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Author Topic: replacement windows vs soundproof windows  (Read 5443 times)

mcjohn

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replacement windows vs soundproof windows
« on: April 16, 2016, 02:33:11 AM »

I've been looking into either interior or exterior sound reducing windows to add on top of my existing windows and just replacing  my existing windows with sound reducing windows.  My existing windows are 1980's Pella's with a single pane on the exterior of the frame and another removable single pane on the interior of the frame.  There is a little mini blind in-between the two hence the removable interior glass.  It looks super cool but I'm guessing the STC rating is pretty crappy, basically it's a single pane with an interior storm window.  There are 3 of them side by side in my bedroom, measuring 36" by 72" each.  So roughly 9' of wall space 72" tall of windows.

I talked to Soundproof Windows and have been quoted a little over 3 grand shipped to my door for 3 of their storm window type soundproof windows to install on top of my existing windows.  I do believe they will work really well but I'll have to install them myself and honestly I won't be crazy about the look, but if I can get a good nights sleep I'll deal with it.

I've also got a quote from a local Marvin windows dealer.  They will replace all 3 windows with very high quality wood frame with aluminum cladding (this will match all of my other windows really well, that's how they are made too) and double pane laminated glass with an STC rating of 40.  The total cost installed is 5100 bucks.

Since the cost is not as far apart as I thought it would be I'm wondering if the Marvin windows are a better choice in the long run. I'm sure they will look much nicer and I'll have brand new window frames and glass. 

Is it safe to assume the noise reduction between the two solutions will be very comparable, possibly even so close it would be hard to discern the difference?

Thanks for any opinions.

mcjohn

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Re: replacement windows vs soundproof windows
« Reply #1 on: April 16, 2016, 04:13:41 AM »

Okay I'm starting to rethink this magnetite solution as well.  It's a thousand bucks plus shipping for a magnetically attached insert that goes inside my windows and is supposed to acheive an stc rating of 48 when combined with a dual pane window.  This seems to be a better noise reduction solution and would be 4 grand cheaper than replacement windows and 2 grand cheaper than soundproof storm windows.  Do these actually work?

Thanks!

Randy S

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Re: replacement windows vs soundproof windows
« Reply #2 on: April 16, 2016, 03:34:54 PM »

Mcjohn,

Mass / gap / mass dictates the potential reduction.

did you price out 3/8" acrylic?  and what is the max depth of the air gap you can achieve?

Randy S.
Randy Sieg

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mcjohn

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Re: replacement windows vs soundproof windows
« Reply #3 on: April 16, 2016, 05:09:15 PM »

The windows are double hung, with the upper section maybe 3/4's of the total height.  If I installed the acrylic over both the upper and lower sections of each individual window I would have a really nice maybe 3" gap between the interior of the existing window on the upper section, but only a half inch or so on the lower section.

I had a couple of other thoughts as well.  One would be to install an insert for the upper section on the inside of the window frame and an insert for the lower section on the outside of the window frame.  This would give me a two to three inch gap on both upper and lower sections.

The other thought I had was just replacing the removable interior glass with some thick acrylic.  I took a picture of how the interior glass section is removable.  Using this approach I would have just the exterior glass that came on the window, a 1 inch gap, then the acrylic.  If this would provide decent sound reduction it would be the cleanest install and leave the windows looking very much like the do now.

Randy S

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Re: replacement windows vs soundproof windows
« Reply #4 on: April 16, 2016, 05:19:52 PM »

take another pic.
raise the blinds on the picture of the removable glass and let me get a look at the assembly...

Randy Sieg

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

mcjohn

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Re: replacement windows vs soundproof windows
« Reply #5 on: April 16, 2016, 06:12:25 PM »

Here are three pics of the lower sash with the blind removed.  One has a measuring tape so you can see the depth, one is the window lock that I believe will get in the way if I try to replace my removable glass with 3/8" acrylic, one is a little further out so you can see the framing from a distance.

mcjohn

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Re: replacement windows vs soundproof windows
« Reply #6 on: April 16, 2016, 06:58:57 PM »

This is the exterior lower sash.  I was thinking 3/8" acrylic inserted under the upper sash frame, wedged into the sliders (they push in and have a spring loaded feel to them) then sealed on the bottom and top with weather stripping.  This would give me a larger air gap for the lower sash than mounting one piece of acrylic over both upper and lower sash from the inside. 

I could then mount 3/8" acrylic on the inside of the upper sash in the same manner.

Randy S

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Re: replacement windows vs soundproof windows
« Reply #7 on: April 18, 2016, 03:47:33 PM »

3/8" laminate glass will work far better then acrylic, so do not do that...

based on the pictures you have provided, doing any secondary window treatment will not deliver full value because you do not have enough depth on the lower section to achieve the desired air space.

If you choose to go forward with the project I can only anticipate an additional 15% reduction (2-3 db loss) at best due to the lower section air gap.

The marvin replacements might be the way to go, especially when the value of reduction is questionable.

I can agree this is a tough decision to make.

can you go to the marvin dealer and see the windows in action?

Randy S.
 
Randy Sieg

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

mcjohn

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Re: replacement windows vs soundproof windows
« Reply #8 on: April 18, 2016, 06:19:21 PM »

I was looking at your magnetic seal insert solution and was thinking I could build one magnetic seal insert for the upper sash to mount on the inside and one for the lower sash to mount on the outside.  If I'm reading the magnetic seal info correctly you're recommending 3/8" acrylic for this.  The window is full exposure to the Georgia sun, would heat build up be too extreme?

They don't have the Marvin windows with high STC glass in their showroom but they do have the wood frame/aluminum clad windows which appear to be exceptionally well built.

I hate the thought of spending 5k on Marvin windows, though the probably would work fairly well.  The STC rating is supposed to be 40.  Honestly I may just sell the house and move before spending that kind of money on windows.....ugh