Patent ID: 7877943

Claim:
A constructing structure of external corner portion for a building, comprising: an external corner wall material for forming an external corner portion by abutting external wall boards on each side, the external corner wall material comprising: two plate pieces being disposed to form substantially a right angle, wherein each of the plate pieces has an abutting portion at an end of each of the plate pieces, the abutting portion having an inclined end surface which can abut an inclined end surface of an external wall board disposed adjacent, a cutout portion formed behind the abutting portion, and a cutout portion formed on an upper shiplap portion; a base joiner to which the external corner wall material and an external wall board are installed, the base joiner comprising: a plate that is bent at substantially a right angle, a positioning guide for installing the external wall board and the external corner wall material to the base joiner, the positioning guide protruding out to a front surface side of the plate, the positioning guide being disposed so that the cutout portion formed behind the abutting portion of the external corner wall material can be disposed along with the positioning guide, and a water sealing material disposed along a height direction of the base joiner and between the positioning guide and an end portion of the plate; and an external wall board having an inclined end surface at an end thereof, wherein the base joiner is attached along two sides of a column via furring strips, the external corner wall material is abutted to the external wall board so that the inclined surface of the external corner wall material is mated with the inclined surface of the external wall board, the positioning guide of the base joiner is disposed in the cutout portion formed behind the abutting portion, and a packing is disposed at upper and lower junction portions of the external wall board, and abutting a front surface of the water sealing material and a back surface of the external wall board.