John Sayers' Recording Studio Design Forum Archive

I cannot find celotex and someone told me medium density rockwool cloth wrapped can work as celotex. But this rockwool is not totally straigh. When I put the upper piece, it bends.

What can I do??

What is the distance between your inner and outer frame, and is it steel or wood? Steve

From pane to pane there will be about 180 mm ( 7 inches ). Wood frame.

OK, but what I need to know is the distance you are spanning with the fiberglass or rockwool - this would be the space from the inside of the outer frame to the outside of the inner frame.

the thickness of the frame where I can attach the isolation is about 60 - 70 mm each frame. And the space between frames is about 40-50 mm. The problem is in the top isolation. The lower piece has no problem. The top and side pieces is the problem.

I'm drawing a picture becouse I think my window frame is a bit special.

What is the way? I'm talking about the A way. A isolation is 180 (7")mm and B is 50 (2") mm (it's so enought?)

Do "A" and "B" represent the top and bottom of your window frame? Perhaps on the top piece, you could stuff some rock wool (or whatever you are using) into the gap and then use cloth lined poster board (the kind with paper on both sides and an 1/8" layer of styrofoam in the middle. Attach this to only one side of the frame. This should be light enough not to sag.

len

A and B represent two diferent ways to fit the rockwool, but what is the best?

please, anyone can help me? Next week a the glazier comes to mount the glass and I have no time to isolate the space between two panes.

thanks.

I don't think there is a "better" way. Both would work. I'd personally choose A. Attach ONE SIDE ONLY to the window frame on one side. The other side should not have any hard coupling. If you use something stiff enough, it should hold up just fine. Even if it hangs down just a little on the unsupported side, the framing to hold the glass pane in should hide it.

Also, you don't show any insulation in the space between the windows. You should line this with some sort of insulation before you put in your covers.

len

Even if it hangs down just a little on the unsupported side, the framing to hold the glass pane in should hide it.

Also, you don't show any insulation in the space between the windows. You should line this with some sort of insulation before you put in your covers.

In accordance with it, the B is the way to do. The A is not posible to hide the isulation down the frame. In "B" there is only about 2" from frame to frame, is so enought?

I try to attach some pictures tonight.

How about this way?