The ventilation opening device in the next roofing structure

摘要

PURPOSE:To shorten the construction period by projecting a ventilating cylinder which communicates to the inside of a small house on a roof surface and covering the ventilating cylinder from outside by a dormer-shape structure for decoration. CONSTITUTION:A funnel-shaped ventilating cylinder B which communicates to the inside of a rafter member 11 treats rain between a roof plate member D and projected on a horizontally laid roof A surface. The top part of the ventilating cylinder B is cut along the roof slope, and formed into an opened port part 15. Then, a dormer structure C which has a triangle-shaped roof surface 17 and has a ventilating port part Ca consisting of the ventilating pieces 18 which are arranged in parallel through a gap on the front surface side is formed. Then, the dormer structure C is attached on a horizontally laid roof A surface so as to cover a ventilating cylinder B. Accordingly, the air inside a small house can be discharged outside.