Spruce panels treated by spraying with Burnblock® spray, were tested using “Small flame test method” according to EN ISO 11925-2:2011. The fire retardant product from Burnblock ApS is reported by the Danish company to be bioderived and non-toxic. The results for the untreated planed spruce showed moderate flammability whereas the Burn Block treated panels exhibited exceptional fire resistance and only slight discoloration. These results confirm that planing reduces flammability but is insufficient for full protection Combining mechanical processing (planing) with BurnBlock spray, significantly enhances fire resistance by slowing thermal degradation and preventing flame penetration.

Download document (231 kb)
free for the members of IRG. Available if purchased.

Purchase this document