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Author Topic: Magnetic acrylic vs laminated glass soundproof windows  (Read 15090 times)


  • Guest
Magnetic acrylic vs laminated glass soundproof windows
« on: May 05, 2011, 04:21:27 PM »

I'm looking to soundproof 4 upstairs windows with either Magnetic acrylic ( window insert or with a laminated glass window insert ( but I'm not sure which provides better soundproofing. I can't seem to find a comparison between the two technologies anywhere. Of course the magnetic window claims up to 70% sound reduction and the glass window guy claims they don't do anything so no help there. I was somewhat concerned when the magnetic window person said that there would be no difference between mounting the window 1.5" or 3" away. Everything I've read says the further the better.

Given this is a $250 (magnetic window) vs $750 (glass window) per window decision I'd like to know if the glass window is really worth the extra cost. Anyone done any comparison between these two types of window inserts?

Randy S

  • Guest
Re: Magnetic acrylic vs laminated glass soundproof windows
« Reply #1 on: May 05, 2011, 09:17:11 PM »

Well there is a huge flag who NOT to use...Dead air space dictates the true value of a sound controlled window system.


1/4" laminate / 1" airspace / 1/4" laminate = STC 37
1/4" laminate /2" airspace / 1/4" laminate = STC 43

The main transmitter in this system is the window frame itself...

In studio window systems you can have dead air space as large as 8"-18"

The most important part of achieving optimal sound isolation would be the seals on the main window and the insert system...any leaks and you will have little reduction value.

Installation is the KEY to reduction!!!!


  • Guest
Re: Magnetic acrylic vs laminated glass soundproof windows
« Reply #2 on: March 04, 2015, 10:10:49 PM »

I've been reading a lot about soundproof window inserts and I'm beginning to get confused.  Please correct me if I'm wrong.  More mass equals better sound reduction.  Therefore, a thicker window pane is better than a thinner one.  Glass works better than acrylic because glass is heavier.  Laminated glass and acrylic reduce sound transmission by altering the vibrations.  The more dead air space between the panes, the greater the sound reduction, so the "deeper" the window, the better.

Assuming I'm on the right track, here's my situation.  I live in an apartment near a busy street.  The biggest problem is traffic noise from trucks, motorcycles, and loud, booming car stereos at all hours.  I've looked into various types of window inserts for the 2 large windows in front of my apt. which face the street and found a wide range of options and prices.  I've read that glass is better specifically for reducing low frequency noise like that from mobile sound systems, but I need something that will be relatively easy to install and remove, and I have a limited budget.

Currently I have very basic 35" x 70" aluminum windows with double-pane glass.  I have room to install an interior window insert with about 3 in. of air space.   Laminated glass inserts are almost twice the price of the acrylic ones.  All other factors being equal (same install, thickness, etc.), would using laminated glass instead of acrylic make a significant difference in the end result?

Randy S

  • Guest
Re: Magnetic acrylic vs laminated glass soundproof windows
« Reply #3 on: March 04, 2015, 10:28:37 PM »

I can understand your confusion,

You are on the right track, laminated glass does work better then acrylic but the down sides are it is harder to remove and put back in and if it falls the chances of it breaking are high and therefore having to purchase another piece, not to mention safety...

This is why we use acrylic 3/8" thick for road noise.

Randy S.