Abstract
A new renewal method for deteriorated external walls of existing buildings had been popularized. The method is applied polyvinylalcohol fiber net and polymer modified cement mortar overlaying with stainless steel anchoring. The durability of the method has been reported in the 2005 annual meeting. The report has been based on investigation into the actual conditions of a cooperative house that has been renewed 10 years ago with the method. In this report, it is mentioned that actual condition investigation result of the other cooperative house that has been renewd 15 years ago and outdoor exposure test result for 12 and half years. Based on these results, it is cleared that no remarkable deterioration has been occured and item that is taken into consideration in construction planning.