Performance
Delivers measurable improvements in thermal insulation, noise reduction, and condensation control — backed by real-world data and satisfied clients across Scotland.
Heritage
Engineered for listed buildings and conservation areas, our system is fully reversible and visually discreet — meeting planning requirements without compromising original character.
Preservation
Retrofits cleanly behind original sash-and-case windows with no damage, no alterations, and no visible fixings — protecting historic fabric while improving comfort.
The CSG System
Conservation Secondary Glazing is an Edinburgh-based company specialising in high-quality, glass secondary glazing for listed and heritage buildings. Our discreet, retrofit system is patented and designed for sash and case windows and requires no planning permission. It delivers excellent thermal, acoustic, and condensation performance—without compromising the character of original timber windows. Fully reversible and conservation approved, our system preserves architectural integrity while bringing modern comfort to traditional homes.
Contact us to learn how we can enhance your historic property—without altering it.
Benefits
Noise Reduction
- Up to 10dB quieter
- Cuts traffic noise
- 5dB better than Perspex
Less Condensation
- Drier window surfaces
- Protects timber frames
- Reduces internal moisture
Thermal Efficiency
- Reduces heat loss
- Lowers energy bills
- Warmer, cosier home
Draught Proofing
- No more chilly draughts
- Keeps warmth inside
- Ideal for older frames
Get In Touch With Us
Interested in preserving your windows with modern comfort? Get in touch today for expert advice and a free quote.