What makes glasswool insulation effective at trapping heat?

Glasswool is the most common insulation used in homes and commercial buildings worldwide. Examples of glasswool insulation products include Bradford Black batts, Bradford Gold Batts, Optimo underfloor batts and Soundscreen acoustic insulation batts as well as Fletchers Pink Batts and Knauf Earthwool.

Glasswool is primarily made from recycled glass. The glass is melted in a furnace then sent to a spinner to create fibres. The glasswool fibres create millions of tiny air pockets which trap the air. The air pockets make glasswool a poor conductor of heat, an important requirement of effective insulation batts.

How glasswool insulation works

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