Heritage & Sash Window Soundproofing Calculator
Get an instant rough estimate for acoustic secondary glazing — designed for Grade I, Grade II listed buildings and conservation areas.
Heritage & Sash Window Calculator
Get an instant rough estimate for acoustic secondary glazing — designed for listed buildings and period homes.
Estimates are indicative. Final pricing depends on site survey, access, and frame condition.
Why Secondary Glazing for Heritage Homes?
Planning-Friendly
Fully reversible internal addition — generally exempt from Listed Building Consent.
Original Windows Preserved
Your timber sashes stay untouched. 20mm slimline frames colour-matched to heritage palettes.
Up to 50dB Reduction
10.8mm acoustic laminate glass with 150mm air gap delivers recording-studio silence.
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