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Little ridges on butcher block style counter top

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Forum topic by Bigbuck posted 10-12-2008 10:30 PM 1216 views 0 times favorited 7 replies Add to Favorites Watch
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Bigbuck

1347 posts in 3477 days


10-12-2008 10:30 PM

I made a counter top out of 8/4 hard maple stood on edge that was ~ 2.5 inches thick. I sanded it smoth and put on 6 coats of tung oil. A few weeks latter my smooth counter top developed small ridges at each of the glue joints. You can’t see the ridges but they grab your fingers as you wipe your hand over the top.

My question is what caused these small ridges to develop and how do I prevent them in the future?

Thanks for your help

-- Glenn, New Mexico


7 replies so far

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Joey

276 posts in 3630 days


#1 posted 10-13-2008 04:07 AM

Is it end grain or long grain? My guess is long grain. Even if the wood is the same species it my swell and shrink differently. just enough that you can feel the difference but not see it. you can try scraping or hand planeing to make sure all joints are perfectly lever, but as wood swells and contracts from moisture it may continue to do it.

-- Joey, Magee, Ms http://woodnwaresms.com

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Bigbuck

1347 posts in 3477 days


#2 posted 10-13-2008 09:59 PM

Thanks, I kind of suspected that might be the cause

-- Glenn, New Mexico

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motthunter

2142 posts in 3613 days


#3 posted 01-18-2009 05:29 PM

I would scrape it and refinish it. The joints may swell again. but after you have done this a few times, it should be less and less

-- making sawdust....

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Brad_Nailor

2539 posts in 3771 days


#4 posted 01-18-2009 05:45 PM

I have made quite a few edge grain or long grain cutting boards and that is exactly what it is. I sand to perfection and soak them with mineral oil, but once they dry up a little almost always they develop the little edges you are talking about. You cant see them, but you can feel them ever so slightly when you run your hand over the board. Motthunter is right, the ones that I have made and kept for myself, I have re sanded and sealed one twice and the other one once and the one I re sanded twice is fine… there was hardly any at all after the second re finish (that board is 6 years old).

-- http://www.facebook.com/pages/DSO-Designs/297237806954248

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Bigbuck

1347 posts in 3477 days


#5 posted 01-18-2009 06:05 PM

Thanks for all the great info Guys

-- Glenn, New Mexico

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childress

841 posts in 3356 days


#6 posted 01-18-2009 06:18 PM

I have actually run some 400 grit over a board and they dissapear. Try that before planing and refinishing. You might need to put one more coat of finish on top though

-- Childress Woodworks

View Moron's profile

Moron

5032 posts in 3708 days


#7 posted 01-18-2009 07:20 PM

the reasons this can happen are almost endless.

the lumber wasnt dry enough

the glue hadnt cured before sanding/machining so that the expanded wood due to the application of glue, was sanded off, the glue cures and it leaves an indent or “line”

grain from one piece is considerably differnt orienatation from adjacent wood.

clamped too tight causing too much glue to be removed and therefor joint fatigue

and on and on and on

-- "Good artists borrow, great artists steal”…..Picasso

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