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Overview | Ash | Hard Maple | Red Oak | White Oak | Tulipwood American White Oak (Quercus Spp)Natural Durability To Wood-Destroying FungiEN 350-2 : 1994 The following classification provides an indication of the currently accepted characteristics and performance of wood in ground contact. Heartwood - class 2 durable/class 3 Moderately durable EN 942 : 1996 Natural durability sufficient for exterior joinery. American white oak is therefore suitable for exterior use without preservative pre-treatment EN 335-2 : 1992 Cross reference to ascertain the relevant hazard class. Moisture MovementEN 942 : 1996 Classed as medium. TreatabilityEN 350-2 : 1994 The following classification refers to a set of broad descriptions for classifying treatability based upon general observations associated with the use of penetrating treatment processes. Heartwood - class 4 Extremely difficult to treat GeneralSee comments for red oak
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