Fiberglass offers an r value of 2 2 to 2 7 per inch while rock wool has an r value of 3 0 to 3 3 per inch making it a slightly better insulator than fiberglass according to the u s.
Rockwool sound insulation r value.
Rockwool comfortbatt is a stone wool insulation product for improved sound absorption and fire protection in residential wood and steel construction.
Rockwool safe n sound is a stone wool insulation product that can reduce noise and sound absorption in residential wood and steel stud construction.
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.
It is especially useful when superior fire resistance and acoustical performance are required.
However the total effective r value of an assembly is the total nominal r value minus reductions caused by thermal bridging at the studs girts fasteners ties and other attachment methods.
Visit the rockwool r value calculator contact rockwool building science for assistance with your calculations.