Aluminium Casement Windows are a leading window system designed for the modern home. They are super slim and secure, exceeding Part L compliance.
Aluminium Casement Windows can be used in a variety of configurations, including side hung openers, French casements, and standard casements. They can be glazed from the inside or outside for easy installation. Aluminium Casement Windows come in a variety of colours and glazing options. You can choose from double or triple glazed windows, with integral blinds or astragal bars.
If you would like to know more about Pinnacle Windows’ Aluminium Casement Windows, then please don’t hesitate to get in touch.
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Ultra slim 59 mm sightlines for opening windows (and 36.5 mm for fixed frames) — letting light flood into interiors.
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Patented corner alignment / construction eliminating misaligned corners; each unit is hand-tuned for perfection.
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Incorporates Thermlock® multi-chamber thermal design acting as a thermal break for enhanced insulation.
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Standard security: PAS24:2016; optional laminated glass upgrade for Secured by Design accreditation.
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Available in casement, French, and fixed styles (opening & fixed combinations) with both beaded and beadless options.
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Sightlines & U-values:
• Fixed frame: 36.5 mm / 49 mm
• Beadless casement & French: 59 mm
• Beaded casement & French: 60.5 mm
• U-value (double glazed): ~ 1.5 W/(m²K) (WER A)
• U-value (triple glazed, where available): ~ 1.1 W/(m²K) (WER A+)
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A deeper 72–80 mm frame width system, suitable for a wide variety of styles including casement, French, tilt & turn, and fixed windows.
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Patented corner construction using threaded screws, eliminating corner misalignment; each window is hand-tuned for quality.
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Built for security: full-depth eurogroove for multipoint locking, hinge protectors, optional laminated glass upgrade for Secured by Design.
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Incorporates Thermlock® multi-chamber thermal design, combining aluminium aesthetics with high thermal performance (up to A+ rating).
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Sightlines & U-values:
• Picture windows: 46 mm, 60 mm, 70 mm
• Casement & French: 88 mm, 102 mm, 112 mm (depending on style / outer frame)
• Tilt & Turn: 95 mm, 109 mm, 119 mm
• U-value (double glazed): ~ 1.4 W/(m²K)
• U-value (triple glazed*): ~ 1.0 W/(m²K) (*in certain styles)
ALUNA windows are available in any RAL colour upon request. Perfectly complementary with our other products, the standard colours that we have in stock are Grey 7016 (Matte), Black 9005 (Matte), White 9016 (Gloss), Grey 7016 (Matte) on White 9016 (Gloss), Black 9005 (Matte) on White 9016 (Gloss), Textured Grey 7016 and Mill Finish.
Some of the most popular applications that can be made from the Aluna window system are listed below but there are many more besides. Please refer to the configuration diagram.
- Can be used as a side light with openers and easily couples to our Aluna bifold door system.
- Side hung opener next to a fixed frame.
- French casement window with double side hung openers.
- Standard casement window – top opener over a fixed frame.
- Crucifix 4-pane window with 2 top openers over 2 fixed frames.
All configurations of the SHEERLINE window system can be finished in several glazing options to create a style that suits any property. Choose from:
- Double glazed
- Triple glazed
- Integral blinds
- Heritage look astragal bars
- Solid panel inserts
Laminated glass for enhanced security / Secured by Design for Sheerline options (Classic / Prestige)
| Frame-to-sash sightlines | 82mm, 70mm |
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| Max. sash height | 1500mm |
| Max. sash width | 1500mm (top hung) 900mm (side hung) |
| Max. sash weight | 50kg (top hung) 40kg (side hung) |
| Max. glazing thickness | 28-44mm |
| Types of glazing | External/reverse adapter/dummy sash |
| Frame depth | 81mm flush / 73mm standard |
| Sash depth | 73mm |
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Sightlines: Picture: 46 / 60 / 70 mm; Casement/French: 88 / 102 / 112 mm; Tilt & Turn: 95 / 109 / 119 mm
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U-values: ~1.4 W/(m²K) double glazed; ~1.0 W/(m²K) triple glazed (some styles)
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Outer frame options: flush or standard
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Concealed drainage, concealed ventilation, cill flush finish options
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Fixed frame sightlines: 36.5 / 49 mm
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Casement / French: 59 mm (beadless), 60.5 mm (beaded)
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U-values: ~1.5 W/(m²K) double glazed, ~1.1 W/(m²K) triple glazed (in available styles)
| Thermal Efficiency | Window Energy Rating (WER) of A, which complies to Part L. |
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| Weather Tightness | Air permeability Class 4 (600 Pa) EN1 026:2000, EN 12207:1999 |
| Water Tightness | Side-hung: Class 8A (450 Pa) Top-hung: Class E1500 (1500 Pa) EN 1027:2000, EN 12208:1999 |
| Wind load resistance | Side-hung: Class C5 (2000 Pa;1/300) Top-hung: Class CE2400 (2400 Pa; 1/300) EN 12211:2000, EN 12210:1999 |
| Security | PAS24: 2022 (class W) |
Sheerline Classic & Prestige — Aesthetic Flexibility & High Performance
Our adoption of the Sheerline aluminium systems allows us to provide ultra-slim, high performance windows with exceptional thermal efficiency and security. Classic offers a refined, minimalist aesthetic with slim sightlines and strong insulation via Thermlock®. Prestige combines deeper profiles with enhanced versatility (tilt & turn, multipoint locking) and excellent thermal performance. Together, they perfectly complement our broader aluminium range and give our customers more choice without compromise.
Pinnacle Windows is a distinguished windows manufacturer in Wellingborough, known for delivering exceptional quality and craftsmanship. Our commitment to excellence is evident in every window we produce, tailored to enhance both the aesthetic and functional aspects of your home. With extensive experience in the industry, our team ensures precision and reliability in every product. We use only the finest materials, guaranteeing durability and performance. At Pinnacle Windows, we understand the importance of bespoke solutions, offering windows that not only elevate your home’s appearance but also provide long-lasting quality. Trust us to be your partner in enhancing your home with superior windows.