In the Thesis, prototypes of insulating boards from agricultural and woodworking by-products and technology for their production were developed. Low-density insulation boards for indoor spaces were produced by varying their structure and the amount of phase change materials in the board up to 15 %. The usage of carbamide resin binder for cold pressing reduces energy consumption, and the produced boards have a number of advantages compared to those currently used in practice, such as high heat capacity at low material thickness, good sound absorption, and flammability class.