Core idea: Understand impact insulation ratings and their limits.
Standard test
IIC uses a standardized tapping source and sound measured below.
Assembly effect
Finish, underlay, structure, ceiling and flanking all contribute.
Field variation
Real footsteps differ from the test source.
Condo use
Follow the corporation-approved complete floor assembly.
A practical planning sequence
- Describe the source, timing and frequency character.
- Trace direct and flanking paths.
- Set a realistic improvement goal.
- Compare complete systems and local requirements.
- Document the baseline and inspect details during work.
- Repeat the same test afterward.
What cannot be guaranteed online
No website can promise a specific reduction in an unknown building. Field results depend on construction, workmanship, connected structures, openings and the source.
Written by Martin R. Calderwood.