Smart window insulation for listed buildings with polycarbonate

The Project
Jan fixed 5 mm polycarbonate secondary glazing to the inside of his internal shutter using wood and glue. This approach is unique because installing double glazing is prohibited in his listed building. Jan explains, “We live in a historic building where you can't alter the original window or frame. Installing double glazing is not allowed, although we were permitted to add internal shutters.”
Here’s a step-by-step guide to help you through the process
Attach
Fix the sheet
Paint
Secure

Tools
- Brushes
Other requirements
- Internal shutters
- Pine wooden slats
- Paint
- Glue
- Keyhole hangers
“Four keyhole hangers are attached to the back of the frame. This allows the frame to be easily slid off the shutter. This way, both the shutters and the plastic window are always accessible for cleaning.”
“Four keyhole hangers are attached to the back of the frame. This allows the frame to be easily slid off the shutter. This way, both the shutters and the plastic window are always accessible for cleaning.”
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