Exploring Soundproofing Materials: Windows
We’ve spoken before about using windows as part of your soundproofing efforts, but the subject deserves another go-around.
To clarify, while sound proof windows do exist, they are not necessarily going to solve your sound problems.
Most people find that their problems are around the windows - because they’re not properly sealed. Others simply have old windows with poor glass. In that case, you can simply add a second layer of glass over the first, creating a gap of about 1 inch in between. In most cases, that works better than replacing the windows altogether!