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Author Topic: My soundproof window project, one window done, input please!  (Read 5225 times)

PianoProdigy

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My soundproof window project, one window done, input please!
« on: February 02, 2013, 01:20:41 PM »

I live on a busy road.  It curves south just past my home and turns into a historic brick/cobblestone surface that is very noisy, at least twice as loud as the cars are on the asphalt.  I started with an upstairs bedroom with only one window.  Used 3/8" plexiglass.  Had a woodworker friend make a wood frame so the plexi sits on the sill and is caulked in around there then another identical piece of wood (it actually might be a plastic-like material that bends). While I can subjectively tell it is a bit quieter, the results are not stellar.  I can still hear all the same noises just a bit quieter.  I'm not necessarily expecting it to be dead silent, but I expected better.  I have a cheap DB meter that I couldn't really quantify the difference well.

The existing windows are single pane and very thin.  Is there any benefit in caulking the windows closed from the outside?  I don't intend to open them, ever.

Here a few photos, thanks for any and all input.



Randy S

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Re: My soundproof window project, one window done, input please!
« Reply #1 on: February 05, 2013, 05:31:33 PM »

Yes go ahead and seal the primary window.. Your results depend greatly on two things, glass thickness minimum 1/4" thick and most important the amount of dead air space...how much of a gap between the two panels do you have?
Randy Sieg

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PianoProdigy

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Re: My soundproof window project, one window done, input please!
« Reply #2 on: February 05, 2013, 07:31:21 PM »

Existing window looks to be the thinnest possible glass, probably 1/16."  I didn't bother caulking since opening or closing the window results in almost no reduction in sound.  The panel pictured above is about 3.5" from the window.  There was a noticeable decrease in road noise but not acceptably so.

I then did a 3/8" plexi as close as possible to the existing window then another 3/8" sheet as far as possible on the sill so that the plantation shutters could still articulate which resulted in a 3 1/4" air gap.  The results were even better, but I still wasn't thrilled.  I am doing a large bay window in the streetside bedroom and two more windows in that bedroom  and then going to re-evaluate how much further I want to go with other windows in the house.

Randy S

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Re: My soundproof window project, one window done, input please!
« Reply #3 on: February 05, 2013, 08:18:49 PM »

Based on your statement, you might be a diminishing point of return..what is the wall assembly? when you hear noise do you still focus at the window or does it seam all around?
Randy Sieg

Super Soundproofing Co
www.soundproofing.org
888-942-7723
Ph. 760-752-3030
Fax.760-752-3040

PianoProdigy

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Re: My soundproof window project, one window done, input please!
« Reply #4 on: February 06, 2013, 03:10:38 PM »

It is block construction on the first foor then wood frame on the second floor.  It still seems as if the noise comes through the window rather than the walls but again, it is hard to say.  The front bedroom should be done today which is on the street side and the noisiest in the house.  Once all are done, I will report back with some photos.

basic_element

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Re: My soundproof window project, one window done, input please!
« Reply #5 on: February 25, 2013, 05:56:25 AM »

It is block construction on the first foor then wood frame on the second floor.  It still seems as if the noise comes through the window rather than the walls but again, it is hard to say.  The front bedroom should be done today which is on the street side and the noisiest in the house.  Once all are done, I will report back with some photos.

Hi PianoProdigy,

I'm curious how your project results turned out? Did the windows help with the street noise?

Thanks.!