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Surprisingly, many woodworkers do not have moisture meters, and of those who do own them, most seldom use them. With wood being as active as it is, it seems that using a moisture meter to help determine the amount of wood movement would be pretty important. To novice woodworkers, wood movement is something that is not well understood, but it is a very important component of woodworking and needs to be studied by any serious woodworker. As we all know, wood, even after it is cut is constantly either absorbing moisture or giving off moisture. This is the a nature of wood. The absorption of moisture is primarily taken in through the end grain of wood, but some moisture is absorbed through the side side grain as well.
The result of this moisture absorption is that the cells of the wood expand, and can, in some situations, damage woodworking projects by breaking glue joints, expanding doors, having some wood material bow, and generally making your hard created woodworking project distorted at the least and even destroyed in rare conditions.
But as everyone knows who is working with wood, movement needs to be understood in order without the wood coming apart on you or reacting in some way you don't know. Knowing how moisture meters work can help you understand how to use them properly ....