Accessible and circular bio-construction. Transforming the quintessential urban waste (unsold old newspapers) into a high-performance invisible thermal insulation. Cellulose flakes are the ultimate weapon against the cold walls of post-war housing.
Via a ground-floor blowing machine, cellulose is pumped at high pressure through a hose into the air cavities of perimeter walls or sprayed into uninhabitable attics. The airflow guarantees total fill of every crack and gap. The material autonomously engulfs pipes, ties and hidden cables, physically eliminating thermal bridges and blocking destructive convective air movements (wind-washing) inside the masonry.
Unlike synthetic insulators (EPS or polyurethane), high-density blown cellulose (up to 60 kg/m3) has high thermal mass capacity. It works as a thermal flywheel, drastically slowing summer solar heat ingress (over 12-hour phase shift) and keeping the house cool. Being paper, it is treated with boron salts during shredding, making it self-extinguishing (chars slowly), unattractive to rodents and insects, and totally immune to mould.
Standards
European and international references applicable.
Physical properties
Usage environment
SETTLEMENT: blown at high pressure and density (>45 kg/m3), the cellular fibres interlock with each other and the rough brick walls, guaranteeing zero settlement (certified <1%) over the entire building life. ACOUSTIC BONUS: fibrous, soft and highly porous, blown cellulose also acts as a phenomenal acoustic damper, filling resonant voids (drum effect) in drylining partitions and timber floors.