A year round performance without replacing a single window

The transparent thermal roller is manufactured from a high-performance, UV-blocking transparent material that creates an additional insulating barrier across the window while still allowing natural light and external views to be maintained.

This means it continues to improve thermal performance even when the shutter louvres are fully open.

The plantation shutter itself provides a second layer of performance by allowing the louvres to be adjusted throughout the day to manage solar gain, helping to reduce overheating during the warmer summer months while maintaining comfort and privacy.

Together, these two elements create a truly multifaceted system that takes a whole-window approach to year-round comfort. Retaining heat during colder months, controlling excessive solar gain in summer, and allowing the user to adapt the system to changing weather conditions and seasons with ease.

 

The Principle Behind the System

Replacing windows is expensive, disruptive and sometimes prohibited in period or listed properties. Flutter Shutter takes a different approach.

The transparent roller blind combined with the plantation shutter form an integrated system that reduces heat loss, manages solar gain and improves the everyday comfort of any room, without altering the windows themselves.

Below we explain exactly how each function works.

 

Heat Retention

In colder months, single-glazed and older windows allow warmth to escape quickly. This drives up heating costs and leaves rooms feeling draughty.

The transparent thermal roller blind combined with the layer of insulating air between the glass and the blind slows the transfer of heat from inside to outside, helping your home retain warmth for longer.

The result is steadier indoor temperatures and reduced demand on your heating system.

By cutting heat loss through windows, Flutter Shutter™ can help you save up to £200 per year on energy bills* and supports a stronger EPC rating, all while keeping your existing windows in place.

Solar Shading

Large or south-facing windows can cause rooms to overheat in summer. Direct sunlight raises internal temperatures and can fade furnishings over time.

The plantation shutter gives you precise control over incoming light. Adjustable louvres let you filter, redirect, or block sunlight to suit the time of day. This reduces solar gain when you need to keep a room cool, while allowing light in when you want it.

This balance of shading and daylight control helps maintain a comfortable environment year-round, without relying on energy-hungry cooling.

*Flutter Shutter is a multifaceted product. The transparent thermal roller blind is to be fully retracted during the warmer months for optimal solar shading performance.

Ventilation

Flutter Shutter™ is an internally installed thermal secondary glazing shutter system designed to improve window thermal performance while maintaining the dwelling’s existing ventilation strategy.

The system is mounted within the internal window reveal and does not modify or obstruct the window frame, external façade, or any existing background ventilators such as trickle vents or air bricks. As a result, the installation does not reduce or compromise the equivalent area of ventilation required under Approved Document F.

To ensure continued airflow into the occupied space, Flutter Shutter™ incorporates integrated stoppers within the side guide system. These prevent the roller blind from descending fully flush with the windowsill and intentionally maintain a continuous ventilation gap at the base of the window opening. This design allows air entering through background ventilators to circulate freely into the room.

 

Comfort Improvement

Comfort is about more than temperature alone. Cold glass, draughts, glare, and noise all affect how a room feels.

By forming a barrier between the living space and the window, Flutter Shutter™ reduces cold spots near the glass and minimises draughts.

Rooms feel warmer in winter and cooler in summer, with fewer fluctuations throughout the day.

The plantation shutter also helps soften light and improve privacy, adding to the sense of a calm, well-managed living space.

For homeowners, this means premium comfort. For housing providers, it means improved living conditions for residents without major building works.

Why This Approach Works for Every Property

Flutter Shutter™ has been developed to suit a broad range of needs:

  • Comparable to triple glazing

    modern thermal performance, independently verified

  • Increases EPC rating

    supports a stronger energy performance score.

  • Without replacing existing windows

    no removal, no major disruption.

  • Preserves the character of your property

    ideal for heritage and period homes.

  • Saves up to £200 per year on energy bills*

    through reduced heat loss.

  • UK patented and independently tested

    proven, trusted, and recognised.

See the Difference for Your Property

Flutter Shutter™ delivers modern thermal performance, a stronger EPC rating, and year-round comfort, all without replacing your windows.

Book a survey today and discover how the system could work for your home or portfolio.

Book a Survey