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 Gold insulation, Optimo underfloor insulation and Acoustic Gold insulation 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 segments.

How glasswool insulation works

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