CEILING STRUCTURE AND METHOD FOR CONSTRUCTING CEILING STRUCTURE

To provide a ceiling structure and a method for constructing a ceiling structure which enable easy formation of a continuous airtight layer on face bars constituting the ceiling structure.SOLUTION: A ceiling structure 1 includes a ceiling joist 5, face bars 6A and 6B which are mounted on the ceiling joist and have opposite surfaces 6c and 6d facing each other in a horizontal direction, and an airtight layer 7 extending from the face bar 6A to the face bar 6B along the upper surfaces of the face bars 6A and 6B. The airtight layer 7 has an airtight sheet 7A which is provided on the face bar 6A and has a horizontal adjacent part 7a2 adjacent to the opposite surface 6d, and an airtight sheet 7C which is provided so as to straddle the opposite surface 6c from a face bar 6C over the face bar 6A, and has a horizontal overlapping part 7c overlapping the horizontal adjacent part 7a2. At least one of the horizontal adjacent part 7a2 and the horizontal overlapping part 7c is formed of a thermoplastic resin which can weld the horizontal adjacent part 7a2 and the overlapping part 7c by heating at a predetermined temperature or higher.SELECTED DRAWING: Figure 1 【課題】天井構造を構成する面材上に連続した気密層を容易に形成することができる天井構造及び天井構造の施工方法を提供する。【解決手段】天井構造１は、野縁５と、野縁に取り付けられ、水平方向に互いに対向する対向面６ｃ、６ｄを有する面材６Ａ、６Ｂと、面材６Ａ、６Ｂの上面に沿って面材６Ａから面材６Ｂに亘って延びる気密層７と、を備えている。気密層７は、面材６Ａ上に設けられているとともに対向面６ｄに隣接する横隣接部７ａ２を有する気密シート７Ａと、面材６Ｃから対向面６ｃを跨いで面材６Ａに亘って設けられ、横隣接部７ａ２に重なる横重なり部７ｃを有する気密シート７Ｃと、を有する。横隣接部７ａ２及び横重なり部７ｃの少なくとも一方は、所定温度以上の熱を加えることにより横隣接部７ａ２と重なり部７ｃとを互いに溶着可能な熱可塑性樹脂により形成されている。【選択図】図１