Secondary Glazing Cost Calculator
Calculate the noise reduction you need and get instant recommendations for the best soundproof window solution
Calculate Your Noise Reduction
Enter your details below to get personalized recommendations and cost estimates
Normal conversation: 60 dB | Busy traffic: 70-80 dB | Aircraft: 90+ dB
Not sure what your noise level is? Use our Decibel Guide →
Quiet library: 40 dB | Bedroom at night: 30-35 dB | Recording studio: 20-25 dB
Compare All Window Types Side-by-Side
Use our interactive comparison tool to see detailed specs, pros & cons, and cost breakdowns for all window types including secondary glazing, inserts, and acoustic glass.
View Comparison ToolVisualize Your WindowsUnderstanding Noise Reduction
What is STC?
Sound Transmission Class (STC) is a rating system that measures how well windows reduce noise. Higher numbers mean better noise reduction. Standard single-glazed windows have STC 25-27, while our acoustic solutions range from STC 38-55+.
What Does dB Reduction Mean?
Decibels (dB) measure sound intensity. A 10 dB reduction is perceived as a 50% reduction in loudness. A 20 dB reduction makes noise sound 75% quieter, and 30+ dB reduction makes most external noise barely noticeable.
Learn more about decibels and noise measurement →
How Accurate is This Calculator?
This calculator provides estimates based on standard acoustic engineering principles and 25+ years of installation data. Actual results may vary based on room acoustics, installation quality, and other factors. Contact us for a professional acoustic assessment.