to rip and reglue or leave wide and glue

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Forum topic by Andy posted 03-13-2008 11:59 PM 1243 views 0 times favorited 6 replies Add to Favorites Watch
View Andy's profile


13 posts in 4358 days

03-13-2008 11:59 PM

Topic tags/keywords: question

I have been told that wide boards flat sawed should be ripped and re glued to prevent cupping. Does it really make a difference. You just end up with more glue joints. The wood is fir total width is 14” wide and 3’ high.

6 replies so far

View GaryK's profile


10262 posts in 4598 days

#1 posted 03-14-2008 12:02 AM

I would only do that if they had already cupped.

If the wood is already dry it shouldn’t cup as long as you have some kind of finish on it to stop it from absorbing any more moisture.

How thick is it now?

-- Gary - Never pass up the opportunity to make a mistake look like you planned it that way - Tyler, TX

View Andy's profile


13 posts in 4358 days

#2 posted 03-14-2008 12:46 AM

I have planed it to 3/4”. It was air dryed for quite a while but some how got wet again I have it drying now and will glue in a couple of days.

View LONGHAIR's profile


94 posts in 4424 days

#3 posted 03-15-2008 12:00 AM

It was air dryed for quite a while but some how got wet again

While it is certainly possible for water to soak into the wood, for whatever reason, it is really not the same as when the wood was “green”. The original drying gets the fliud out of the cells and cell walls, once that has happened it will never be “green” again. Water-wet yes, but that will dry significanly faster since it is not “in” in the same way.

View Mark E.'s profile

Mark E.

387 posts in 4352 days

#4 posted 03-15-2008 12:03 AM

It has never made sense to me to cut anything in half just so that it can then be glued back together.

-- Mark

View Peter Oxley's profile

Peter Oxley

1426 posts in 4484 days

#5 posted 03-15-2008 01:03 AM

The reason to cut down wide boards is to prevent cupping, but you can’t just re-glue them the way they came apart. You have to flip over 50% of the boards so the growth rings are oriented in alternating directions. This way if one board cups toward the front of the panel, it’s “neighbor” is likely to compensate by cupping toward the back of the panel.

I’m with Gary, though. If it’s been dried and planed and hasn’t cupped, you’re probably okay.

-- -- --

View ND2ELK's profile


13495 posts in 4384 days

#6 posted 03-15-2008 01:25 AM

Hi Andy

You probably will be alright with fir. At work we never glued up boards wider than 3” and put a reverse glue joint on the edges. Most of our furniture was soild oak. Question to ask : Does doing more glue joints take more time than repairing or replacing a top?


-- Mc Bridge Cabinets, Iowa

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