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The Case of Reducing Outside Noise

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Dear Glass Detective,

I have noise through my bedroom windows from condo air conditioners outside. I am considering another layer of glass to the windows and am considering laminated glass vs. solid glass. Please tell me which is better for sound reduction or if this is even a good idea? Merry Christmas and Happy New Years!

Thanks for your help.




Thank you so much for reaching out to the Glass Detective and for your kind remarks as well. Now for your question as to whether or not laminated glass may be of help in reducing the amount of noise you are getting from condo air conditioners outside your home, the quick answer is YES. The Outdoor-Indoor Transmission Class (OITC) Ratings are significantly improved in most situations by the use of laminated glass in lieu of non-laminated glass products of similar thicknesses.

HOWEVER, there are a few questions that need to be answered regarding what might be your best approach to all of this and at that point, a reliable and knowledgeable glazing contractor is your best resource. They can examine your existing framing to see if a reglazing (glass replacement or retrofit) is the best approach and can provide you with pricing alternatives as well. I have personally been involved with buildings near or at airports as well as next to downtown elevated train systems where laminated glass was successfully used to greatly reduce sound levels. I wish you well with your project and if you get a chance, let me know what you did and how it worked out.

The Glass Detective attempts to answer all questions accurately but cannot be held liable for misinformation. You should always work with a licensed, insured and reputable glass shop who can assess your specific needs and local building codes and offer professional services. Never attempt to cut, install, or otherwise work with glass yourself.

Please note, this article may contain links to Amazon products. As an Amazon Associate, earns from qualifying purchases.



Lyle Hill

Lyle Hill has been in the glass and metal industry for more than 40 years. In this time he has managed glass retail, contract glazing, mirror, architectural window, window film, and automotive glass businesses throughout America. He obtained an MBA from IIT with a focus on Technology and Engineering Management. Hill is also a columnist for glass industry trade magazines and often called the “face” of the glass industry. He has also authored books including “The Broken Tomato and Other Business Parables,” which is available through Amazon. Find out more about Lyle on Linkedin.

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