Definition. Glass wool as cavity insulation emits 4.4 kg CO₂-eq/m². In the study it has an Environmental Cost Indicator of €0.84/m² and a building performance of €0.011/m² per year, at €7/m² and roughly 10% real reuse, making it a mid-range cavity option.
Cellulose scores better on CO₂ and environmental performance in the same cavity. New Economy’s circular insulation study for Amsterdam reports this.
- Glass wool as cavity insulation: 4.4 kg CO₂ per m² and 10% reuse