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Wood movement and glue lines ...

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Forum topic by Lip posted 156 days ago 296 views 0 times favorited 7 replies Add to Favorites Watch
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Lip

149 posts in 950 days


156 days ago

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

View degoose's profile

degoose

2029 posts in 255 days


156 days ago

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 once, cut twice. New website up.... lazylarrywoodworks.com.au

View Lip's profile

Lip

149 posts in 950 days


156 days ago

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

Thanks!

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

View Gene Howe's profile

Gene Howe

334 posts in 328 days


155 days ago

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

-- Gene

View Thos. Angle's profile

Thos. Angle

4013 posts in 862 days


155 days ago

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

View John Ormsby's profile

John Ormsby

503 posts in 637 days


155 days ago

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

Julian

698 posts in 425 days


155 days ago

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

Lip

149 posts in 950 days


155 days ago

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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