Sash windows have been a hallmark of multiple architectural buildings, particularly in British architecture. This window type integrates modern and timeless architecture, making it a popular window option in 2026. This window, whether made of uPVC or wood, has the perfect ratio of functionality and aesthetics.
In this comprehensive guide, we’ll highlight the top 10 sash window manufacturers of 2026 that set the standard for quality, design, and sustainability. Whether you’re renovating or remodeling, these manufacturers offer a broad range of windows that suit your needs!
Contents
What makes a sash window manufacturer the best?
There are hundreds of top window manufacturers in 2026 competing to provide the market with innovative and customized products. In choosing the best sash window manufacturer, you have to consider their craftsmanship, material quality, customer services, and overall product performance. The first one is craftsmanship, which encompasses design and innovation. These manufacturers should maintain the classic features and innovative style of sash windows, such as sliding sash windows or vertical sliding sash windows.
In addition, the best sash window manufacturer should use high-quality materials in their production process. Some materials they should provide are timber, aluminum, or windows, known for being durable. The best manufacturer should also provide excellent customer service by being accommodating to their clients. However, the most important quality of the best manufacturer is the overall product performance. Their windows should slide smoothly and contain durable sash cords or spring balances.
Top 10 Sash Window Manufacturers in 2026
The following are the top ten sash window manufacturers you should check out.
1. Sash Window Workshop
- Location: Bracknell, Berkshire, England
- Company Type: Manufacturing
- Year founded: 1944
- The number of employees: 50-200
- Main Products: Timber Windows, Bespoke Windows, Sash Windows, Traditional Windows, Sliding Sash Windows, and Doors
Sash Window Workshop is a multi-award-winning company established in 1944. This company has over 30 years of experience in the window and door industry, providing high-quality products and services. Sash Window Workshop also focuses on providing product solutions for residential and commercial spaces. This allows them to work closely with builders, architects, and homeowners.
Sash Window Workshop specializes in designing, producing, and installing premium timber sash windows. They designed their products to complement the architectural structure of the space while improving energy efficiency. They also offer a broad range of window types, such as classic single-hung sash, double-hung sash, and sash windows with contemporary energy-efficient features.
2. Mannlee
- Location: Foshan, Guangdong, China
- Company Type: Manufacturing
- Year founded: 1998
- The number of employees: 300
- Main Products: Sash Windows, Doors, and Energy-Efficient Products
Mannlee is one of the best sash window manufacturers in Guangzhou, China. This company is renowned for its dedication to fine craftsmanship, energy efficiency, and innovation. For over 2 decades, they have continuously improved their products and production. These improvements allow them to provide windows and doors that contain aesthetic and functional features.
Mannlee always delivers exceptional products and service. They have a wide range of innovative windows and doors, from commercial windows to sliding sash windows. Mannlee also takes pride in excellent customer service, guaranteeing that all their products meet the highest standards.
3. NorDan
- Location: Livingston, West Lothian, Scotland
- Company Type: Manufacturing
- Year founded: 1981
- The number of employees: 50-200
- Main Products: Timber Windows and Doors, Aluminum-Clad Timber Windows and Doors, and Low-Embodied Carbon Products
NorDan is a family-owned business that offers windows, doors, and smart accessories across Europe. With over 2200 workers, 12 factories, and 35 project management offices, NorDan continues to rise in the window and door industry. NorDan has a lot to offer in the industry and consumers, particularly its commitment to sustainability and innovation.
With timber as their core material, NorDan provides window and door solutions that maximize the energy efficiency and functionality of the space. One of the main advantages of their product lines is attaining low carbon values. These values are then reflected in their products: multi-sash, aluminum-clad timber windows, and more.
4. Anglian Home Improvements
- Location: Norwich, England
- Company Type: Manufacturing
- Year founded: 1966
- The number of employees: 1,000-5,000
- Main Products: Sash Windows, Timber Windows, Conservatory Windows and Doors, and Doors
With more than 50 years of experience, Anglian Home Improvements is one of the leading sash window manufacturers in the UK. This company provided the market with products for the residential market, particularly premium windows, doors, conservatories, and home remodeling solutions. Since its founding in 1966, Anglian Home Improvements has built a reputation for providing dependable, quality, and visually appealing products.
In addition, Anglian Home Improvements specializes in sash windows. Their sash windows come in both traditional timber materials and timber-effect uPVC. Anglian’s sash windows are popular in the industry for their low maintenance qualities and energy-efficient criteria. Along with its other products, it is durable, long-lasting, and secure, with multi-point locking systems.
5. Everest Windows and Doors Inc.
- Location: Toronto, Ontario, Canada
- Company Type: Manufacturing
- Year founded: 2010
- The number of employees: 2-10
- Main Products: Sash Windows, uPVC Windows, Hung Windows, Black Windows, Custom Doors, and Custom Windows
Everest is one of the most well-known window manufacturers in Canada. This company started in 2010 and has rapidly risen to provide premium products, excellent customer service, and innovation. At the core of their company is their dedication to producing and installing high-quality windows, doors, and other home renovation items. Some products they offer are sash windows, casement windows, and UPVC doors.
Everest window and door products are an excellent option for residential areas as they integrate innovative design and energy efficiency. Beyond these products are comprehensive services that focus on design, consultation, and installation. Their commitment to quality and customer service is why their products perform at their best.
6. Trimline Windows Incorporated
- Location: Ivyland, Pennsylvania, USA
- Company Type: Manufacturing
- Year founded: 1966
- The number of employees: 50-200
- Main Products: Double Hung, Casement, Bow, Bay, Awning, Picture Windows, and Sash Replacement Kits
Trimline Windows Incorporated offers high-quality windows for various markets, including replacement, remodeling, new construction, and historically certified rehabilitation projects. For over 20 years, this company has provided a broad range of products, such as round tops, ellipses, and other architectural window products. They also have standard windows like double hung, casement, bow, bay, awning, picture windows, and sash replacement kits.
Trimline Windows product variations were made possible because they employ state-of-the-art facilities. With a commitment to quality and innovation, Trilime’s extensive product offerings cater to the specific needs of its clients. This is why, aside from their standard products, they also offer customization services.
7. Strafford Window Manufacturing Inc.
- Location: Stafford, New Hampshire, USA
- Company Type: Manufacturing
- Year founded: 1993
- The number of employees: 2-10
- Main Products: Sash Windows and Transom Windows
Founded in 1993, Strafford Window Manufacturing is one of the best sash window manufacturers. Strafford Window Manufacturing is a family-owned business, specializing in manufacturing custom transom, sash, hopper, and single-hung windows for barns, stables, and sheds. These products are available in custom orders that consumers can purchase in different numbers. This company strives to provide high-quality products while emphasizing customer service.
In addition, Strafford Window Manufacturing has invested in automation and cutting-edge equipment to ensure accurate production of every custom sash order. This is why their company has grown steadily, which allows them to produce about 5,000 custom windows and sell more than 350,000 windows.
8. The Sash Window Company
- Location: London, London
- Company Type: Manufacturing
- Year founded: 2007
- The number of employees: 2-10
- Main Products: Traditional Timber Sash Windows, French Doors, Front Doors, Timber Windows, Timber Doors, and French Windows
The Sash Window Company was established by Henry Coles in 2007. This company operates in London and creates custom timber sash windows and doors. All of these windows and doors are skillfully crafted by using high-quality materials, contain sound and draught protection, and are designed aesthetically. This is why their products can improve the functionality and architectural character of the space.
The Sash Window Company provides a complete sash window solution, including design, production, and installation. Their factory in South London is responsible for producing all their products. This enables them to offer sash windows with a fast turnaround time and a high standard of customer service.
9. Accoya
- Location: London, UK
- Company Type: Manufacturing
- Year founded: 2007
- The number of employees: 200-500
- Main Products: Accoya Wood, Timber, Windows, and Doors
Accoya is among the top window and door manufacturers based in the UK. Since its launch in 2007, Accoya has been a preferred manufacturer for various homes and buildings. This is because Accorya offers high-quality materials for all their windows, doors, decking, and siding products. All of its products are also made at its manufacturing plant in Arnhem, in the Netherlands, ensuring that they are of high quality and sustainable.
Accoya is reputable in the window and door industry for its exceptional products and services that show longevity in residential and commercial settings. The outcomes of such a reputation are reflected in all of their products and services. Accoya attracts consumers and design experts for this reason.
10. Eco Sash & Case
- Location: Edinburgh, Scotland
- Company Type: Manufacturing
- Year founded: 2018
- The number of employees: 2-10
- Main Products: Sash Window Repairs, Sash and Case Windows, and Doors
Eco Sash & Case is a family-owned business specializing in repairing, renovating, and manufacturing sash and case windows and casement windows. This company contains skilled workers and cutting-edge technology to create quality and sustainable products. This company is also committed to being environmentally friendly, so they source sustainable timber and add draught-proofing to the windows.
Over the years, Eco Sash & Case has molded its experience to renovating and updating traditional sash and case and casement windows. This is why they replace and restore historic sash windows using more ecologically friendly methods and supplies. With Eco Sash & Case, window products, repair, and installation services are all made economical, environmentally friendly, and sustainable.
How to Choose a Sash Window Manufacturer
Selecting a sash window manufacturer involves considerations that extend beyond affordable pricing.
- Local selection is your first step since it simplifies visits and delivery processes and improves communication channels. Companies that provide customization options benefit customers since their windows should align with their home design rather than the opposite.
- The attention to customer service stands at the same level of importance as other factors. Your search should lead you to a team which offers professional advice alongside responsive service while guaranteeing their work quality.
- The evaluation of energy performance matters since well-insulated windows bring annual cost savings to homeowners. Avoid making purchasing decisions solely based on cost.
- Seeking the least expensive price for replacement windows tends to be unwise because durable superior products from established manufacturers will deliver both long-term efficiency and assurance. Invest time to compare different options before selecting a manufacturer who delivers skilled craftsmanship alongside excellent customer care and enduring product value.
A properly constructed sash window should improve your home’s appearance and functionality beyond what you had originally.
FAQs
1. What is the best UPVC sash window?
In finding the top uPVC sash window, there are some factors that must be taken into account. Smooth operation, good thermal insulation, and high construction levels are all essential to maintaining long-term performance. The window must fit in with traditional appearance as well as take on contemporary functionality, offering a flawless blend of style and efficiency. Quality makers such as Mannlee and Sash Window Workshop are renowned for creating well-designed period styles that are not just stunning but long-lasting as well. Resistant to warping, these windows also come with full guarantees for your reassurance, giving you optimum performance and value for money from your investment.
2. What are the benefits of uPVC sliding sash windows?
Modern technology integrates with traditional sash window looks to produce uPVC sliding sash windows. These windows provide energy efficiency to decrease heating costs and simultaneously fight against weather damage and rot and pest infestations. The material requires no maintenance since it does not require painting or sealing. The variety of finishes and styles available allows uPVC sliding sash windows to enhance homes built in different time periods.
3. Can uPVC windows be repaired?
Most uPVC windows show easy repairability. Replacements of faulty locks and broken handles and stuck sashes and misted glass issues do not require a complete unit replacement. The repair process for these units is fast along with being affordable. The solid condition of your main frame allows you to restore your current windows while making them last longer which saves both effort and financial resources.
4. What is the difference between UPVC and wood windows?
In selecting between wooden and uPVC windows, some considerations come in:
- Long-lasting: uPVC windows are very long-lasting and weather-tight, less likely to rot, and peel. uPVC windows have low maintenance in comparison to wooden windows, which tend to rot with time if one does not take care of them.
- Maintenance: uPVC windows are easy to maintain since they do not have to be painted or sealed, while wooden windows require routine maintenance in the way of painting and sealing.
- Aesthetic: Wooden windows provide a classic, natural aesthetic and are able to add depth to the inherent character of heritage properties, creating them to look sophisticated and timeless.
- Price: uPVC windows are typically cheaper than wooden windows, and their minimal maintenance needs can pay off for you in the long term.
Conclusion
The sash window manufacturing industry in 2026 offers diverse options to cater to various needs. You can find sash windows in traditional styles like sliding sash windows or a more elevated one. Because of this diversity, some manufacturers, like Anglian Home Improvements and Everest, offer alternatives like uPVC and composite sash windows. Whereas, Sash Window Company and The Sash Window Workshop continue to uphold high levels of traditional craftsmanship.
Choosing the best window manufacturer is crucial when buying sash windows. Mannlee is one of the best window manufacturers that offer sash windows that meet a high standard. Check our product option now.
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