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Author Topic: Milgard Quietline window without laminated glass  (Read 616 times)

Mike-Del

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Milgard Quietline window without laminated glass
« on: May 09, 2017, 11:28:34 PM »

Hi, I am replacing my bedroom window for sound reduction purpose (mainly accelerating cars and trucks). Currently window is fairly large, it's 96" x 36" double slider. Options I'm considering are:

1. Keep the window size, go with Milgard quietline window, they have these two type I'm considering. A: 3/16+1/8+3/18 non-laminated, which has STC rating of 46 and OITC rating of 36, cost $900 each; and the other type B: 7/32L +1/8 + 7/32L, this one have two laminated glasses, and the STC rating of 47 and OITC rating of 37, cost $1500 each;

since the STC and OITC rating are only 1 point difference, does the type with laminated window justify the 70% higher cost?? would there be any benefit, such as much better low frequency performance that's not captured in the OITC rating??

2. The other option for me is to make the window smaller, to meet the code, I think the smallest I can go is 50" x 42", which is about 40% size reduction from the original window size. This would of course be a much larger project and if I do this, I may go with Milgard Tuscany window with 1 laminated glass, the STC rating is 36 and OITC rating is 29. The overall cost of doing two windows would be around $3500.

I am now using the plexiglass window insert from Supersoundproofing, which is a great method, but I do want to switch to something more operable. I will eventually also do the drywall, but window needs to go first.

Randy S

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Re: Milgard Quietline window without laminated glass
« Reply #1 on: May 10, 2017, 04:15:31 PM »

Mike-Del,

We do promote Milgards quiet line windows because they do perform quite well, I agree the cost increase over a couple points is hard to justify, I think you are referring to the 7120 HS series (just a guess) however remember you are dealing with traffic noise which is why the OITC test is better which testing starts at 80hz and STC testing starts at 125hz...
I know its a tough decision but when soundproofing you are trying to get the most points in the lower frequency range for better overall performance.
I think your option B has an OITC of 38 if not mistaken so it would be 2 point spread between the two options.
I myself would have a tough time making this decision as well.  I surely would not go with the tuscany series unless its their sliding glass door if you had a choice.

What is the distance from the road to your house? are you level with road or elevated?
This might be the determining factor!! if you have good distance for decay and not elevated then the $900 is the winner, but if your real close and elevated go big or you might end up still having our insert if your not happy.

I am happy to hear you tried our Magnaseal system and it worked well for you.

call me direct if you would like to discuss.

Randy S.
760-752-3030


 
Randy Sieg

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

Mike-Del

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Re: Milgard Quietline window without laminated glass
« Reply #2 on: May 10, 2017, 06:27:54 PM »

Thanks, Randy.

My window is about 35fts away from the road, and my bedroom is indeed elevated by about 4ft. from the road (my whole front yard is elevated actually, dont know if that helps?). And you are right, the OITC point difference is 2.

My reasoning for using the Tuscany with laminated glass is that I would be able to make the window about 40% smaller, with almost the same cost. Would this help with the sound transmission??

BTW, when I used the magnaseal system, I can feel that the sound is transmitting through the dry wall, would that mean I won't get much help even if going with the best window possible. (I do intend to do the double dry wall with green glue in the future).

Guocheng
 

Mike-Del,

We do promote Milgards quiet line windows because they do perform quite well, I agree the cost increase over a couple points is hard to justify, I think you are referring to the 7120 HS series (just a guess) however remember you are dealing with traffic noise which is why the OITC test is better which testing starts at 80hz and STC testing starts at 125hz...
I know its a tough decision but when soundproofing you are trying to get the most points in the lower frequency range for better overall performance.
I think your option B has an OITC of 38 if not mistaken so it would be 2 point spread between the two options.
I myself would have a tough time making this decision as well.  I surely would not go with the tuscany series unless its their sliding glass door if you had a choice.

What is the distance from the road to your house? are you level with road or elevated?
This might be the determining factor!! if you have good distance for decay and not elevated then the $900 is the winner, but if your real close and elevated go big or you might end up still having our insert if your not happy.

I am happy to hear you tried our Magnaseal system and it worked well for you.

call me direct if you would like to discuss.

Randy S.
760-752-3030


 

Randy S

  • Senior Soundproofing Technical Specialist
  • Global Moderator
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  • Posts: 777
    • Super Soundproofing Co
Re: Milgard Quietline window without laminated glass
« Reply #3 on: May 10, 2017, 09:14:44 PM »

Yes the smaller the window the less the transmission...look at windows like speakers.

So you have already made the window system stronger then the wall..good job how much air gap did you achieve between the window and the insert?
Randy Sieg

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

Mike-Del

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Re: Milgard Quietline window without laminated glass
« Reply #4 on: May 10, 2017, 11:04:40 PM »

Hi Randy, I have a air gap of about 3inches in current magneseal setting.

With these information, which option would you recommend? I am leaning toward the non-laminated Quietline window approach since it's seems to be out performing the wall (assuming it would be similar to even better than the magneseal I have now) already and saves me some money, which can be used later to work on the wall. What do you think??

Regarding the idea of shrinking the window, I read from somewhere that shrink the window by 50% would only gain 3STC points, if that's the case, it might not make sense to do so, especially I will need to put dry wall to the area and simple drywall is going to be worse than the quietline window.

Thanks for the help, Randy.


Guocheng

Yes the smaller the window the less the transmission...look at windows like speakers.

So you have already made the window system stronger then the wall..good job how much air gap did you achieve between the window and the insert?

Randy S

  • Senior Soundproofing Technical Specialist
  • Global Moderator
  • *****
  • Posts: 777
    • Super Soundproofing Co
Re: Milgard Quietline window without laminated glass
« Reply #5 on: May 10, 2017, 11:21:29 PM »

Ok, at 3/8" acrylic with 3" air gap you should be pushing 49 STC  so this concerns me.
if you're at 1/4" acrylic and 3" air gap should be around 44 STC

To be honest, this is a fine line...I do not want to steer you wrong....

this doesnt happen very often with soundproofing solutions but you get 10 points for making me question myself in order to make a solid recommendation.

Ok, if you add soundproofing to the walls it would be easy to get up to 50-55 STC so in the end the window will be back to the weak point even though you have achieved excellent noise reduction.

I will lean with you on this and go non laminated quiet line. I hope we are right...just remember a couple points in the low end frequency ranges is actually a big deal.

I hope you return and update this thread on the results, it would be interesting to see.

Randy S.



 
Randy Sieg

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

Mike-Del

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  • Posts: 0
Re: Milgard Quietline window without laminated glass
« Reply #6 on: May 11, 2017, 01:29:42 AM »

Thanks, Randy. I will definitely keep you update on the end results.

Regarding the option to make the window smaller, do you see the need of doing that? If I do still go with the same Quietline non-laminated window. The difference would be the 40% original window area replaced with wall, and my wall is currently single layer drywall and wood siding on the outside. Of course the job would become much bigger if I change the window size, just wondering how much would that help. Sorry for having so many questions, just want to make sure I'm making educated choice. Thanks a lot for your help!!


Ok, at 3/8" acrylic with 3" air gap you should be pushing 49 STC  so this concerns me.
if you're at 1/4" acrylic and 3" air gap should be around 44 STC

To be honest, this is a fine line...I do not want to steer you wrong....

this doesnt happen very often with soundproofing solutions but you get 10 points for making me question myself in order to make a solid recommendation.

Ok, if you add soundproofing to the walls it would be easy to get up to 50-55 STC so in the end the window will be back to the weak point even though you have achieved excellent noise reduction.

I will lean with you on this and go non laminated quiet line. I hope we are right...just remember a couple points in the low end frequency ranges is actually a big deal.

I hope you return and update this thread on the results, it would be interesting to see.

Randy S.

Mike-Del

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  • Posts: 0
Re: Milgard Quietline window without laminated glass
« Reply #7 on: May 17, 2017, 03:35:10 AM »

Hi Randy,

Some update on the project, I have decided to go with the OITC 36 non-laminated option and also to reduce the window size to about 60% (just barely meeting the engress requirement).

However, just talked to a HomeDepot contractor and he said that he wont be able to install Quietline, he did not go into specifics. But I'm wondering if you have experience regarding how much more difficult it is to install Quietline comparing to other window? I know it's heavier, but if the size is about half, I'm not sure why would there be any issue installing the window?? I just want to make sure that I wont be in a situation I spend couple grands on the windows that would cost another fortune to install and only a few specific contractors can do it. Thanks alot for your help as always.


Mike

]
Thanks, Randy. I will definitely keep you update on the end results.

Regarding the option to make the window smaller, do you see the need of doing that? If I do still go with the same Quietline non-laminated window. The difference would be the 40% original window area replaced with wall, and my wall is currently single layer drywall and wood siding on the outside. Of course the job would become much bigger if I change the window size, just wondering how much would that help. Sorry for having so many questions, just want to make sure I'm making educated choice. Thanks a lot for your help!!

Randy S

  • Senior Soundproofing Technical Specialist
  • Global Moderator
  • *****
  • Posts: 777
    • Super Soundproofing Co
Re: Milgard Quietline window without laminated glass
« Reply #8 on: May 17, 2017, 03:20:59 PM »

from what I understand is that Milgard quiet line has to be installed by certified Milgard installers due to the way the window is sealed.
I would call Milgard direct and ask them to refer you to their recommended installers.

Randy S.
Randy Sieg

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