Definition. For the model dwelling, cellulose is the best cavity-wall insulation: the lowest emissions of the cavity materials at 1.8 kg CO₂-eq/m² and the best building-performance score (€0.005/m² per year).
Cellulose needs 80 mm for the required insulation value while the cavity is 70 mm, but over the long term cellulose is still better on CO₂; stone wool is cheaper but scores worst. New Economy’s circular insulation study for Amsterdam reports this.
- Cellulose is the best cavity-wall insulation for sustainability and cost