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Wood technology 2, wood and moisture

Published: 30 November 2020

The course explains why the manufacturing process looks like it does based on the properties of the raw material. Describes strategies and process steps to ensure the quality and properties of the sawn product. The course is a continuation of the course Tree construction and anatomy.

About the course

The course is a continuation of the course Tree construction and anatomy and goes into more detail on what the relationship between wood and moisture looks like, what consequences moisture has for wood and how it affects the drying process as well as the properties of the dried product.

You will learn:

  • Moist air - basic concepts needed to understand wood moisture
  • Wood as a hygroscopic material
  • How much water is in wood?
  • What the term moisture ratio means and how to measure moisture content in wood
  • The importance of choosing the right moisture ratio for the wood with regard to strength properties, dimensional stability and biodegradation
  • Introduction of wood drying. Review of different types of industrial wood dryers and how to dry wood efficiently at sawmills today.

Course structure

The course comprises approximately a work effort of 40 hours. The course content is largely based on self-study and is divided into 5 modules, each of which is based on recorded lectures, literature, simple home labs and exercises as well as web-based examination.
Each module ends with an online meeting.

The contact with teachers takes place as feedback on submitted assignments and on one occasion for a summative workshop with other course participants and supervisors.


The main teacher is Margot Sehlstedt-Persson, assistant professor of wood physics at Luleå University of Technology. With more than 30 years of experience in research and teaching in wood material theory, durability and wood drying, Margot will guide you through the course.