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Hinged Casement

Hinged Casement

Features a single handle operation and multi-point locking Get a Quote

Our most discreet secondary glazing product, with 72mm sight lines and no transoms or mullions. Side and base opening is also available.

With no transoms or mullions to spoil the view, our Heritage hinged unit provides a truly unobtrusive secondary glazing system. They retain the character of your existing primary windows, whilst delivering great acoustic performance, enhanced thermal efficiency, condensation control, and enhanced security.

Heritage hinged units can be supplied with the hinges positioned left or right, or top-hung to suit your existing windows. Hinges can also be butt style to provide 180º/90º opening, plus they’re designed to avoid hinge-drop, to ensure maximum durability.

This is an extremely advanced secondary glazing system. Our hinged units are capable of supporting up to 120kg in weight, making them a popular choice with many of our commercial clients.

Units are fully square and sealed, whilst a single operating handle (positionable at any height) ensures easy access for large-scale systems.

Panel options

Traditional Hinged Unit (HU)

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Heritage Hinged Unit (HHU)

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Double Heritage Hinged Unit (DHHU)

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Clear benefits

65% reduced heat loss

Using 28mm double glazed sealed unit, with 80mm glass-to-glass optimum U Value:0.97 W/m2K.

80% noise reduction

Using 6.4mm acoustic laminate glazing, with 200mm glass-to-glass optimum Noise Reduction: 54dB (Rw).

Maximum frame sizes

Traditional range

Heritage range

Hinged Casement

Features & Options

5 Year Warranty

All windows come with a five year warranty on frames and glazing.


Our local partners can deliver and install at your convenience.

RAL colours

Aluminium frames can be finished in the full range of RAL colours.

Glazing can be specified from 4 - 8.8mm, to meet thermal and acoustic demands.

Cleaning and maintenance

Cleaning and maintenance is made simple with easy to lift out panels.


Windows can be face-fixed or reveal-fixed, to suit your preference.

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