Sound Insulation Calculator
STC improvement from insulation type in wall assembly.
Inputs
sq ft
Results
Final STC rating
40
Perceived noise reduction
38%
Base STC (before treatments)33
STC improvement7 points
Material cost$132.00
RatingFair — loud speech heard as murmur
How to Use This Calculator
- Enter Wall assembly, Single 2×4, drywall each side (STC 33), and Single 2×6, drywall each side (STC 37).
- Set Single 2×4, double drywall one side (STC 38), Staggered stud 2×4 (STC 46), and Double 2×4 wall with gap (STC 50).
- Adjust Insulation type, None as needed.
- Review Final STC rating and Perceived noise reduction (%).
- Use Base STC (before treatments) and STC improvement (points) to inform your decision.
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