Perdure wood has very good dimensional stability. It has a relative humidity of around 0 % to 1 % at the end of the treatment that stabilizes at around 2.9 % to 3.5 % when left outside. Swelling and shrinkage are low. The coefficients of heat and acoustic insulation remain stable, regardless of the ambient humidity.
Lignin eating microorganisms (mushrooms in particular) need a certain humidity level to develop. Since Perdure wood has poor water retention, it is no longer a preferred medium for microbial action. Tests carried out at Forintek (research institute on wood products in Canada) and at Laboratoire d’Études et de Rercherches sur le Matériau Bois at Université de Nancy I, demonstrated the durability of Perdure wood by its resistance to cubical and fibrous rot attack. While mushrooms degrade untreated wood by 30 % to 70 % on average, they cannot degrade Perdure wood significantly. This wood may then be considered as exterior, non-sheltered and above ground grade.
The static bending strength of Perdure wood was measured by Forintek and revealed that it was not significantly lowered.
The National Testing Laboratory demonstrated that Perdure spruce strip cladding has a fire resistance of one (1) hour like untreated spruce.
Perdure wood can be manufactured and marketed right after thermal treatment, thereby avoiding numerous stocking and management problems.
Perdure wood may be planed like traditional wood and no additional abrasion was detected on the tools. However, given the hardness of the surface, it is sometimes necessary to adjust the cutting speed. A good vacuum system is recommended since the dust is very fine.
Wooden profiles are easy to nail, screw and staple, thereby allowing multiple uses.