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Devils Peak Slim 25
Triple Glazed Sliding Door System

Cape Glass’ Devils Peak Slim 25 Triple Glazed Sliding Door System, is a premier, ultra-slim aluminium sliding door system designed for high-end residential and commercial projects. 

 

Devils Peak Slim 25 is a triple glazed sliding door system. It focuses on maximizing glass surfaces - up to 94% of the total aperture - through a 25mm central interlocking profile. 

 

We can help you design this to fully conceal the outer frames with your building finishes.

Engineered for large-scale openings, it offers superior thermal, acoustic, and structural performance compared to standard slimline systems. Security PAS 24 Certification: The system meets British approved PAS 24 standards, ensuring it can withstand physical attack. Multi-Point Locking: Features a 5-point locking system operated by a rod, with options for key-operated mechanisms on both the inside and outside. Anti-Lift Measures: Designed with high-performance runners that ensure the panels cannot be lifted off their tracks from the outside when in the locked position. Glass Security: The system typically uses toughened or laminated safety glass, reducing the risk of easy penetration. Performance High Thermal Efficiency: Achieves U-values as low as 0.9 W/(m²K), making it highly suitable for low-energy and passive house projects. Superior Weather Resistance: Classed as 7A or 9A for water tightness and C3/C4 for wind resistance, protecting against harsh weather conditions. Acoustic Insulation: Reduces external noise by up to 43 dB. Large Panel Capability: Supports massive panes, with maximum dimensions up to 4m x 4m (height/width) and weight capacities of 400kg (manual) to 700kg (motorized). Glazing Thickness: Accommodates triple glazing up to 56mm, maximizing both soundproofing and energy efficiency. Benefits Over Other Slim Sliding Door Brands Slightly Thicker Structure for Larger Sizes: Compared to our double glazed Lions Head Slim 20 Sliding Door System, the Devils Peak Slim 25 version’s 25mm interlock allows for bigger, heavier panes (4m x 4m) without sacrificing the minimalist look. Superior Motorization: The Devils Peak Slim 25 Sliding Door System offers a hidden motorization option for heavy 700kg panes, a feature not available in the Lions Head Slim 20 Double Glazed Sliding Door System. Fully Concealed Frame: The perimeter frames can be completely embedded in walls, floors, and ceilings for a "frameless" appearance, which is more advanced than systems with visible outer frames. 90° Corner Solution: Ability to create a corner meeting point without a mullion (corner post), allowing for seamless, panoramic views. Versatile Drainage: The threshold can be fully embedded for a flush floor transition, with integrated drainage options to prevent water ingress. Additional Features Operation: Available with manual (up to 400 kg) or high-capacity motorised opening. Configurations: Single, double, triple, or four-track arrangements, allowing for 2–6 sliding sashes or pocket solutions (where doors slide into the wall). Finishes: Available in the full RAL colour range, anodized, textured, wood-effect, and anti-bacterial coatings. The Devils Peak Slim 25 Triple Glazed Sliding Door System represents a "Grand Designs" style product that balances modern, minimalist aesthetics with high-performance specifications, often positioned as a more accessible alternative to extremely high-end, premium-priced brands.

Frameless glass balustrades

Cape Glass Ltd  |  E: hi@capeglass.co.uk  |  M: 07549179310  |  Company Number: 13894803  |  VAT Registered: 424834788 

Registered address: 12 Highwoods Drive, Marlow, SL7 3PY

Works, office & showroom: Hickenham Farm, Littleworth Road, SL1 8PG

 *Visits by appointment only please. We are a small team with all hands on deck. Make sure we are not out on site surveys or site visits. 

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©2026 by Cape Glass Ltd

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