John Sayers' Recording Studio Design Forum Archive

My new live room has a large window that looks out on to the street. (this is a just a one story building).

The window does not open. Its about 79"high and 108" width with a vertical wood divider down the middle. Its s single pane window that sits in a frame that is about 2-1/2inch deep.

I want to permanantly close this up for both security and more importanty cut down street noise. I have been thinking of putting up a piece of board or something over the window and filling in the frame with insulation and closing off the wall there with dry wall. Does this seem to make sense? If so, should I be looking at something like Owens Corning 703/705 or a looser insulation.

Thanks Ronan

For inside a wall, 2.5 to 3 PCF insulation is considered optimum - 703 is right there, or you could use the same density Rockwool.

2-1/2" isn't a lot of air space between leaves, so you'd want as heavy an inner board as you could get. If it's allowed, you'd be better off completely removing the window and framing a wall... Steve