Super Soundproofing Community Forum

Please login or register.

Login with username, password and session length
Advanced search  

News:

Need an answer right now? Go to http://soundproofing.org, or,  FEEDBACK

Or call us toll-free at 888-942-7723 8-5 Pacific time Weekdays. 

  If we're not in, send a email to supersoundproofing@gmail.com

You can get a free report on soundproofing by going  HERE

 MAINSITE

Author Topic: Which Windows to Sound Proof??  (Read 5620 times)

MCF

  • Guest
Which Windows to Sound Proof??
« on: September 08, 2009, 03:03:02 PM »

I am considering soundproofing my master bedroom windows with magnetite windows.  My house is a free standing zero lot line home.  My bedroom is in the front of my home on the 3rd floor facing South.  There is a residential street in front of my home and we sometimes experience some late night traffice and occasionally people parking on the street and coming back to there cars in the early morning hours after drinking at the local bars/clubs.  On the South Wall (facing the street) I have two large windows that are 46.5" wide x 69.5" tall and a balcony door that has a window in it that is 24" wide x 78" tall.  I will obviously have the extra pane of glass installed on these two windows and the window in the door.

On the east wall of my bedroom (90 degrees to street), I have three small windows that are 22.5" wide x 22.75" tall (one near front of house, one in middle of wall, and one further in) and one window that is 35" wide x 69.5" tall (this window is farthest from the front of the house).  These windows face the house next to me that is only ~5-6' away from mine and is the same height as my home.  If my goal is to reduce sound from the street in front of my home, do I have to have these windows 'sound proofed' as well?

Lastly, how much of an improvement is 1/4" magnetite over 1/8" magnetite assuming same air space between existing double pane windows and new magnetite windows?

Randy S

  • Senior Soundproofing Technical Specialist
  • Global Moderator
  • *****
  • Posts: 777
    • Super Soundproofing Co
Re: Which Windows to Sound Proof??
« Reply #1 on: September 08, 2009, 03:49:44 PM »

Yes, you will have to soundproof all windows in this room. 1/4" is 20% better than 1/8" and 3/8" is ideal. Most important is to achieve the 2" air space between panels. Im not sure if you can achieve this with the door, might have to replace it with a solid core door.
Randy Sieg

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

MCF

  • Guest
Re: Which Windows to Sound Proof??
« Reply #2 on: September 08, 2009, 05:22:29 PM »

Thanks.  I believe 1/4" is thickest that http://www.sunandsoundwindows.com/ offers.  Also, I know that the 2" air space is best, but I don't think that magnetite allows for 2" gap, is this correct?

Randy S

  • Senior Soundproofing Technical Specialist
  • Global Moderator
  • *****
  • Posts: 777
    • Super Soundproofing Co
Re: Which Windows to Sound Proof??
« Reply #3 on: September 08, 2009, 06:02:23 PM »

No,Magnatite and magnaseal are installed at any distance you desire. I have followed the link you provided, their claims of reduction are way to high!. In the real world with real results you should achieve 20% reduction with 1/8" thickness, 40% reduction with 1/4" thickness and 50%-60% reduction with 3/8" thickness. And this is all based on having the system 100% sealed and the 2" airspace.
Randy Sieg

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

MCF

  • Guest
Re: Which Windows to Sound Proof??
« Reply #4 on: September 08, 2009, 06:15:52 PM »

Again...thank you.  As I would be pleased with a 'percieved' 40% reduction, how much of a reduction could I expect if the air gap is only 1" vs. 2" - maybe 25-30% reduction?  Again, just trying to eliminate sound of cars driving down street - not constant traffic light night / early morning.  The windows in question are on the 3rd floor and off street about 50-70'.

Randy S

  • Senior Soundproofing Technical Specialist
  • Global Moderator
  • *****
  • Posts: 777
    • Super Soundproofing Co
Re: Which Windows to Sound Proof??
« Reply #5 on: September 08, 2009, 06:30:47 PM »

Yes, 25%-30% should be a fair estimate...the air gap is truely the greatest benefit for noise reduction.
I sound like a broken record. lol
Good Luck!
Randy Sieg

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

MCF

  • Guest
Re: Which Windows to Sound Proof??
« Reply #6 on: September 08, 2009, 06:38:40 PM »

Randy..thanks.  One last question - so what if I get 1/4" panes with ~1.5" to 2" air gap but only get a 3/4" air gap in the window for the balcony door.  Is not getting the door as 'ideal' as the remaining windows going to negate everything else?  I can't see getting more than 3/4" air gap between new pane and existing window in the door.  Thanks!  BTW, the cost is going to be about $1450 installed for everything (3 large windows, 3 small windows, and door).

Randy S

  • Senior Soundproofing Technical Specialist
  • Global Moderator
  • *****
  • Posts: 777
    • Super Soundproofing Co
Re: Which Windows to Sound Proof??
« Reply #7 on: September 08, 2009, 06:57:28 PM »

That is why I made the statement of having to replace the door with a solid core door and address the seals and gap at the bottom.
Sound is going to act like water and go to the area with least resistance. So the door will be the weakest link in the system. Also any type of leaks will be what determines the total value of this project.
Randy Sieg

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

Adrian

  • Guest
Re: Which Windows to Sound Proof??
« Reply #8 on: February 14, 2010, 11:30:45 PM »

Hey,
I think Randy has this one covered for you but I have a few extra comments.

Treat a room as a unit.  Soundproof all windows in a room.  While noise travels in a straight line, meaning the windows facing the noise are most affected, noise can bounce of buildings adjacent to your building and come in side windows. Also the noise is not localized and people will move and traffic will flow so the noise is coming at different angles and can hit your eastern windows aswell.

The other item I would add is that in Australia our ideal gap is 4 inches not 2 inches.  By doubling the air gap you can get as much if not more of an improvement compared to doubling the glazing thickness.  If you can only get 1/4 inch then go for it but leave a bigger gap.  1 inch air gap is not suitable for noise reduction.  The air gap costs you nothing so use as much of it as you can.

Also percieved nosie reduction is tricky as everyone percieves noise differently.  Generally speaking a 10 decible change in noise is equivalent to a percieved 50% change in noise.  If you double the thickness of the glazing you are getting approxiately a 2-3 decible chagne in noise which I would consider to be a 10-15% percieved difference.

Hope this helps.

Regards
Adrian Lafleur
Magnetite (Australia) Pty Ltd
www.magnetite.com.au