Quality Windows from Trusted Manufacturers
At Window Monkey, we take pride in supplying high-quality windows from carefully selected manufacturers. Our reputation is built on trust, and that’s why we only partner with brands that meet our high standards for craftsmanship, reliability, and service. Many of our manufacturers have been with us for over a decade, proving their commitment to both quality and trade-friendly support.
On this page, you’ll find a selection of top window products from our trusted manufacturers. Each brand offers a range of styles to suit different needs, from energy-efficient designs to premium aesthetics. We’ve highlighted some of the most popular options below, but if you're looking for something specific, get in touch. We’re here to help.
Garrard Windows - Trusted Quality for Over 15 Years
We’ve partnered with Garrard Windows for over 15 years, and for good reason. As one of the most respected manufacturers in the region, they are known for their reliability, precision, and commitment to quality. Garrard offers both PVC and aluminium windows, using the trusted Liniar Profile for PVC and Smarts Aluminium for their aluminium range. Their extensive experience and trade-focused approach make them a top choice for installers looking for durable, high-performance windows.
Explore some of their most popular window options below.
uPVC Casement Windows
uPVC Casement Windows are the most popular choice in the UK, offering a classic and reliable solution for home improvements. With a market-leading, multi-chambered uPVC profile, these windows are designed to be more energy-efficient, using less steel than traditional frames. Featuring Liniar’s patented, co-extruded bubble gasket, they provide excellent draught-proofing, ensuring your home stays warm and comfortable. The versatility of uPVC casement windows shines through with a range of configurations, including fixed or opening panes, top or side-hung sashes, and options for bay or bow windows. They can also be customized with mock sash horns, astragal or Georgian bars, and patterned or etched glass, allowing homeowners to create a personalised look that suits both traditional and contemporary styles.
Liniar Resurgence Flush Sash
The Liniar Resurgence flush sash window is a true innovation, combining the timeless charm of traditional timber windows with the benefits of modern uPVC technology. As the UK's first double-rebated uPVC flush sash, it offers exceptional security, energy efficiency, and weather performance. The unique double-rebated seal eliminates visible gaskets, providing a cleaner appearance and superior insulation. With an expansive range of colour options, including woodgrain foils, Resurgence windows add stunning kerb appeal to any home, whether traditional or contemporary. Fully foiled on the interior, they deliver a realistic timber look even when open. Perfect for larger projects, Resurgence is also fully colour-matched with Liniar’s entire product range, ensuring seamless compatibility.
Smarts Alitherm 400
Combining exceptional value, performance, and security, Alitherm 400 windows offer a range of stylish, energy-efficient options perfect for residential and light commercial properties. Designed with co-extruded gaskets in the sashes, outer frames, and Smart Quick-Glaze Beads, they ensure easier fabrication and faster installation. Available in a variety of styles—standard, slimline, flush, heritage sashes, and a tilt-turn window option—Alitherm 400 provides unparalleled flexibility. Fully compliant with the latest Building Regulations (Document L) and PAS 24:2022 approved for enhanced security, these windows offer excellent thermal and weather performance. With a vast array of colour choices, Alitherm 400 windows are the ideal solution for both new build and refurbishment projects, providing architects, developers, fabricators, and installers with both elegance and top-tier security.
Origin Aluminium Windows – Tailored Elegance and Unmatched Performance
As the UK’s leading brand of aluminium windows, Origin offers a stunning range of beautifully crafted, bespoke aluminium casement windows that are perfect for any property style. Whether you're enhancing a new build, renovating a period-style cottage, or upgrading an existing home, Origin windows provide the perfect blend of modern aesthetics and superior performance. With over 150 RAL colours to choose from, plus the finest premium-grade aluminium, you can customize your windows to suit your exact design preferences.
Origin’s aluminium casement windows offer exceptional thermal efficiency, helping to keep your home warm in winter and cool in the summer. Available in slimline or premium ranges, each window is tailor-made to your specifications with configurations such as side-hung, top-hung, and dual-colour options. With industry-leading guarantees of up to 20 years, unmatched security features, and low-maintenance durability, Origin windows are the perfect choice for those seeking elegance, reliability, and sustainability.
Proudly manufactured in the UK at their Buckinghamshire facility, Origin windows deliver the highest standards of craftsmanship and performance, offering unbeatable lead times and bespoke designs that are made to last.
OW70
The Origin OW-70 Slimline Window offers one of the slimmest profiles on the market, with ultra-slim sightlines of just 65mm, maximising natural light and providing clearer views. Made from premium-grade aluminium, the OW-70 is not only strong and durable but also offers outstanding thermal performance, exceeding current building regulations with a U-value of 1.2 W/m2K when triple-glazed. Completely bespoke, the OW-70 is available in a wide range of configurations, sizes, and over 150 RAL colours, allowing you to tailor your windows to suit your style. With an industry-leading 20-year guarantee, advanced police-backed security, and low maintenance, the OW-70 combines modern design with high-performance efficiency to complement any home.
OW80
The Origin OW-80 Premium Window is a fully bespoke aluminium casement system, offering superior strength, security, and energy efficiency. Featuring an industry-unique internal and external flush casement, it delivers a sleek, modern aesthetic while maximising natural light. Made from premium-grade aluminium, the OW-80 is low-maintenance, highly durable, and resistant to warping or corrosion. With an industry-leading 20-year guarantee, PAS 24 and Secured By Design certification, and a high-quality Yale locking system, it ensures maximum security and peace of mind. The OW-80 also boasts exceptional thermal performance, with the option to upgrade to Aerogel technology for an impressive A++ energy rating and a U-value as low as 0.8W/m²K. Available in over 150 RAL colours, a variety of handle finishes, and multiple configurations—including fixed, bay, and French windows—the OW-80 is designed to enhance any home with both style and functionality.
Soho
The Soho Window blends timeless industrial aesthetics with modern performance, featuring a sleek steel-look design, flush external casement, square internal bead, and true integral glazing divides for a refined, minimalist finish. Designed for exceptional thermal efficiency, it achieves U-values as low as 0.8 W/m²K, matching the performance of the OW-80 while maintaining a more slimline appearance.
The Soho Window is available in a range of popular colours, including Anthracite (7016M), Black Grey (7021M), Jet Black (9005M), Textured Black (9005T), and Hipca White (9910G/M), as well as over 150 RAL colours for full customization.
Tested to the highest standards, the Soho Window boasts Class 4 air permeability, Class 9A water tightness, and Class AS wind loading, ensuring lasting performance in all conditions. Whether you’re looking for style, security, or energy efficiency, the Soho Window is the perfect balance of heritage design and cutting-edge technology.
More Options, More Flexibility – Additional Window Systems
While we showcase some of the most popular window systems from leading manufacturers, we understand that every project has unique requirements. That’s why we don’t limit ourselves to just one or two brands. Instead, we source a diverse range of window systems to ensure our customers stay competitive in the market.
Below are three additional high-quality window systems we supply, offering a mix of style, performance, and affordability. However, if you’re looking for a system that isn’t listed here, don’t hesitate to ask—we may be able to source it for you through our extensive network of manufacturers.
Residence 9
Residence 9 (R9) is the UK’s leading timber-effect uPVC window system, designed to combine traditional aesthetics with modern performance. With its 100mm frame depth and unique 9-chamber design, R9 delivers A++ energy efficiency and U-values as low as 0.7, making it a top choice for conservation projects and high-end properties. The system boasts an externally flush finish, a decorative internal profile, and fully foiled ‘easy clean’ rebates, ensuring an authentic 19th-century look. Our R9 windows are mechanically jointed, providing a more traditional aesthetic while also making installation easier. Available in single or dual colour finishes like Grained White, Painswick, and English Oak, and complemented by heritage-style hardware options such as Monkey Tail and Pear Drop handles, R9 offers a premium solution for homeowners who demand both style and performance.
Residence 7
Designed for heritage properties and conservation areas, Residence 7 (R7) offers a luxury timber-alternative window with a sleek, flush finish both internally and externally. With a 75mm frame depth and 7-chamber design, R7 provides A++ energy efficiency and U-values as low as 0.7, ensuring outstanding thermal performance. Unlike other Residence systems, R7 is always flush on the inside, creating a refined and streamlined look. The welded mechanical joints enhance its authenticity, making it an ideal choice for homeowners seeking traditional aesthetics with modern low-maintenance benefits. Available in 28mm double or 44mm triple glazing, R7 expertly balances heritage style with 21st-century efficiency and durability.
Sliding Sash Windows
Spectus Legacy uPVC sliding sash windows perfectly blend the charm of classic timber sash windows with modern performance, security, and efficiency. Offering optional extras such as deep bottom rails, run-through sash horns, and slim midrails, these windows deliver heritage styling that makes them ideal for period properties and conservation areas. Featuring mechanical or mitre-welded joints, they replicate the look of traditional joinery while maintaining low-maintenance durability. With A-rated energy efficiency, 1.2 U-values, and PAS 24 security upgrades available, Quickslide sash windows provide comfort, safety, and long-lasting quality. The innovative slide-and-tilt facility ensures ease of use and maintenance, making them a timeless yet practical choice.
