15 Best Window Manufacturers in 2025

We all know that windows elevate the beauty of buildings and can provide great views for a home or office. However, windows also impact crucial factors, such as the amount of natural light a building receives, its security, energy efficiency, and the quality of its ventilation.

Naturally, this can make choosing the right windows a little more complicated. But it does not have to be. Partnering with a skilled and reputable window manufacturer enables you to explore different window options, seek expert advice, and find the best solutions for your project.

With this in mind, we took a deep dive to find the best window manufacturers across continents and find out what they have to offer. Come along as we review their products, services, and overall performance to help you find the best windows for your projects.

15 Best Window Manufacturers of 2025: An Overview

As a quick introduction, here is a comparative overview of all the window manufacturers, including their details and strengths.

Manufacturer	Location	Strengths	Main Products	Certifications	Website
Loewen	Manitoba, Canada	Quality luxury windows A strong, vast dealership network	WindowsDoorsCurtain walls	NFRCWDMA	https://www.loewen.com/
A1 Windows	British Columbia, Canada	Turnkey services for residential and commercial projects	Vinyl windowsAluminum windows	NAFSQAIEnergy Star	https://a1windows.ca/
Hotian	Hefei, Anhui, China	Quality custom windows High production capacity Short lead times Low MOQ	Custom windowsCustom doors	CENAMINFRC	https://hotianwindows.com/
West Coast Windows	British Columbia, Canada	High production capacity Curated services for homeowners and building professionals	WindowsDoors	Energy StarCSANAFS 08	https://westcoastwindows.ca/
Golden Windows	Ontario, Canada	Quality energy-efficient windows Serves homeowners and building experts	WindowsDoors	Energy Star	https://goldenwindows.com/
Casa Bella	Ontario, Canada	Comprehensive services for homeowners and building professionals Supplies new builds and replacement projects	WindowsDoors	Energy StarIntertekHealth Smart™	https://casabellawindows.ca/
Mumford & Wood	Tiptree, Essex, UK	Curated end-to-end services for homeowners and building experts	Timber windowsTimber doors	BSIFSCBWF	https://mumfordwood.com/
Sierra Windows	Paignton, UK	Prioritizes intricate window design details and functionality	WindowsDoors	BSISBD	https://sierrawindows.co.uk/
Critall	Essex, UK	Quality customizable steel windows Adequate production capabilities for small to large projects Serves both residential and commercial projects	WindowsDoorsHardware	BSIFENSACHAS	https://www.crittall-windows.co.uk/
Dowell	Queensland, Australia	High-performance, energy-efficient residential windows	DoorsWindowsSecurity and screening	NATAWERSHIA	https://www.dowell.com.au/
Horizon	Queensland, Australia	Serves both residential and commercial projects Offers a wide variety of frames for each window type	WindowsDoors	WERS	https://horizonwd.com.au/
Rylock	Victoria, Australia	End-to-end services for homeowners and building professionals Balances architectural design with high functionality	WindowsDoors	WERS	https://www.rylock.com.au/
M1 Windows	Pennsylvania, USA	Quality, customizable windows for different budgets Easy online access for homeowners and building experts	WindowsPatio doors	AAMANFRC	https://miwindows.com/
North East Windows USA	New York, USA	Ready to ship and custom windows Easy online window selection and ordering process High production capacity and ready inventory	WindowsDoors	AAMANFRCFGIA	https://northeastwindowsusa.com/
Zola Windows	Colorado, USA	Premium, energy-efficient windows End-to-end services for building experts	Windows	Passive House	https://www.zolawindows.com/

Loewen manufactures awning, picture, and single or double-hung windows for residential properties. They are made using premium solid wood, aluminum, and cyprium. Each window is designed with high-performance features, such as weather protection seals and energy-efficient glazing. For projects that require more resilient windows, the StormForce Series offers different designs of impact windows. 

Company Type: Manufacturer

Location: Steinbach, Manitoba, Canada

Products Offered: Windows, Doors, Curtain walls

Services Offered: Window customization

Quality Standards and Certifications: NFRC, WDMA

Bottom Line: Loewen is a suitable manufacturing partner for building professionals sourcing quality luxury windows. It, however, sells its products primarily through certified dealers. This can be a downside if you prefer to buy directly from the manufacturer.

Website: https://www.loewen.com/

A1 Windows offers windows for new constructions and renovations of residential and commercial buildings. They are available in vinyl or aluminum frames, which are customized to fit double or triple-glazed glass.

Both window frame options and the glass are impact-rated. They, therefore, provide higher energy efficiency, reduced noise, and enhanced weather protection. However, the aluminum window frames in the 350 Series are optimized with more robust weather protection features. They are thus more ideal for harsh weather regions and commercial buildings.

Company Type: Manufacturer

Location: British Columbia, Canada

Products Offered: Vinyl windows, Aluminum windows

Services Offered: In-home consultation, Window customization, Installation services

Quality Standards and Certifications: NAFS, QAI, Energy Star

Bottom Line: A1 Windows provides turnkey services for homeowners from in-house consultation to delivery and installation. They are equally accessible to and partner with building experts for residential and commercial projects of all scales.

Website: https://a1windows.ca/

Hotian is a full-service custom window manufacturer. It designs and fabricates casement, picture, awning, and folding windows, among many other options. The extensive customization options enable clients to select ideal features for their residential or commercial windows. Hotian designers and manufacturing experts are also available to offer advice on various choices.

The company uses energy-efficient glass paired with quality vinyl or extruded aluminum to ensure its windows are durable and easy to maintain. Its average lead time is 15 to 20 days. 

Company Type: Manufacturer

Location: Hefei, Anhui, China

Products Offered: Custom windows, Custom doors

Services Offered: Bespoke design, Manufacturing, Customization, Custom packaging, Shipping Support

Quality Standards and Certifications: CE, NAMI, NFRC

Bottom Line: Hotian’s high production capacity, flexible manufacturing, and turnkey services make it an ideal window supplier for homeowners, wholesalers, and building experts. It has a low MOQ and can thus supply both small and large-scale projects.

Website: https://hotianwindows.com/

West Coast Windows prioritizes durability, energy efficiency, high impact ratings, and great aesthetics in all its window designs.

The company offers 5 distinct window series. They vary based on design details such as the frame material, the sizes of their profiles, or the type of glass used for the window. Buyers can, therefore, select a window series with the features they require and then choose a bay, awning, folding window, or any other window type from that series.

Company Type: Manufacturer

Location: British Columbia, Canada

Products Offered: Windows, Doors

Services Offered: Window customization, Custom installation

Quality Standards and Certifications: Energy Star^®, CSA, NAFS 08

Bottom Line: West Coast Windows outlines that it serves homeowners and building professionals. It has the capacity to supply window solutions for single and multi-residency construction projects.

Website: https://westcoastwindows.ca/

Golden Windows manufactures energy-efficient windows for new builds and renovation projects. It simplifies the ordering process by grouping them into 3 different series of wood, vinyl, or aluminum windows. Each series outlines the customization options and features available for a specific window type. You only need to select a window type in the series that matches your requirements.

Company Type: Manufacturer

Location: Kitchener, Ontario, Canada

Products Offered: Windows, Doors

Services Offered: Window customization, Installation services

Quality Standards and Certifications: Energy Star

Bottom Line: Golden Windows is ideal for homeowners and building experts sourcing energy-efficient windows.

Website: https://goldenwindows.com/

Casa Bella takes pride in manufacturing resilient, energy-efficient windows. Notably, all its windows are Health Smart™-certified because they are built with unique features that maintain optimal humidity in a home.

The window options from Casa Bella include sliding, awning, bay, specialty windows, and more. Each window type has standard features, like triple weather stripping or multi-point locking systems. However, buyers can enhance their preferred windows by selecting and ordering custom features. 

Company Type: Manufacturer

Location: Mississauga, Ontario, Canada

Products Offered: Windows, Doors

Services Offered: Window customization, Installation services

Quality Standards and Certifications: Energy Star, Intertek, Health Smart™ 

Bottom Line: Casa Bella provides comprehensive window manufacturing services to homeowners and residential building professionals for new builds or window replacement projects.

Website: https://casabellawindows.ca/

Do you prefer the warm, inviting look of wooden windows? Then, Mumford & Wood’s may interest you. They manufacture bespoke timber windows for new builds, renovations, or heritage restorations of residential and commercial properties.

The company specializes in sliding sash and casement timber windows. Standard designs have quality wooden frames and are fitted with double-glazed glass. The customization options, however, enable buyers to select higher-quality glazing, various window profile designs, or different frame finishes. Mumford & Wood also accepts fully custom window orders.

Company Type: Manufacturer

Location: Tiptree, Essex, UK

Products Offered: Timber windows, Timber doors

Services Offered: Bespoke design, Manufacturing, Installation services, Aftercare

Quality Standards and Certifications: BSI, FSC, BWF

Bottom Line: Mumford & Wood provides curated end-to-end services for homeowners, architects, and building professionals sourcing timber windows.

Website: https://mumfordwood.com/

Sierra Windows is a bespoke window manufacturer. They pay great attention to detail and prioritize functionality. Case in point, all its vertical slider, casement, and tilt-and-turn windows have multiple weather seals and carefully assembled hardware. This makes them more energy efficient. The customization options also include different glazing qualities for enhanced energy ratings and security.

Company Type: Manufacturer

Location: Alders Way, Paignton, UK

Products Offered: Windows, Doors, Conservatories

Services Offered: Design consultation, Window customization

Quality Standards and Certifications: BSI, SBD

Bottom Line: Sierra Windows supplies windows to homeowners, building professionals, and wholesalers. What it lacks in variety, it makes up for in customization.

Website: https://sierrawindows.co.uk/ 

Critall has been manufacturing windows for more than a century. It specializes in steel windows for commercial and residential buildings. They are crafted with slim profiles to maximize views and light flow. Moreover, despite its application, each window comes fitted with multi-point locking systems, quality hardware, and low-e glass.

Critall offers numerous customization options for different budgets. It also stands out as one of the few manufacturers that offer interior windows.

Company Type: Manufacturer

Location: Witham, Essex, UK

Products Offered: Windows, Doors, Hardware

Services Offered: Window customization

Quality Standards and Certifications: BSI, FENSA, CHAS

Bottom Line: Critall is a worthy contender for homeowners and building experts sourcing quality, customizable steel windows for all scales of residential and commercial projects.

Website: https://www.crittall-windows.co.uk/

Dowell manufactures two key lines of windows. URBANLINE™ offers quality, affordable windows with great architectural aesthetics, while DESIGNERLINE® comprises elegant windows with high-performance hardware. 

These series do not limit variety; you can choose different window types (fixed, louver, casement, etc.) in any of the series you prefer. The windows are customizable in different shapes and colors and come with a 7-year warranty.

Company Type: Manufacturer

Location: Brisbane, Queensland, Australia

Products Offered: Doors, Windows, Security and screening solutions

Services Offered: Window customization

Quality Standards and Certifications: NATA, WERS, HIA                                         

Bottom Line: Dowell is a suitable window manufacturing partner for building professionals working on residential construction projects. It requires technical drawings for orders and enquiries, but equally reciprocates with helpful technical guidance and feedback.

Website: https://www.dowell.com.au/

Horizon specializes in aluminum windows for residential and commercial properties. The window types include sliding, bi-fold, casement, and awning windows, among others. Each window type is available in various window profiles. Buyers can select a suitable profile based on their preferred window features. Some features, for instance, are ideal for commercial windows while others are more suitable for impact windows. 

Company Type: Manufacturer

Location: Noosaville, Queensland, Australia

Products Offered: Windows, Doors

Services Offered: Window customization, Installation services

Quality Standards and Certifications: WERS

Bottom Line: Horizon serves architects, contractors, and other building professionals. Individual buyers can, nevertheless, still enjoy this manufacturer’s services by visiting their showroom or consulting virtually for less jargon-filled guidance.

Website: https://horizonwd.com.au/

Rylock stands out by manufacturing stunning windows with high-performance features. It manufactures all windows on custom order. Aside from architectural design, it works with clients to select the best energy-efficiency, security, and solar protection features for their windows. Rylock window designs also seek to elevate airflow, light transmission, and accessibility in every home.

Company Type: Manufacturer

Location: Dingley Village, Victoria

Products Offered: Windows, Doors

Services Offered: Consultation, Customization, Window replacement, Delivery, Site service

Quality Standards and Certifications: WERS

Bottom Line: Rylock services range from design consultation to installation and aftercare. They also provide window replacement and maintenance services. This makes them a prime manufacturer choice homeowners, architects, and residential building professionals. 

Website: https://www.rylock.com.au/

At MI Windows, variety and inclusivity take center stage. The company offers a variety of window types in different series. Each series has a defined package of features and a district price range. This makes it slightly easier to select your ideal windows as you only need to identify a window type and choose a series that has the right features and falls within your budget.

Company Type: Manufacturer

Location: Harrisburg, Pennsylvania, USA

Products Offered: Windows, Patio doors

Services Offered: Window customization

Quality Standards and Certifications: AAMA, NFRC

Bottom Line: MI Windows’s services are convenient for residential builders and homeowners alike, especially considering that they offer replacement windows. They have flexible lead times, too.

Website: https://miwindows.com/

Whether you are shopping for double-hung, casement, awning, or sliding windows, this manufacturer either has them in stock or can custom-make them. The company manufactures a wide range of vinyl windows in standard, ready-to-ship sizes, and also customizes windows to suit individual building projects. It is easily accessible online, thereby enabling buyers to select, order, and pay for their window orders at their convenience.

Company Type: Manufacturer

Location: Merrick, New York, USA

Products Offered: Windows, Doors

Services Offered: Window customization, 

Quality Standards and Certifications: AAMA, NFRC, FGIA

Bottom Line: North East Windows USA only supplies windows wholesale and, therefore, caters to building experts, architects, and retail resellers.

Website: https://northeastwindowsusa.com/

Working on a high-end residential project? Zola Windows’ award-winning windows may be exactly what you need. The company is a renowned manufacturer of luxury custom windows. They are designed to deliver awe-inspiring views, withstand harsh weather, provide security, and offer top-notch energy efficiency. 

While the windows are bespoke, Zola Windows’ choice of premium materials and engineering makes all the difference. So much so that its windows are Passive House-certified.

Company Type: Manufacturer

Location: Colorado, USA

Products Offered: Windows

Services Offered: Bespoke design, Window customization, Shipping & delivery, Installation services

Quality Standards and Certifications: Passive House

Bottom Line: Zola Windows mainly works with architects and contractors. It can, in some instances, serve homeowners directly if they can provide the requisite technical details. It also has a minimum order for each project.

Website: https://www.zolawindows.com/

Conclusion

Every top window manufacturer certainly has something to offer. It all comes down to whether they can accurately and effectively deliver the right windows for your projects. 

Further, as you compare different manufacturers, it is also essential to consider both current and future projects. It is undoubtedly better to establish a long-term relationship with a window manufacturer, such as Hotian, that can deliver a broad variety of quality, custom windows than a niche manufacturer that is only ideal for one project. 

Ready to get your project rolling? Contact us for a free consultation or a quote.