Wood movement and glue lines ...

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Forum topic by Lip posted 06-27-2009 09:07 AM 1098 views 0 times favorited 7 replies Add to Favorites Watch
View Lip's profile


158 posts in 3468 days

06-27-2009 09:07 AM

Topic tags/keywords: question walnut mahogany finishing sanding

I have a couple of projects I made out in California. There is a toolbox made out of Jatoba that was finished with a wipe on poly in December, some small boxes and items made out of Mahogany that were finished with Antique Oil in December and the others are some nightstands and a coffee table made out of Walnut that were finished with Tung Oil in late April. I’ve been checking in on these almost daily for the last month because I knew the humidity here in Indiana was going to cause quite a bit of movement in the wood. Sure enough, as the humidity has really started to ramp up over the last two weeks, I’ve seen the wood swell up by about the thickness of a business card. Like I said, that was expected and is not the problem.

The issue I’m having is that as I run my hand over any of the glue lines, it almost feels like there is a slight bur running the length of the glue line. The bur seems to be consistent on every glue line for all three woods and in panels and glue ups of various thicknesses. The only thing they all have in common is the glue which was Tight Bond II. Just to clarify, all but two of these glue ups were run through a drum sander then hand sanded before finishing and waxing so I know they were spot on.

I was just curious as to whether anyone knows what is going on or has experienced this before.

Any advice would be greatly appreciated.

-- Lip's Dysfuncational Firewood Farm, South Bend, IN

7 replies so far

View degoose's profile


7193 posts in 2773 days

#1 posted 06-27-2009 09:33 AM

Hi lip man
this is called glue lift and it happens when you change the temperature or humidity,
I read that it will happen with most glues but water based resin doesn’t have this problem..,I don’t even know what water based resin glue is but I think that I read it in a blog by Robin Tucker AKA Woodmosaics here on LJs

-- Drink twice... and don't bother to cut... @ For lovers of all things timber...

View Lip's profile


158 posts in 3468 days

#2 posted 06-27-2009 10:53 AM

lol @ “I don’t even know what water based resin glue is…”

That makes two of us … thanks for the input … I’ve never heard of it before … but really happy to know that it’s common enough to have a name … so I can tell the wife like I know what the hell I’m talking about!!! lol


-- Lip's Dysfuncational Firewood Farm, South Bend, IN

View Gene Howe's profile (online now)

Gene Howe

8085 posts in 2846 days

#3 posted 06-27-2009 02:25 PM

So Lip, Whatcha gonna do about it? Scrape and refinish?

-- Gene 'The true soldier fights not because he hates what is in front of him, but because he loves what is behind him.' G. K. Chesterton

View Thos. Angle's profile

Thos. Angle

4445 posts in 3380 days

#4 posted 06-27-2009 03:08 PM

I had this problem with TBII just coming from the shop to the house. I went back to Tite Bond I and had no more problems. I’m still mistified.

-- Thos. Angle, Jordan Valley, Oregon

View John Ormsby's profile

John Ormsby

1283 posts in 3155 days

#5 posted 06-27-2009 03:40 PM

Yellow glues are flexible and move quite a bit. That is why they are not used for veneering. One will get movement at the joint when used for edge gluing. Using a resin glue will resolve this issue. Resin glues, which are used in boat building and veneering, dry hard and will not expand and contract in the same way as yellow or PVA glues.

-- Oldworld, Fair Oaks, Ca

View Julian's profile


880 posts in 2943 days

#6 posted 06-27-2009 04:15 PM

Water based resin glue is a plastic resin glue. If you ever watched David Marks show on diy then you have seen it used.

-- Julian, Park Forest, IL

View Lip's profile


158 posts in 3468 days

#7 posted 06-28-2009 10:03 AM

Thanks guys … I appreciate all the input … I’m just happy to know I’m not crazy! lol

To answer your question Gene, I haven’t actually figured out what I’m going to do. I’m thinking I might be better of waiting another couple of weeks to see if it gets worse before I even think about refinishing them. I’d hate to go through all that trouble only to find out the glue wasn’t done moving. If anything, I may pull the tops off and mess with them first. I’ll keep you guys posted on how it goes in the coming weeks.

-- Lip's Dysfuncational Firewood Farm, South Bend, IN

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