Mineral stone wool insulation batts are slightly better insulators than the off-the-shelf fiberglass batts sold at most ...

Mineral wool and glass wool are fiber materials made from slag, rock, glass, and minerals that have been melted and spun into filaments. The fibers that comprise mineral wool, rock wool, slag wool, ...

The resultant fibers are then collected as an entangled mat of fibrous product. Rock wool is often fibrous and derived from a calcium silicate mineral. Slag Wool Slag wool is manufactured by the ...

Area \(\percent\) heat loss Method How it works Roof 25 Insulate loft with mineral wool or fibre glass. Trapped air between glass or mineral wool fibres reduces heat loss by conduction and convection.