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How long for braces to acclimate?
Chuck D

Total Topics: 5
Total Posts: 18

This morning I planned to glue the top braces to my guitar top. My workshop is in a basement in a small area with plastic walls/ceiling and a dehumidifier inside to keep the humidity below the rest of the basement. I realized that although my guitar top was in my workshop at about 48% humidity, the braces had been moved outside of the workshop--which is around 53%.

Now this seems like a small amount, but I have a feeling it isn't trivial. I moved the braces into the workshop area--any idea how long i should wait for the braces to acclimate for gluing?


Feb 15, 10 | 8:10 am

Total Topics: 38
Total Posts: 480
My target would be 1 week. But maybe others think different. The braces of my last back were glued by 45% humidity. The week after it raises to 55% and the back cupped against direction of the braces. As soon the humidity dropped is disappeared. So 10% is an issue over here.

Feb 15, 10 | 8:53 am

Total Topics: 38
Total Posts: 480
correction: The back cupped when the humidity dropped instaed of raising. Sorry ma bad.

Feb 15, 10 | 9:43 am

Total Topics: 29
Total Posts: 448
The braces are not going to shrink measureably ALONG the grain, which is how they should be cut. It should not be a problem. I failed to acclimate some walnut flooring and there are no gaps at the ends of the boards but along the length they separate in the winter because wood shrinks and expands along the width of the grain, not the length.

Smarter people can feel free to correct me now, but I am certain 5% ALONG the length wont cause a problem.

Feb 15, 10 | 1:29 pm
Ken Cierp

Total Topics: 58
Total Posts: 2262
At the Larrivee factory components are assembled in a special room that is about 45% humidity --- they wait at least 48 hours (not weeks) before using new stock brought into the area. That sounds about right to me. Moisture enters and leaves "dried wood, kiln or otherwise" very rapidly.


Kenneth Michael Guitars est. 1978

Feb 17, 10 | 4:31 am

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Total Posts: 448
I told you people smarter than I would be doing some correcting! I should put a disclaimer on my posts saying "Tony_in_NYC does not know that much about lutherie and you probably should not listen to him." :o)

Feb 17, 10 | 8:48 am
Bill Cory

Total Topics: 158
Total Posts: 3584
Tony -- LOL -- Don't feel like the Lone Ranger ... we all get corrected around here all the time, to one degree or another. That's why this has to be a "No Ego Zone." :-)

Feb 17, 10 | 9:17 am

Total Topics: 29
Total Posts: 448
Bill...I have to correct you there. I have never corrected anyone! Oops...I never corrected anyone until now. LOL
Don't worry about me, I have no ego. I checked it at the door the day I said "I do." It solves a lot of problems.

Feb 17, 10 | 11:35 am

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