Rockwool Slab

Rockwool (Mineral Wool) is commonly used as thermal insulation (as both structural insulation and pipe insulation, though it is not as fire-resistant as kaowool), filtration, soundproofing, and hydroponic growth medium. Though not immune to the effects of a sufficiently hot fire, it is a common building material when passive fire protection is required. In hydroponics, it can be engineered to hold large quantities of water and air that aid root growth and nutrient uptake.