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Overview | Ash | Hard Maple | Red Oak | White Oak | Tulipwood American Tulipwood (Liriodendron tulipifera)EN 350-2 : 1994 American tulipwood has not yet been appraised for inclusion. Therefore the following classifications for durability and treatability are based upon practical experience. Natural Durability To Wood-Destroying FungiHeartwood - class 5 not durable The above classification provides an indication of the currently accepted characteristics and performance of wood in ground contact. EN 942 : 1996 Based upon the above durability classification the natural durability is deemed insufficient for exterior applications. American tulipwood can, in practice, be used externally if the correct design, detailing and construction techniques have been adopted, along with an effective preservative pre-treatment. To maintain the protective coating “envelope”, an on-going maintenance programme is recommended. EN 335-2 : 1992 Cross reference to ascertain the relevant hazard class. Moisture MovementEN 942 : 1996 Classed as medium. TreatabilityHeartwood - class 2 Moderately easy to treat The above classification refers to a set of broad descriptions for classifying treatability based upon general observations associated with the use of penetrating treatment processes.
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