Posted: Fri Aug 27, 2004 7:58 pm
What original plans? All I see is a basic line drawing with little detail anywhere.
Pretend you're a sound that's trying to escape each area of your plan - you (the sound, that is) should have to make your way through a couple of layers of mass (known collectively as a LEAF) of some kind (like two layers of drywall), then a fairly wide air space with insulation in it, then a second leaf preferable of at least two layers of mass, and THAT'S IT!! Anything more is going to cost you more and give you less isolation.
If you "frame up" a concrete wall and add wallboard, odds are you've already reached the 2-leaf limit for effective sound isolation - if you then add another wall, you will weaken the isolation you have, especially at lower frequencies.
If this isn't clear, you should STOP the framing til you understand the rules of physics and have us look at a wall detail - otherwise, you'll be pretty unhappy with the results... Steve
Pretend you're a sound that's trying to escape each area of your plan - you (the sound, that is) should have to make your way through a couple of layers of mass (known collectively as a LEAF) of some kind (like two layers of drywall), then a fairly wide air space with insulation in it, then a second leaf preferable of at least two layers of mass, and THAT'S IT!! Anything more is going to cost you more and give you less isolation.
If you "frame up" a concrete wall and add wallboard, odds are you've already reached the 2-leaf limit for effective sound isolation - if you then add another wall, you will weaken the isolation you have, especially at lower frequencies.
If this isn't clear, you should STOP the framing til you understand the rules of physics and have us look at a wall detail - otherwise, you'll be pretty unhappy with the results... Steve