Reply by splatman

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Posted on Expansion and Contraction..Am I thinking correctly

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586 posts in 2009 days

#1 posted 02-10-2017 12:55 AM

I have never seen a countertop with a mitered corner. If such a miter was fastened with long-enough Dominoes, T-bolts, or anything else that does not allow the joint to let go, some other horrible thing will happen. Probably tear loose from the cabinets or even tear the cabinets loose from the wall or floor, depending how well it’s fastened to the cabinets.

To have the solid walnut look with none of the downfalls, band saw the walnut boards into ~1/8”-thick boards, plane and/or sand them, then glue them to a plywood substrate. Apply finish to both sides and all edges (especially in the sink hole) to protect it from kitchen humidity. Seasonal movement will still occur, only to a much lesser degree, and since it’s essentially plywood, probably irrelevant.

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