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Posted on Dead Stacking Kiln Dried Lumber?

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NGK

93 posts in 537 days


#1 posted 524 days ago

Nomad62——-You need to get your facts straight. Stickering does not “reduce sticker stain”, it causes it. Often this is the case when the stickers are a darker wood than the light-colored woods like sycamore, pine, and especially holly if any of us are lucky enough to have that much holly or that size. Stickering stain is often caused by the mold which is allowed to grow where the sticker touches the moist board—that zone where the drying air can’t get into soon enough.. It helps if stickers themselves have been kiln-dried or are a less dense species.

You are correct in saying that in general mold will not grow below 15% moisture, but it possibly could in moderately high temperature and humidity, with moisture creeping in the sides of the stacks.

A kiln-dried stack at 6 or 8 or10 or 12 percent moisture will again creep slowly up to 15 percent moisture if not wrapped in plastic. The lumber always tries to get back up the the EMC (environmental moisture content) for the average humidity lever for that area of the country. This number is 15 percent here in the Midwest (think Big 10 basketball).


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