Cracked/split top

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phavriluk
Posts: 658
Joined: Mon Jul 09, 2012 9:49 pm

Re: Cracked/split top

Post by phavriluk »

I suspect that building in dryer (drier?) conditions would be conducive to avoiding cracks in the future. I wouldn't be humidifying a wintertime dry work area.

Some years ago I had a discussion with Dave Nichols on this very topic. He stopped building in the summer and waited for humidity to settle down during cooler weather. He absolutely did not humidify during heating season.

This reflexive genuflection to the sainted 45 percent can be overblown and it needs to be carefully considered, not just automatically pursued.

And all nine of my scratchbuilt guitars followed Dave's shop practice, no problems yet.
peter havriluk
MaineGeezer
Posts: 1823
Joined: Wed Aug 13, 2014 12:14 pm

Re: Cracked/split top

Post by MaineGeezer »

Consider the implications of building at 50% humidity. The guitar is never likely to be more than 25% from its build humidity. The humidity can drop to 25% or go up to 75% and the stress on the guitar is still at most the stress caused by a 25% humidity change. If the change can be made to happen "slowly," e.g. keep the guitar in a closed case for a week after moving it so the guitar can gradually adjust, I would guess the guitar would be fine.

So does anyone believe that?
Don't believe everything you know.
Anything is possible if you don't know what you are talking about.
When things are bad, try not to make them any worse, because it is quite likely they are bad enough already. - French Foreign Legion
MaineGeezer
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Joined: Wed Aug 13, 2014 12:14 pm

Re: Cracked/split top

Post by MaineGeezer »

Duplcate post
tippie53
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Re: Cracked/split top

Post by tippie53 »

I had been at daves shop many times, and he did in fact humidify , he use a lasko humidifier , they do a great job if you can hold at 42% your fine.
John Hall
Blues Creek Guitars Inc
Authorized CF Martin Repair Center
president of Association of Stringed Instrument Artisans
http://www.bluescreekguitars.com
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