Recycled newspaper cellulose meets American Society for Testing and Materials (ASTM) ASTM-E-119 insulation standards for fire safety ratings.
Cellulose uses a Boric acid fire retardant, a natural product similar to common salt, which is also a natural fungicide. This has the added value of making your structure highly resistant to fungus and mold growth. This fire retardant has no toxic chemicals, off-gassing or other
The National Research Council Canada (NRCC) has performed, and proven, in 48 small-scale tests, that walls built with fiberglass insulation burn more quickly than walls insulated with shredded newspaper.