25-year guarantee on the powder-coated paint finish, and a 5-year guarantee on double-glazed units.

With our products manufactured in-house, you can have complete confidence in the quality and long-term performance of your Marlin windows and doors.

If you experience a problem after installation, simply contact our team and we’ll be happy to help.

We’ll assess the issue and, where covered under your warranty, arrange the appropriate next steps to get it resolved as quickly as possible.

For any aftercare or warranty enquiries, simply contact the Marlin Windows team directly.

Because we manufacture our products ourselves, you’ll deal directly with us rather than being passed between different manufacturers, suppliers or contractors.

Aluminium windows and doors are easy to keep looking their best. We recommend regularly cleaning the frames with warm water, a mild detergent and a soft cloth or sponge.

Avoid abrasive cleaners, harsh chemicals or rough materials that could damage the powder-coated finish. LEARN MORE

Our aluminium windows and doors are designed to be extremely low maintenance.

Regular cleaning of the frames and glass, along with occasional checks and cleaning of tracks, drainage channels, hinges and moving components, will help keep your products operating smoothly and looking their best for years to come. LEARN MORE