Stone wool insulation does not have a STC (Sound Transmission Class) rating, but the use of stone wool insulation within a partition assembly can increase the STC rating by up to 10 points. An STC rating indicates the reduction of sound transmission through a partition assembly, not each individual element.
STC (Sound Transmission Class) value is a single number rating to specify the reduction in sound levels that the partition provides. The sound transmission loss performance of a partition is measured using ASTM E 90 "Standard Test Method for Laboratory Measurement of Airborne Sound Transmission Loss of Building Partitions and Elements" and calculated according to ASTM E 413 "Classification for Rating Sound Insulation." As a general rule, the higher the STC rating, the better the partition's acoustical performance.
Superficial and temporary irritation of the skin after handling stone wool is mechanical and not chemical. It causes no allergies and disappears once rinsed with water.
Heat insulation performance of thermal insulation is expressed by thermal resistance and thermal resistance is calculated by dividing "thickness of insulation material" by "thermal conductivity of insulation material".
Thermal resistance (R-value) (㎡ · K / W) = thickness (m) / thermal conductivity (W / m · K)
Glass wool is a high-tech product, mainly made from sand and recycled glass, and stone wool is made from volcanic rock - a natural material present in large quantities throughout the earth. but both are called mineral wool. The production method for the two types is not quite the same as you can also see a difference in the fiber structure of the products.
You can reduce the lambda value (increase insulation ability) slightly by compression and higher density up to some extent. But at the same time you reduce the thickness and it is more important than the lambda value. One should therefore strive to have custom thicknesses.
Thermal transmittance :The thermal coefficient, denoted by U, is the characteristic of how well an entire building component isolates, such as a wall. The thermal conversion coefficient is also called U value and the unit is W / m² · K. The lower the value the better the insulation.
Heat conductivity is the property that indicates how well a material insulates. It is denoted by the Greek letter lambda λ and the unit is W / m · K. Lambda value is independent of the thickness of the material. The lower the lambda value, the better the insulation material.