In thisthesiswedealtwiththequalitiesofwood, itsassessment in viewofusability and firesafety. In theexperimental part ofthethesisthere are processedmeasurements, wherewetestedthreetypesofselecteddeciduoustrees. Measurementswerefocused on thecomparisonofdomesticapple, cherryblossom and domesticplum.The test methodswhatwereused:- a radiantheat test wheretheweightlosswasevaluated,- Flammability test in the hot airoven, wheretheflash and ignitiontemperatureisdetermined.