The success of repairs of dry rot (Serpula lacrymans) damage in small houses was studied by means of a questionnaire, interviews and inspections. The research material consisted of 92 buildings in the first follow-up survey and of 71 of those 92 buildings in the second survey 6 years later. In 55 buildings the damages had been repaired once and at that time the harmfulness of dry rot fungus was known. In all these cases the repairs had been successful. In the last study there were 15 buildings where dry rot damages had reoccurred once or more often and in 8 cases the repairs made in these buildings were now successful.