The modified wood It is a term used to describe solid wood that has gone through a physical or chemical process (not a biocidal product) to improve its durability (resistance to decay and insect attack) or to provide specific performance characteristics such as dimensional stability.
Modification processes change the original species such as pine or FIR in a higher value of commodity, creating a new species with different performance properties. As such, modified forests are not easily compared with naturally durable or wood preservative treated because performance testing cannot be carried out in the same way.