Outer wall structure and outer wall construction method

摘要

PROBLEM TO BE SOLVED: To achieve both ventilation and waterproofing in a ventilation layer of an outer wall with a water drain having a simple structure. SOLUTION: The outer wall structure has a ventilation layer (20, 32) between a frame member (21, 31) on the lower floor side and the upper floor side and an outer wall surface member (22, 32) on the lower floor side and the upper floor side. An outer wall on which 30) is formed and a drain (40) fixed to a lower end of a frame member on the upper floor side are provided. The drainage has a contact portion (41) that abuts on the outdoor surface of the frame member on the upper floor side, and a plurality of ventilation holes that project outward from the lower end of the contact portion toward the back surface of the outer wall surface member on the upper floor side. From the first overhanging portion (42) provided with (42a), the first hanging portion (43) extending downward from the outer end of the first overhanging portion, and the lower end of the first hanging portion, the outside on the lower floor side. It includes a second overhanging portion (44) that extends outward over the upper end surface of the wall surface member, and a second hanging portion (45) that extends downward from the outer end of the second overhanging portion. [Selection diagram] Fig. 2