Core idea: Account for plaster, irregular framing, services and hazardous materials.
Investigate
Older assemblies may hide voids, obsolete wiring, lead or asbestos-containing materials.
Preserve character
Secondary windows and reversible details may protect features.
Flanking cavities
Open wall and floor cavities can spread sound widely.
Qualified trades
Do not open suspect materials without assessment.
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.