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Aluminium Casement Windows

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Slim-frame Casement
Windows

Our slim-frame casement is an aluminium casement window with slim contemporary frames and strong thermal performance.

 

Available in side-hung and top-hung configurations, with options for fixed panes, bays, and shaped units, it is ideal for both replacement projects and new construction.

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Key features

  • Narrow sightlines

  • Double and triple glazing with U-values as low as 0.9 W/m2K

  • High security PAS24

  • Slim and heavy-duty options accomodating window openings up to 1800 x 1800

  • Wide range of RAL colours and finishes

Configurations

Configurations available:

  • Fixed pane

  • Side-hinged

  • Top-hinged

Fixed pane

 

 

 

Side-hinged

 

 

 

Top-hinged

Casement configurations

Specifications

General

  • Air permeability (EN 12207): Class 4

  • Water tightness (EN 12208): Class E1200

  • Wind resistance (EN 12210): Class CE2400

  • Security: PAS24

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  • Glazing: 23 - 44mm​

  • Thermal UW ≥ 0.9 W∕m2K

Slim Casement

  • Frame depth: 70mm

  • Sightline: 70mm

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  • Max sash width (top hung): 1200mm

  • Max sash height (top hung): 1300mm​​​​​​​

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  • Max sash width (side hung): 950mm

  • Max sash height (side hung): 1300mm​​​​​​​

Heavy duty casement

  • Frame depth: 70mm

  • Sightline: 80mm

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  • Max sash width (top hung): 1800mm

  • Max sash width (top hung): 1800mm

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  • Max sash width (side hung): 1750mm​​​​​​​

  • Max sash height (side hung): 1750mm​​​​​​​

Contact Us

Please contact a member of the team to discuss your project:

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Blackdown,

Leamington Spa

CV32 6RW

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©2026 by Portico Architectural Ltd

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