Alitherm Range
Precision Alitherm 400
The Precision Aluminium Alitherm 400 Window combines timeless aesthetics with advanced thermal performance. Perfect for both new build and refurbishment projects, it brings clean, contemporary styling and superb energy efficiency to any property.
view and download our extensive colour options here.
WER Rating = A+
U Value = 1.4
Document L Compliant = Yes
Side Hung Max Width (mm)864
Side Hung Max Height (mm)1400
Top Hung Max Width (mm)1400
Top Hung Max Height (mm)1500
Fixed Max Width (mm)2100
Fixed Max Height (mm)2100
Single Door Max Width (mm)1100
Single Door Max Height (mm)2400
Double Door Max Width (mm)2200
Double Door Max Height (mm)2400
Glazing (mm)24, 28, 32, 36, 40 & 45
Frame Depth (mm)70
Standard Windows
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Outward opening, top-hung or side-hung options for classic versatility.
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Slim frames maximise light and modern appearance.
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Excellent weather performance and thermal insulation.
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Ideal for residential and light commercial installations.
Flush Windows
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Sashes sit neatly within the frame for a smooth, minimalist look.
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Perfect for heritage or modern homes wanting a seamless finish.
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Enhanced thermal efficiency with fully weather-sealed design.
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Available in matching door systems for consistent aesthetics.
Tilt & Turn Windows
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Sashes sit neatly within the frame for a smooth, minimalist look.
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Perfect for heritage or modern homes wanting a seamless finish.
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Enhanced thermal efficiency with fully weather-sealed design.
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Available in matching door systems for consistent aesthetics.
Why Choose Precision Aluminium Alitherm 400 Windows
Discover the ideal balance of style, performance, and practicality with the Alitherm 400. Using Smart Systems’ latest thermally broken profiles, this system achieves outstanding U-values and meets current Part L Building Regulations for thermal efficiency. Its modern, clean lines suit every architectural style—from traditional homes to sleek extensions—while delivering long-term durability and low maintenance.
Effortless Quoting & Installation
Our friendly team make every stage simple, from design to delivery. The Alitherm 400 is engineered for straightforward fitting and reliable performance, reducing time on site while ensuring a premium finish. You’ll have direct support from our experts by phone or WhatsApp whenever you need it.
Sleek Sightlines & Design Flexibility
Available in a variety of configurations and opening styles, the Alitherm 400 provides slim frames for maximum light and visibility. Choose from a full palette of durable powder-coated finishes, dual-colour options, and hardware styles to match your project perfectly.
Fast Lead Times & Reliable Support
Count on prompt delivery and responsive technical assistance from our experienced team—ensuring every project is smooth from inquiry to installation.
Why Precision Aluminium?
Powder Coated
The powder-coated exterior of our aluminium doors not only offers a wide range of colours, but also provides a thicker, smoother, and more durable finish compared to standard coatings, ensuring long-lasting beauty and resilience in every climate.
Multiple Colours
We offer over 150 colours in matt, satin, or gloss, with the flexibility to choose different shades inside and outside for a completely customised finish that complements your home’s style perfectly.
Low Maintenance
From weather-resistant powder-coated aluminium to precision-engineered bearing-guided rollers, every detail is carefully designed to minimise upkeep and ensure your doors remain reliable, easy to use, and low maintenance throughout years of daily living.
Frequently Asked Questions
Precision Aluminium is a UK-based specialist in high-quality aluminium solutions for homes and businesses. We combine expert craftsmanship with precision engineering to deliver exceptional results.
We are located in Disley, serving customers across the UK. For larger projects, we can also work with clients globally.
Yes, we provide aluminium solutions for homeowners, builders, architects, and commercial property owners.
Yes, we provide aluminium solutions for homeowners, builders, architects, and commercial property owners.
Yes, we provide free, no-obligation quotes tailored to your requirements.
Absolutely. We can work with you to refine your design ideas, recommend the best aluminium solutions, and ensure everything meets building regulations.
Simply contact us via phone, email, or our online form and we’ll arrange a consultation to discuss your project.