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Author Topic: Milgard Quiet Line windows vs other options  (Read 13190 times)

letsgobobby

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Milgard Quiet Line windows vs other options
« on: December 21, 2011, 09:44:58 PM »

I have posted in another forum but for now this is about our windows.

Randy S kindly suggested a lot of fixes including the magnetaseal homemade option to reduce sound transmission through the windows. However the quote on the plexiglass we are getting is about $250, plus the framing and tape and work and I think I'll be in the high $200s for this solution - for one window (the window is about 60 x 70 inches).

So we had a Milgard auth'd installer come out. She made 2 different suggestion.
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letsgobobby

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Re: Milgard Quiet Line windows vs other options
« Reply #1 on: December 21, 2011, 09:47:04 PM »

Option 1: replace current window glass with 2 newer, thicker pieces of glass, one of them laminated. STC on this would be 34-35. Our current windows are Milgard Style Line, STC 28. So this would reduce sound by about half, if I understand STC correctly.

Option 2: replace with Quiet Line. STC would be 45. However she said there is only 1.5 inches of airspace between the panes here - I thought the goal was 4-6 inches or more to deaden sound.

Any thoughts or comments? We are willing to do it right as we plan to live here for a long time.
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letsgobobby

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Re: Milgard Quiet Line windows vs other options
« Reply #2 on: December 21, 2011, 09:50:13 PM »

one other concern about the homemade magnet seal option - we were told 1/4 inch plexi weighs 1 pound per sf, and this window would need a 35 sq ft covering - 35 pounds. Will the steel frame and magnetic tape securely hold a 35 pound covering?
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Randy S

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Re: Milgard Quiet Line windows vs other options
« Reply #3 on: December 22, 2011, 12:40:29 AM »

The magna seal framing and magnetic tape is only to create the seal..the weight of the acrylic will rest on the window sill, for an inset installation. If you are doing flush mount you would have to add a board or screws for which the acrylic would rest.

We promote MILGARD windows due to the results of their product and the quality of the install.

When it comes to achieving high STC there are a few factors involved here;
1) the air gap...example : 1/4" laminate/ 1" airspace 1/4" laminate = STC 37
                                         same glass with 2" air gap = STC 43   same glass with 3" air gap STC 49
2) in homes you will still share the same window box from source to receiver so this would dictate diminishing point of return or max value...
When we do recording studios the reason we can achieve higher values is because each pane has a separate window box built into 2 separate walls that are decoupled so no direct path for sound to take through the sill/ window box.
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Randy Sieg

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Ph. 760-752-3030
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Randy S

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Re: Milgard Quiet Line windows vs other options
« Reply #4 on: December 22, 2011, 12:43:03 AM »

The the best system would be to install 2 milgard windows back to back with the greatest air space possible... however in my experience this is over kill for the reduction achieved or I should say past diminishing point of return if the walls are not addressed as well.
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Randy Sieg

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

letsgobobby

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Re: Milgard Quiet Line windows vs other options
« Reply #5 on: December 28, 2011, 09:08:15 PM »

Hi Randy - windows people quoted us $13,000+ for 6 good-sized windows. They also said they could not put the windows in with the ones we already have. We need to think of another option. We are looking at the soundproof window idea again, since it seems it will create the largest air space.

Also I am sure we need to do our walls. I used a smartphone ap decibel meter and get 40 dB when the room is quiet to 75 when a truck passes. And that wasn't the loudest truck. I can hear the truck as it passes our house, moving left to right, through the walls (there are no windows on those two walls facing the road). Discouraging, but probably the facts.
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Randy S

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Re: Milgard Quiet Line windows vs other options
« Reply #6 on: December 28, 2011, 09:17:07 PM »

That doesn't surprise me, residential window treatment is very limited and therefore you have to work with what you have...This is why our DIY magnaseal system is the preferred system...

The 40db-50db are good readings, I know it is still audible but the reductions for the 75db will be the best cost vs. reduction value...under 40db will end up doubling the cost for every additional 3db-5db loss...

The way it works is you address the windows to max reduction then you match the wall STC to the window value...



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Randy Sieg

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

Randy S

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Re: Milgard Quiet Line windows vs other options
« Reply #7 on: December 28, 2011, 09:19:19 PM »

Also your readings are the remittance of surface area...not just 1 wall....this is why we promote a methodical approach to address noise reduction issues.
"Your sound control bubble is only as good as its weakest point"
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Randy Sieg

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

letsgobobby

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Re: Milgard Quiet Line windows vs other options
« Reply #8 on: December 29, 2011, 02:09:13 AM »

thank you Randy. Your posts give me so much hope! I know we will get things better. This house is beauty outside of this one issue, and we love the neighborhood, school district, proximity to the city and work - everything. So we fix this and live there 20 years and we'll be happy. Thanks again.
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mrmax1984

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Re: Milgard Quiet Line windows vs other options
« Reply #9 on: January 19, 2015, 09:31:03 PM »

That doesn't surprise me, residential window treatment is very limited and therefore you have to work with what you have...This is why our DIY magnaseal system is the preferred system...

The 40db-50db are good readings, I know it is still audible but the reductions for the 75db will be the best cost vs. reduction value...under 40db will end up doubling the cost for every additional 3db-5db loss...

The way it works is you address the windows to max reduction then you match the wall STC to the window value...

Hi there. I just found this thread and your particular post on this subject. I too got quotes from the soundproof window folks in the thousands of dollars, so this DIY method seems fantastic. What type of acrylic/plastic material do you recommend for the the interior window? Also, what are the minimum and recommended thicknesses?

Thanks!
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Randy S

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Re: Milgard Quiet Line windows vs other options
« Reply #10 on: January 19, 2015, 10:53:51 PM »

Mass / Gap / Mass is the formula.

The heavier the panes of glass or acrylic and the deeper the gap between the 2 panes the better the reduction.

Think back to riding on a commercial airplane ...3/8" safety glass 2" gap 3/8" safety glass and that engine is about 155 db at 5' during take off...pretty quiet ...

This is what you are trying to match as best you can...we have found that 3/8" acrylic is the diminishing point of return as you go thicker the values of reduction are questionable based on increased cost of the acrylic pane.

Randy S.
760-752-3030 ext 3095
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Randy Sieg

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