I am looking to plug a window that is 47x94 inches. The main goal will be to keep studio noise from going outside. The window "glass" is actually really cheap thin vinyl windows that are set back in the cavity about 4 inches from the interior wall.
I want to plug the window in a way that will stay in place for several years.
I was considering framing in some "MDF-couple inches of 703-MDF". Leaving the cheapo vinyl windows on the exterior. But I have been wondering if that cheap thin vinyl window on the exterior might function as a 3rd leaf and actually work against me. Would I be better off having MDF-703-vinyl window?
Any thoughts? Thanks
window plug: avoiding a third leaf
Originally posted at johnlsayers.com, topic 10555.
What is a vinyl window?
Did you mean plexiglass (acrylat or polycarbonat?).
If so how thick?
With vinyl window I picture some foil in my mind.
it's rolly a window made out of old records :twisted: :P
Yes, Plexiglass, Probably 1/8 inch. Very thin.What is a vinyl window? Did you mean plexiglass (acrylat or polycarbonat?). If so how thick?
Yes that's a triple leaf.
1) replace that window pane by glass, laminated is better.
2) I can't imagine the construction. Can that window be shifted in that opening?
3) set a panel on the inside (1 single panel, with an as large as possible cavity) and if you use something as mdf fill the cavity with absorption material.
The while thing will work as a traditional double leaf system. The larger the cavity the better, the heavier the masses the better.
With the small cavity you have you should replace that plexy pane by heavier thicker glass.
A double leaf system with 1 side much lighter than the other side is less good than having masses closer to another in function of weight.
Hence compensating that plexyglass by increasing that inner panel more and more is not an efficient way to go since the MSM will become mainly dominated by the plexyglass.