The main topic of the diploma thesis is experimental measurment of thermophysical properties wood-fiber insulating materials. There are several methods of measuring properties, the research uses the extended dynamic plane source method. The thesis is systematically divided, while the first chapter deals with definiton of basic facts about the method of heat transfer and physical quantities used in the measurment. The second part deals with the termal isulation material, especially fiber board, method of production, advantages and use. The next part briefly characterizes the methods of measuring the termophysical properties and reasoned choice of a specific method. The practical part deals with the measurement of properties, their comparison in different ways and evaluation of the results.