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Question: Can a curved neck be straightened on a classical guitar!?
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Hey V-nus

First and foremost, classical guitars are the worse fingerboard to stay straight and many have warped necks!. Bowed necks are almost impossible on classical guitars although it may happen!.

Classical guitars have hardly no tension on the neck!. On a curved neck, what I do is to check first, the bridge to make sure that none of the plys are unglued!.
Often, the top ply is unglued and unnoticable by eye and this rises the action considerable and throws tension on the wrong parts of the guitar!.

The first stage is to heat the neck by applying the correct pressure with the neck straightener!. This is the crucial part!. Too much heat can unglue the finger board from the neck!.

What has to be done first is to heat the neck without clamping!. After 30 min, we start using the clamp and tightening every so often until the correct bow is reached!. Tis is usually 1/8" dip in the center!.

A good luthier will use 2 popsicle stick spaced apart between the iron and the fingerboard!.
After 1 hour, we can stop the heat, let it cool, than unclamp!.

The neck should be perfect!. Let it cool for 24 hours and then string the guitar!.Www@QuestionHome@Com

In my terminology, "warp" always means a neck coming forward as a consequence of the force exerted by string tension and usually produces high playing action!. "Tilt" means a neck which is set back against the pull of the strings resulting in lower playing action!.

Since most classical guitar necks are not adjustable the corrections must be made in the wood by using heat and pressure or replaning and refretting and/or a combination of both approaches!.

Unless there is a structural problem (loose bridge, etc!.) leave the guitar fully strung so it can be playable when examined!. Without the normal pressure exerted by strings it is difficult for a repair technician to assess the guitar!.

It can be done, just don't attempt it yourself!.Www@QuestionHome@Com

Your would have to have it checked out by a luthier!.!.!.!.!.I've had several classical guitars, in fact I teach that and acoustic!.!.!.!.and I've never run into this problem, and I've played for over thirty five years!. I wish that you would have said if this was a good guitar or just a beginners!.!.!.!.!.because if the latter I doubt it, and it would probably cost most to have it fixed then if you were to buy a new one!.!.!.!.!.If your can't find an expert take it to the Guitar Center their pretty good there, and they could advise you as to what could be done, just take it in for a consultation, I don't think that they will charge you, good luck !!!!!!!!!!Www@QuestionHome@Com

A guitar tech can do a lot for a damaged guitar but a neck is
almost "major surgery" in the sense that it "may" never work
exaclty as before!. Try a Tech person and ask for the cost!.

If the guitar cost you less than $300!. Personally I won't try to
repair it!. I will just let it go and buy another one!.
I am wondering what happen to the guitar that the neck was
"curved" as you call it!.
I play classical guitar and the very best advice a guitar tech told me was :
NEVER put steel-strings on a classical guitar!.

A "curved" neck could be the result of using steel-strings on a
guitar built for nylon strings!.
Of course there other reasons but the one I just mention would be almost always the main reason for a "curved" neck!.

Good Luck and whatever you find out - Remember it Well and
save your self future troubles and expenses!.Www@QuestionHome@Com

It could, but it's not worth it because it will never stay in tune!. The rosewood they use to make the necks on a classical Martin or Ovation are pretty durable so your ax must've took some bad moisture! You should always put them in their case when you're done playing because they should never feel the sun's warm rays, Bro! 12 strings should be treated like mushrooms: store in a cool, dark place!.!.!.Www@QuestionHome@Com