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Author Topic: Soundproofing window  (Read 4604 times)


  • Guest
Soundproofing window
« on: April 22, 2013, 02:32:55 PM »

Thanks to SuperSoundproofing for providing this forum.

I have problems with traffic noises, living next to a busy street, and found this helpful forum. (Please feel free to correct me) From reading the post/answer, appears there are 2 problems:

- The high frequency noises, especially the tire noise, then the engine
- Low frequency from rumbling trucks, motorcycles, SUV muffler.

For the high frequency noises, if the window seems to be the weak point, the solution seems to get more barriers, may it be the Magnaseal system or more layers of glass, with air gap and lamination. I chose the window system.

There are different provider for the glass windows, but the choice appears to be 2 main solutions:
-another window inside (or outside) of the existing window, by different companies (SoundProof, Citiquiet....)
-replacing the existing window with Millgard Quiet Line, which to my understanding, is a combination on 2 glass window separated by an air gap, in the same window frame. To me it seems to be a more elegant solution(I do not know how much it cost yet, and I do not work for Millgard). However, I am surprised that there are so few comments (at least that I can find) about the experiences by the other posters about the Millgard Quiet Line, especially any comparisons (based on real world experiences)

Please comment, I would be very appreciative of a quieter house. Thanks.

Randy S

  • Guest
Re: Soundproofing window
« Reply #1 on: April 22, 2013, 03:52:51 PM »

It is not so much the provider of the window or glass that has the greatest out come for noise reduction, it is the principle and the system as a whole.
When working on single frame construction you will have a quick diminishing point of return because the actual window box the window is installed in still shares the source and receiving side therefore is the weak spot so to speak.
When doing windows and doors the object is to achieve the greatest air space between the 2 windows as possible (just like you see on a commercial airliner). as long as both windows have quality seals and you maximize the air gap this will be the best you can get without building a double wall and independent window boxes.


  • Guest
Re: Soundproofing window
« Reply #2 on: April 22, 2013, 11:20:11 PM »

Great explanation of the underlying reason. Thanks Randy.

I would like to hear the experiences of peoples with same problems, and their actual results, especially Milgard Quiet Line versus other window manufacturers. Hello guys. Please share your experiences/comments/advices.



  • Guest
Re: Soundproofing window
« Reply #3 on: April 23, 2013, 09:16:51 PM »

I ended up getting the magnetite system (similar to magnaseal) but I went with Magnetite because my window is large (6 feet wide and over 4 feet tall) and I wanted to split the acrylic panels into 2, so I can just remove one small panel (and attach it to the other panel) to open the window (magnetite supports this by having an extra T steel bar in the middle). I used 1/4 inch panels (their commercial product since their home product only supports 1/8 inch panels) and they are heavier than I thought. I have a 3.5 inch gap between it and the original outside window.

Results are okay. I expected better as I can still hear the traffic noise (road and engine noise). I tried to seal the edges and everything looks good, but I'm not sure if I have an air tight seal (anyway to test this?)  Now I think about it, I should have went with a secondary window instead. It's a pain to remove the acrylic panel since it's so big and heavy and the magnet suction makes it hard to pull off. Also doesn't help that my blinds (bracket up top) get in the way in front of it. I also think the window would be easier to seal off. (My window frame box is not a straight square so it's a pain to cut the steel brackets correctly and not have air gaps) Also, Because it is so heavy, it scrapes against the bottom of the window frame/sill when I take it off.

I have some other windows to do and I don't have as much room to work with in the inside window frame. If I add a second window, it would only probably give a 1 inch air gap. I'm thinking of just spending the money and getting Milgard Quiet Lines and see how well those work.