I'm constructing a room in the crawl space of my house, that will be used in
part for a home theather, and I want to make it as soundproof as possible.
This room will have one 5040 window. Home Depot tells me that they can
supply windows that have 3/16" or 1/4" thick panes, as opposed to the normal
1/8". I'm wondering if any one has experience or information as to the
soundproofing effectivesness of these thicker windows?
One alternative I have considered is to frame the window opening using 2x4's
in the 2x6 wall and installing a regular 1/8 pane window as normal. Then
installing a second window on the inside of the 2x4 opening. this would
leave an approx 2" airspace between the two windows, which could present a
cleaning problem with the inevitable collection of dust in this space, (the
windows are going to be sliders), and it might look a little weird. If the
thicker panes are substantially effective, I think I'd would rather go that
route because of the normal appearance.
I'd apprecite any comments on the thicker pane windows or the double window
arrangement, and any other suggestions as to how to make this window as
soundprrof as possible.
Your best bet along these lines would be to get a double pane unit
with the two panes of unequal thickness, say one 1/8" and one 1/4".
That way the sound has to go through three different layers (each pane
and the air gap in between), each of which will have a different
resonant frequency, so hopefully all the frequencies will get damped
sufficiently. After everything is built, you can always add a third
pane as an interior storm window--again pick a different thickness.
This site says thicker glass is better...
Quote: 1. The transmission loss is increased by 6decibels (db) each time
the frequency of a measurement or the mass per unit of a single layer
partition is doubled. End quote
So it would appear going from 1/8" to 1/4" should reduce noise by 6db.
Some years ago they built a motorway next to the house I was living in. I
was told at the time that a 6 inch air gap beween two sheets of glass was
optimum for noise reduction rather than smaller air gap used for thermal
I built 2 radio stations. Stopping sound through the
glass is simple. Nothing fancy like different
thicknesses and all that stuff. Any glass will work.
Just use 2 panes and space them uneven as in maybe 1
inch apart on the top and 3 inches on the bottom. The
sound will lose itself in there bouncing around. You
still need to double stud the walls etc though. I know
What was the frame material?
1 X door jamb material. Sound through there is
The walls, we used 2 X 3 KD studs 16" oc but in 2
separate walls with the studs on the facing wall in the
center of the other studs. We did use a 2 X 6 plate
deciding that sound was negligible too. We did
insulate both 16" stud widths.
What sort of advice is that, Glenn? Simple and effective...? You're
ruining our reputation! ;)
To the OP: Sound transmission follows different routes. To keep
sound in use absorptive materials (think eggcrate foam on the walls of
a studio), mass (dense wall materials) and construction intended to
prevent structure borne sound (resilient channel and staggered
studs). It's unclear whether your window concern is to keep inside
noise in or outside noise out. Since your question is just about the
window, you could apply a solar film to the inside pane of glass which
would change its resonant frequencies, _slightly_ increase its mass,
and make the surface a bit softer and therefore more absorptive.
Glenn's method is good, but it sounds like you're intending to use a
factory made window for a reason (looks?, ventilation when the theater
isn't in use?), you'd have to use two windows (four panes of glass and
three air spaces). If it's a picture window for light and view you
could build the window yourself incline one pane of glass and seal the
unit to prevent dust. Depending on your location and climate
conditions it might be better to have an insulated unit made for the
interior, incline it a bit, and add a thicker pane of glass on the
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