[sbkim]

Great question. Is there significant difference in sound attenuation between R13 and R30 for ceilings? Based n my cursory research, I think some insulation is better than none but can't seem to find anything that thicker insulation is that much better. Thanks

 

[sbkim]

At R13, most of the sound is coming via the framing after that.

Sorry but not sure what you mean... R19 is another reasonably priced option if that's better?

 

[sbkim]

The vibrations that are be transmitted via the framing are the more responsible contributors for sound after the hollow cavity is insulated with either Roxul or fiberglass.

This is why staggered wall assemblies give better STC ratings.

Got it thanks. Do you think R-11 is adequate for this purpose?