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Small slits or holes are poked in lumber when it is incised. It is done before treating the lumber with chemicals. Some lumber does not require incising. Lumber that doesn't require incising are Southern softwoods.

Incising does effect the ultimate strength of the lumber, but not by much, say 2 to 5%. It is still considered a good trade off if the lumber is having additional value added treatments.

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14y ago

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