Core idea: Compare sealing, secondary glazing and replacement units for exterior noise.
Leakage first
Failed seals, open vents and frame gaps can dominate performance.
Glass and air space
Complete tested units matter more than one pane specification.
Secondary windows
An interior panel can create a larger air space with less exterior work.
Other facade paths
Traffic may also enter through walls, roofs, vents and doors.
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.