Insulations with rock wool is good and effective both for heat proofing And acoustics. By using rock wool we can stop the heat from the roofs from 45° to normal room temperature 27° and also by using rock wool for insulation inside false ceiling, we will give u perfect sound stopping as well as sound absorption .
Mostly used rock wool spec for insulation is 48kg x 50mm and for sound acoustics as per the requirements of the project we will get noise reduction coefficient from .5 to .9 depending upon the density and thickness