Secondary Glazing
Thermal efficiency for your heritage home

Our secondary glazing system is designed specifically for period and heritage properties where preserving the original character of the building is essential. The discreet panes fit neatly into the existing sash window frame, sitting within the rebate so they remain virtually invisible from both inside and out. This makes it an ideal solution for homeowners who want improved comfort and efficiency without altering the appearance of their original windows.
Because the system requires no fixings, screws, or permanent alterations, it is particularly suitable for listed buildings and conservation properties. Each pane simply sits securely within the sash frame, meaning there is no damage to the original timber and the installation remains fully reversible. The result is a clean, minimal solution that maintains the historic integrity of your windows while delivering modern performance.
In addition to preserving the look of traditional sash windows, secondary glazing provides significant practical benefits. The additional pane creates an insulating barrier that can reduce heat loss by up to 50%, helping to keep your home warmer and more energy efficient. It also acts as an effective acoustic barrier, reducing external noise by up to 25%, making it especially beneficial for homes located near busy roads or in urban areas.
The glazing sits subtly within the pane sightline, meaning it remains hidden in the pane sight and does not interfere with the classic design of your windows. You keep the elegance and charm of your original sash windows while gaining improved insulation, noise reduction, and comfort throughout your home.

Frame
Custom Retro profile — lightweight extruded aluminium that matches the style of your window frame.
Pane
Clear-as-glass panel that sits at an insulating gap of 11mm away from your window trapping a layer of air, preventing heat from escaping and cold air from creeping in.
Surround
Ultra-grip seal that allows Retro Panes to slot securely in place without screws or adhesives.
Zero impact to aesthetics or opening mechanisms.

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