Bridges coming off due to under humidifying?

[Kerry Krishna]

There  is a thread over on one of the Forums right now with a person claiming that lack of humidity pulled two bridges of his two guitars in a single month. Is there anyone here that can speak to this? I will be shocked if this is at all possible. The bridges HAD to be almost off the guitars already right? Thanks for any responses..

[Frank Ford]

One source of low humidity is in a hot parked car, where the heat can really weaken bridge glue joints. . .

[Pierre-Antoine Roiron]

To my knowledge, dryness is not a problem. There should be another parameter that guy is missing in his problem analysis.

[Kerry Krishna]

Thanks you two. I pretty much knew this to be a fact, but did not want to say so on that Forum without some backup. I think that the problem was , that he did not see that the bridges were almost off both guitars before he wend were ever he did for that month..

[Pierre-Antoine Roiron]

That's one of the possibilities. It happens sometimes at my workshop : a customer brings a guitar in and I say "Mmmh, this bridge is lifted a bit... see?" and the man says "Really? Well I did not noticed.". Except everything is in original version, in French.

[Guitar Fixer]

 A soundboard with extremely low moisture content will sink or collapse into the body cavity stressing or breaking the adhesive bond under the bridge. Often when the moisture equilibrium is restored the top domes again and the gap becomes apparent.

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[Gary Fried]

I have seen this before. I have many customers that come into my shop with an acoustic for a setup in the winter time complaining of buzzing. I always grab my straight edge and lay it across the top behind the bridge to see how flat it has gotten. It seems that the if the top flattens enough the glue line will begin to separate.

[Kerry Krishna]

Thanks everybody. It seems I can always count on you folks for great advice... Kerry K in Northern BC