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Gluing spruce butcher block to plywood

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Forum topic by TomB19 posted 02-28-2013 07:57 AM 641 views 0 times favorited 1 reply Add to Favorites Watch
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TomB19

37 posts in 690 days


02-28-2013 07:57 AM

Last fall, I built a rolling cart that has a 2 inch thick butcher block spruce top that is glued to 1/2 inch plywood. It was all going terribly well until I noticed the butcher block portion of the top is now curling upwards and away from the plywood, destroying the plywood. I’m not sure why it’s delaminating.

The spruce was stored indoors with the plywood for three months, before working it. I thought that would be plenty to bring the moisture content into the range, however, I don’t have a moisture meter and I know spruce is practically floating when I buy it. Sometimes your hand feels wet, just to lift it.

How bad is the idea of laminating butcher block to plywood? Can it be done successfully?

Any advice would be appreciated. Thanks!


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bondogaposis

2694 posts in 1073 days


#1 posted 02-28-2013 01:37 PM

I’m not aware of a way to do this successfully. Plywood is stable, the butcher block is not. The butcher block will respond to every change in humidity and expand or contract accordingly. The plywood being stable will retain its original size, your project is literally tearing itself apart, the forces of wood movement are quite powerful and can not be overcome by ordinary means. The correct way is to design a project to allow for wood movement rather than trying to contain it.

-- Bondo Gaposis

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