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Author Topic: Sound proofing (dampenning) window - Internal Sutters vs laminated storm  (Read 3640 times)


  • Guest

My goal is to block *some* road noise with a semi permanent solution that can remain in place if/when we sell the home. The house is 4 years old and replacing the current windows is not an option.

I am looking at 2 options.
1) an internal MOL-OP storm window from Allied. It will have a 3/16 laminated panel - bottom portion operable. This window is mounted with magnetic tape
est cost: $2500

2) Custom made interior solid panel wooded shutters. The shutters would be 1" thick. The shutters would have the benefit of also blocking light and would be cheaper.
est cost: $1900

Can you offer any input on this? Have you had any experience with solid panel wooden shutters and their sound blocking?


Randy S

  • Guest
Re: Sound proofing (dampenning) window - Internal Sutters vs laminated storm
« Reply #1 on: November 04, 2014, 05:30:53 PM »

The answer to your question is

Mass / air gap / mass

The more the mass and the greater the air gap the more the reduction.

1/4" laminate glass / 1" air gap / 1/4" laminate glass = STC 37
same glass / 2" air gap / same glass = STC 43
same glass / 3" air gap / same glass = STC 49

Consider what you see on a commercial airplane, 3/8" safety glass / 2" air gap / 3/8" safety glass
That engine is 155 db @ 5' and your at the window wing seat.

Here is a system we do.

Randy S.


  • Guest
Re: Sound proofing (dampenning) window - Internal Sutters vs laminated storm
« Reply #2 on: November 04, 2014, 10:22:34 PM »

yes I understand the concepts of soundproofing.

I was looking for more specific information based on my situation for  wood vs glass soundproofing.

I have used a similar setup to magnaseal and its not ideal.. not only that its not something you can keep on and legitimately offer it as a selling feature.. it does not meet code for bedrooms.. Better to invest in something more functional... so that's what I am researching now.

Randy S

  • Guest
Re: Sound proofing (dampenning) window - Internal Sutters vs laminated storm
« Reply #3 on: November 04, 2014, 10:35:53 PM »

Well to answer your question,I have experience with this and from my field assessment glass would be better in this case because when the shutters are screwed into the window box the shutter will  become the speaker and street noise will be heard considering that the speed of sound through wood is 13,000 fps
I have also used some of our 1" foam mat to line the inside of the shutter like an operable window plug and I have seen better results with a 3" air gap with laminate glass or acrylic.

In my opinion the best solution is to install double operable window with in the same window box with the greatest air gap.

Let me know what you end up doing and how it worked, I am sure other readers would be interested to know.

Randy S.