What Causes An Instrument's Neck to Warp ? When wood is subjected to extreme temperatures and humidity it becomes vulnerable to warping. A prime example of this comes from the construction of a cane chair where the wood is put ' into a pressurized steamer until it becomes flexible enough to be easily formed into it's shape. This is essentially what is happening when the neck of an instrument is subjected to high temperatures, such as an instrument that is left in a hot gig trailer or trunk on the way to or from a show. Once this has occured, the neck will remain in that position even once the string tension has been relieved. Our process of heat treatment will allow the neck to return to it's original state with just the right amount of relief for proper setup