Rockwool Density For Sound Insulation

This semi rigid batt has a unique flexible edge designed to compress as the batt is inserted into walls attics ceilings and floor frames.

Rockwool density for sound insulation. Fire soundproof insulation. Due to a greater density and weight rockwool does a slightly better job in blocking sound. It is especially useful when superior fire resistance and acoustical performance are required. Roxul rockboard 80 mineral wool insulation panels are 2 x4 sheets that are 2 thick.

Installation of the material and its quality contribute to the quality of soundproofing but the density of rockwool helps reduce sound transmission of 10 decibels through a. The insulation provides excellent acoustic thermal and fire performance and can be ordered to meet specialist requirements in bespoke thicknesses and densities. They have a density of 8 lb ft and an nrc of 0 9 so are great for soundproofing mid to upper range frequency is excellent nrc 0 9 or better and a respectable low range coefficient make the roxul acoustic panels a top choice to absorb or reduce sound. Rockwool cavityrock semi rigid stone wool insulation board available in mono and dual density is designed for exterior cavity wall and rainscreen applications.

Choose mono density insulation in thicknesses up to 2 or dual density in thicknesses of 2 5 to 6. Rockwool comfortboard 80 is a rigid mineral wool insulation sheathing board that is non combustible water repellent fire resistant and sound absorbent. They are both effective in reducing sound pollution and noise. Roxul safe is a lightweight semi rigid stone wool insulation that provides superior fire resistance and sound control.

The actual answer to your question is that thickness is better than density for rockwool mineral wool. Rockwool sound insulation slab is made from mineral wool insulation with a non directional fibre orientation and high density meaning sound waves are trapped and vibrations dampened. Roxul safe is ul and intertek approved as a forming material for numerous firestop systems. Rockwool safe n sound is a stone wool insulation product for use in interior wall partitions floors and ceilings of residential wood and steel stud construction.

The last page in my second link shows the differences in sound absorption at different frequencies based on thickness and density. The acoustic slab also repels water and is vapour permeable resisting rot and mold.