Originally Posted by sukumar
I also read about it. GFR (how easy bass enters) is good for pink vs oc 703. However, people said if you have more space go for pink stuff. I wonder if I have space for 17x17x24 or 24x24x34, still pink stuff R13 useful or not. I am assuming that this is available from any Home depot.
34" faced minimum for low GFR material.
porous insulation is a velocity-based
absorber; thus, the insulation needs to be placed (spaced away from rigid boundary) into areas of high particle velocity to be most effective. as you build thicker and thicker porous-only LF absorbers (to space the insulation further from the boundary into areas of higher particle velocity for the longer (lower) wavelengths), you'll want to use a material with lower
flow-resistivity. if doing this approach, take care that the fluffy insulation is NOT compressed and LOOSELY filled. if stacking vertical chunks in the corner, utilize horizontal supports every few ft to minimize compression of the lower layers. or, more ideally, hang strips of pink fluffy from the ceiling down (using gravity to your advantage),- with wider and wider strips as the layers increase and protrude out/away from the corner (creating a corner chunk of vertically 'hung' strips of insulation).