Windows: the usual weak link
Most road noise enters through glass and the frame seal — not through insulated stud walls. That makes windows the highest-leverage upgrade for many homes.
Inserts vs full replacement
- Interior acoustic inserts (compression or magnetic panels) add a sealed air gap. Brands in this category include Indow, Climate Seal, Magnetite-style systems. Removable; often condo-friendly.
- Replacement windows with laminated glass, mixed lite thickness, and compression seals can help — ask for published STC and OITC.
Ratings without the sales fog
- STC — good for mid/high frequencies (speech-ish).
- OITC — weighted toward traffic/aircraft rumble. Prefer this when buying for highways.
Expect noticeably quieter, not silence. Published stories often cite roughly 50–70% perceived reduction for quality inserts over single-pane openings — results vary with walls, roofs, and flanking paths.
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