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Reverse cupping Answered

I have a repair job I'm taking care of and need some advice. I have two small wooden panels that have warped pretty good. Dimensions are 6.5" w x 18" l. It's 1/4" thick. Also, it's rift sawn w. oak. Any ideas on reversing the warp.

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NeilRG
NeilRG

11 days ago

The cupping is swelling of the wood on the convex side if it was due to shrinkage on the concave side the convex side might show signs of splitting depending on the species and thickness of the wood. Wooden boat builders have built steamers for large pieces some on an as needed basis. A good heat source would be a barbecue grill with a large metal container with water in it. I'd then use a metal clothes dryer ducting to conduct the heated steam into a metal container of an appropriate size. For a limited use and a smaller piece of wood, an oven roaster bag and water in a roasting pan might also be an idea.

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Downunder35m
Downunder35m

25 days ago

Usually I suggest a big pot and hot water but I doubt you have a container big enough.
Key is to soak the wood with really hot water, then to press and hold it in shape until dry.
Other option, if you have a pressure cooker would be to add a ose to the release valve and to place the wood in a suitably big box, container or such to let the steam do the work.