This paper is a study on renovation to make a new skin on building envelope by dry method. The discussion about countermeasures how to fix fall troubles of external finishing which covers GRANDSHIP in Shizuoka City is examined as a case study, the followings are pointed out: firstly scope of consideration to add a new skin to existing envelope is clarified. Secondary the risks of modifying works to envelope are categorized to two types: one can avoid them by modifying design, the other can’t. Finally the process model to compare means of renovating building envelope is proposed.
