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Oak worktop cupped

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Forum topic by ButlerSam posted 05-16-2017 03:37 AM 436 views 0 times favorited 5 replies Add to Favorites Watch
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ButlerSam

2 posts in 216 days


05-16-2017 03:37 AM

Topic tags/keywords: wood cupping oak liveedge

Hi,
First time here, I’ve read many posts on lumberjocks and they’ve been very helpful. I have my own problem now and would appreciate any advice.

I bought an oak live edge board a few months ago in attempt to make a coffee table, I left it for a month before working on as I was advised at the yard.

From the get go I’ve had problems with cupping, both ways. I planed it nearly perfectly flat and sanded it ready to finish.

Stupidly I coated one side with hard wax oil and left the other side for a few days. Of course, it cupped. Badly. I’ve sanded the oil off to let it breath but it’s not going back. What can I do to get it back flat?!

Any suggestions would be welcome.
Thanks


5 replies so far

View TungOil's profile

TungOil

748 posts in 335 days


#1 posted 05-16-2017 03:53 AM

Be patient and sticker it for a while, might take a few weeks. The key is to allow good circulation all around the slab. As you have discovered, it’s best to finish both sides evenly and at the same time. If it doesn’t fully flatten back out you might need to flatten it again unfortunately.

-- The optimist says "the glass is half full". The pessimist says "the glass is half empty". The engineer says "the glass is twice as big as it needs to be"

View Rick_M's profile

Rick_M

10642 posts in 2220 days


#2 posted 05-17-2017 05:49 AM

A frequent suggestion is leave the wood concave side down on morning grass in the sun for an hour or two. The sun will dry one side, the grass will bring moisture to the other. I’ve never done it and it sounds risky but it might work.

-- http://thewoodknack.blogspot.com/

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ButlerSam

2 posts in 216 days


#3 posted 05-17-2017 06:48 PM

Thanks guys!
Tung oil, thanks for the advise, what do you mean by sticker it?

Rick M, thanks, I’m from the uk so finding a sunny day may be problematic!

I’ve attached a few photo s so anyone can see my problem.

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TungOil

748 posts in 335 days


#4 posted 05-17-2017 07:16 PM

stickers = long thin strips of wood. 3/4” x 3/4” would be a typical size, but not critical. Just to get equal air exposure to all sides of the slab

-- The optimist says "the glass is half full". The pessimist says "the glass is half empty". The engineer says "the glass is twice as big as it needs to be"

View Ripper70's profile

Ripper70

618 posts in 748 days


#5 posted 05-17-2017 07:33 PM

Stickered wood:

-- "You know, I'm such a great driver, it's incomprehensible that they took my license away." --Vince Ricardo

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