Rockwool

What it is

Rockwool, also called stone wool or mineral wool, is made by melting volcanic rock and spinning it into fibre. Pressed into slabs and rolls, it fills the cavity inside partitions, ceilings and duct linings, where it soaks up sound and slows the passage of heat. It does not burn, which is why it is the usual choice wherever a fire rating matters.

Where it goes

• Cavity infill behind fabric panels and wooden slats in auditoriums
• Acoustic partitions between studios, cabins and screens
• Thermal insulation for roofs, ducts and pipes

Typical specifications

Form

Slabs (commonly 1200 × 600 mm) and rolls

Density

48 to 150 kg/m³

Thickness

25 to 100 mm

Facing

Plain, aluminium foil or wire mesh

Fire

Non-combustible

Typical ranges for this material. Ask for the exact brand, grade and size in stock when you ask for a rate.