When it comes to choosing the best double glazing for your home, the UK boasts a variety of top-notch companies offering a wide range of products. Whether you’re looking for energy-efficient windows, secure doors, or stylish conservatories, these leading manufacturers provide reliable solutions tailored to meet your needs.
In this article, we’ll explore the top 10 best double glazing companies in the UK, known for their exceptional quality, customer service, and innovative products.
Type of Business:
Private limited company specializing in manufacturing and installing windows, doors, and home improvement products.
Headquarters:
Liberator Road, Norwich, NR6 6EU, United Kingdom.
Year Founded:
1966
Anglian Home Improvements is one of the best home improvement companies in the UK, with over 500,000 windows and doors installed annually. The company operates nationwide, with a strong market presence, providing a wide range of products manufactured to high standards within the UK. Anglian has over 55 years of experience in the industry, employing approximately 1,500 people.
uPVC Double Glazed Windows
– Standard Low-E double glazing with argon gas filled IGUs
– Energy ratings up to A+ / A++ depending on configuration
– Flush and standard casement profiles availableAluminium Double Glazed Windows
– Officially stated standard U-value: 1.4 W/m²K
– Thermally efficient aluminium frames
– Designed for modern slim-frame applicationsTriple Glazed uPVC Windows (Flush Profile)
– Officially stated U-value: 1.0 W/m²K (A++ rated option)
– Low-E glass with argon gas fillDouble Glazed Doors
– Composite, uPVC, French and patio doors
– Glazed panels use Low-E + argon IGUs
– Designed to meet UK replacement door regulations
Anglian holds a 30–35% share of the UK replacement windows market. A founding member of FENSA, it ensures compliance with UK safety standards. During the COVID-19 pandemic, Anglian launched industry-first remote design consultations. Their nationwide network includes over 20 showrooms and depots. All products carry a 10-year guarantee for added confidence.
Type of Business:
Private limited company specializing in manufacturing and installing double glazing windows, doors, and home improvement products.
Headquarters:
Liberator Road, Norwich, NR6 6EU, United Kingdom.
Year Founded:
1965
Everest is a top home improvement company in the UK, renowned for its high-quality double glazing products. With over 50 years of experience, Everest offers a wide range of bespoke solutions, including uPVC, timber, and aluminium windows, as well as a variety of doors and conservatories. The company operates nationwide, providing energy-efficient and secure products tailored to meet diverse customer needs.
Double Glazed Windows (uPVC / Timber / Aluminium)
– Official energy ratings up to A+
– Typical double glazing configuration: Low-E + argon gas
– Casement, sash, bay and tilt-and-turn stylesTriple Glazed Windows
– Officially stated A++ energy rating
– Typical configuration achieves U-value around 1.0 W/m²K (as published in Everest efficiency guides)Low-E Glass Systems
– Everest publicly explains Low-E coatings for heat retention
– Used across both double and triple glazing rangesDouble Glazed Doors
– Composite, patio, French and bi-fold doors
– Energy-efficient sealed units integrated
Everest’s commitment to quality is evident in its product offerings, which include A+ rated uPVC casement windows and A++ rated triple glazing options. The company also provides a 10-year guarantee on most products, with extended warranties available on select ranges. Additionally, Everest’s products are manufactured in the UK, supporting local industry and ensuring stringent quality control.
Type of Business:
Private limited company specializing in manufacturing and installing uPVC double glazed windows and doors.
Headquarters:
Liberator Road, Norwich, NR6 6EU, United Kingdom.
Year Founded:
1992
Safestyle UK was once among the largest uPVC double glazing suppliers in the UK. The company operated nationwide, offering a wide range of energy-efficient products. However, in October 2023, Safestyle UK entered administration, ceasing operations and leaving many customers with unresolved installations and warranties. Prior to its closure, Safestyle was known for its competitive pricing and extensive product offerings.
uPVC Double Glazed Windows
– Casement, tilt-and-turn and sliding sash styles
– Multi-point locking systems
– Double glazed sealed units (specific U-values not stated on product pages)Double Glazed Doors
– Composite, uPVC and aluminium door ranges
– French doors, patio doors and bi-fold doorsRoofline & Home Improvement Products
– Fascias, soffits and guttering
– Designed to complement window and door installations
At its peak, Safestyle UK held a significant market share in the UK replacement window and door market, supported by its extensive product range and nationwide coverage. The company was recognized for its energy-efficient solutions, including A-rated windows endorsed by the Energy Saving Trust.
Type of Business:
Private limited company specializing in aluminum window and door manufacturing, cabinetry, wall panels, and bathroom customization.
Headquarters: Foshan, China
Year Founded:
2009
PA Home is a trusted window brand in the UK, having successfully undertaken numerous residential and commercial projects across the region. With 17 years of international project experience, PA Home has serviced over 3,500 B2B clients worldwide, providing high-quality, customized solutions for both residential and commercial properties.
- Starlight Window & Door Series
• Premium aluminum window and door system featuring thermally broken multi-chamber profiles.
• Supports double or triple glazed IGUs with Low-E and laminated glass options.
• Designed with multi-layer sealing to enhance airtightness and weather resistance.
- Star Window & Door Series
• Core aluminum window and door range for residential and mixed-use projects.
• Thermally broken profiles paired with insulated double glazing.
• Dual EPDM sealing system improves closure performance and air tightness.
- Eco Invisible Interior Door Series
• Flush-to-wall interior door system with concealed aluminum frame.
• Supports wall-matching finishes for a seamless, minimalist appearance.
• Integrated hidden hardware maintains clean visual lines.
PA Home excels through its “whole-house customization” and “one-stop solution” approach, offering clients a seamless experience from design to installation. This comprehensive service model ensures personalized solutions tailored to meet specific needs, creating spaces that are both functional and aesthetically pleasing.
Type of Business:
Private limited company specializing in manufacturing and installing uPVC double glazed windows, doors, and home improvement products.
Headquarters:
Station Road Industrial Estate, Lenwade, Norwich, Norfolk, NR9 5LY, United Kingdom.
Year Founded:
1971
First Home Improvements is one of the longest-established double glazed window companies in the UK, with roots dating back to the early 1970s. This best window brands offers a wide range of uPVC double glazed windows and doors, all sourced from quality-assured suppliers. With over 45 years of experience, First Home Improvements has built a reputation for providing high-quality products and services to homeowners across England.
Double Glazed Window Systems
– Officially stated A+ energy rated
– uPVC profiles with energy-efficient sealed units
– Casement, sash, bay and tilt-and-turn optionsDouble Glazed Doors
– Composite and uPVC front and back doors
– French doors, patio doors and bi-fold doorsGlazed Extensions
– Double glazed porches
– Conservatories with thermally efficient glazing
First Home Improvements specializes in energy-efficient uPVC double glazing products, offering A-rated windows and doors that contribute to reducing carbon emissions. The company provides a 10-year warranty on all products, ensuring long-term customer satisfaction. With a network of showrooms across England, First Home Improvements offers professional local services for high-quality home improvement products.
Type of Business:
Private limited company specializing in manufacturing and installing double glazing windows, doors, and home improvement products.
Headquarters:
Gardeners Street, Dunfermline, Fife, KY12 0RN, United Kingdom.
Year Founded:
1917
CR Smith
CR Smith is a best home improvement company in Scotland, renowned for its high-quality double glazing products. With over 100 years of experience, CR Smith offers a wide range of bespoke solutions, including uPVC, timber, and aluminium windows, as well as a variety of doors and conservatories. The company operates nationwide, providing energy-efficient and secure products tailored to meet diverse customer needs. CR Smith is the only company in Scotland to manufacture the majority of its products locally, ensuring stringent quality control and supporting the local economy.
Lorimer® Double Glazed Windows
– Officially stated energy rating: A
– Officially stated U-value: 1.4 W/m²K
– Designed to replicate traditional timber aestheticsDouble Glazed Window Styles
– Casement, tilt-and-turn and sliding sash windows
– Manufactured in-house in ScotlandSecondary Glazing Systems
– Internal glazing layer to improve thermal and acoustic performance
– Used where full window replacement is restrictedDouble Glazed Doors & Conservatories
– uPVC and composite doors
– Conservatories with insulated glazing systems
CR Smith’s commitment to quality is evident in its product offerings, which include A+ rated uPVC casement windows and A++ rated triple glazing options. The company also provides a 10-year guarantee on most products, with extended warranties available on select ranges. Additionally, CR Smith’s products are manufactured in Scotland, supporting local industry and ensuring stringent quality control.
Type of Business:
Private limited company specializing in manufacturing and installing uPVC and aluminium double glazed windows, doors, and conservatories.
Headquarters:
Britelite House, Bircholt Road, Parkwood Trading Estate, Maidstone, Kent, ME15 9XY, United Kingdom.
Year Founded:
1970
Britelite Windows is a top supplier of double and triple glazed windows, doors, and conservatories in the South East of England. With over 50 years of experience, this window supplier has installed over 18,000 windows and 300 conservatories in 2022 alone. Britelite operates showrooms in Maidstone, Kent, and Wickford, Essex, and is recognized as a Which? Trusted Trader, reflecting its commitment to quality and customer service
Residence 9® uPVC Windows
– Officially stated U-values: 1.2 W/m²K and down to 0.8 W/m²K (depending on specification)
– Argon-filled 28mm and 44mm glazing optionsAluminium Bi-Fold Doors
– Official configurator displays U-value: 1.2 W/m²K
– Thermally efficient aluminium frame systemsAluminium Casement Windows
– Officially stated use of polyamide thermal break barriers
– Designed for contemporary residential applications
Britelite offers a comprehensive range of uPVC and aluminium double glazed windows and doors, catering to diverse customer preferences. The company’s products come with a 10-year guarantee and are installed by experienced fitters. Britelite’s commitment to quality is further demonstrated by its BSI Kitemark certification, ensuring that its products meet high standards of safety and performance.
Type of Business:
Private limited company specializing in manufacturing and installing uPVC and aluminium double glazed windows and doors.
Headquarters:
5 Peregrine Place, Moss Side, Leyland, PR25 3EY, United Kingdom.
Year Founded:
1996
Clearview Home Improvements has established a strong presence in the North West of England, offering tailored double glazing solutions. With over 25 years in the industry, they have built a solid reputation for delivering high-quality, energy-efficient windows and doors. As a member of the Glass and Glazing Federation, the company adheres to strict industry standards to maintain its high product quality.
Envisage Flush Casement Windows
– Officially stated Window Energy Rating: A+
– Officially stated U-value: 1.2 W/m²KuPVC Window Ranges
– Energy-efficient sealed units
– Designed to meet UK replacement window regulationsSecondary Glazing Systems
– Used to enhance thermal and acoustic performance
– Installed internally without altering external appearanceDouble Glazed Doors
– Composite, patio, French and bi-fold doors
Clearview stands out by offering a broad range of British windows and doors, including both uPVC and aluminium options. Their products are manufactured locally, ensuring top-tier quality, and the company offers extended warranties of up to 20 years. Known for competitive pricing, Clearview is a reliable choice for those seeking durable and cost-effective home improvements.
Type of Business:
Private limited company specializing in manufacturing and installing double glazing windows, doors, conservatories, and home improvement products.
Headquarters:
Dairycoates Industrial Estate, Wiltshire Road, Hull, HU4 6PA, United Kingdom.
Year Founded:
1971
EYG Windows has been a prominent name in the home improvement sector, serving Yorkshire, Lincolnshire, and Nottinghamshire for over 50 years. With a strong reputation for producing energy-efficient solutions, this window and door company takes pride in manufacturing all products locally within the UK. EYG’s expertise lies in delivering tailored double glazing solutions that enhance both the energy performance and visual appeal of homes.
Aluminium Bi-Fold Windows
– Officially stated U-value: 1.4 W/m²K
– Weather-tested to British standardsDouble Glazed Window Collections
– uPVC and aluminium windows
– Manufactured to suit traditional and modern homesDoors & Extensions
– Double glazed doors
– Garden rooms and glazed extensions
EYG Windows specializes in crafting uPVC and aluminium double glazed windows that offer superior thermal efficiency. The company’s long-standing commitment to quality is reinforced by its 10-year guarantee. Additionally, EYG’s flexible payment plans, including “buy now, pay later,” provide homeowners with greater affordability. With products made locally, EYG ensures strict quality standards are maintained across its range.
Type of Business:
Privately owned company specializing in the manufacture and installation of uPVC and aluminium double glazed windows, doors, and conservatories.
Headquarters:
Bristol, England
Year Founded:
1982
Britannia Windows has established itself as one of the best double glazing manufacturers in the UK, with over 40 years of experience in the industry. Known for offering a wide range of bespoke home improvement solutions, this window and door company ensures that each product is tailored to meet the specific needs of homeowners. They are a trusted name in the industry, operating across various regions and offering professional installation services that guarantee customer satisfaction. As a member of Network Britannia, they adhere to the highest standards of quality in the home improvement sector.
EcoSilence® Window Series
– Officially stated U-values as low as 0.66 W/m²K (“can achieve” wording on official page)Residence & Heritage Window Collections
– Officially stated U-value: 1.2 W/m²KOrigin® Aluminium Windows
– Officially stated U-values as low as 0.8 W/m²KComposite Door Collection
– Glazing incorporates Low-E glass + argon gas
– Officially stated centre pane U-value: 1.1
– Minimum door energy rating: B
Britannia Windows excels in providing top-tier uPVC and aluminium double glazing products, including energy-efficient A-rated windows and doors. The window and door company offers a 10-year guarantee on most of its products, ensuring long-term reliability. In addition, Britannia provides flexible financing options, making it easier for homeowners to invest in energy-efficient solutions. As one of the best double glazing manufacturers, Britannia is committed to enhancing the aesthetic appeal and energy performance of homes, helping customers save on energy bills over time.
Conclusion
Above are the top 10 best double glazing companies in the UK. For more information on high-quality home improvement solutions, including double glazing, feel free to contact PA Home. Our team is here to provide expert advice and tailored solutions to meet your needs.
Best local double glazing companies in the UK include: CR Smith (Scotland), Clearview Home Improvements (North West England), Britelite Windows (London & South East) and First Home Improvements (Southern England), etc.
Double glazing uses two glass panes with an air or gas gap to improve insulation, reduce noise, and boost security.
Prices typically range from £400 to £800 per window installed, depending on size, frame material, and extras.
Leading UK suppliers offer 10–20 year guarantees on frames and sealed units against defects and seal failure.
Double glazing uses two glass panes separated by an air or gas-filled gap. This layer reduces heat transfer, improves insulation, and cuts noise.
