INTERIOR CONSTRUCTION METHOD

To provide an interior construction method capable of suppressing condensation in a concealing part between an indoor space and an outdoor space with a simple configuration.SOLUTION: A concealing part (22) comprises: an interior material (2) whose front face faces an indoor space; a heat-insulating material (3); a substrate material (4); and metallic screws (5, 5A) which penetrate the interior material, the heat insulating material, and the substrate material and protrude from the substrate material to the concealing part side. An interior construction method includes the steps of: preparing, as the metallic screws (5), the first metallic screw (5) with a short protrusion length that protrudes from the substrate material toward the concealing part side and the second metallic screw (5A) with a long protrusion length that protrudes from the substrate material toward the concealing part; selecting the first metallic screw (5) when the lowest setting temperature of an indoor space (21) is set to a relatively high T1; and selecting the second metallic screw (5A) when the lowest setting temperature of the indoor space (21) is set to a relatively low T2.SELECTED DRAWING: Figure 2 【課題】簡易な構成で、屋内空間と屋外空間の間の隠蔽部の結露を抑制することが可能な内装工法を提供すること。【解決手段】隠蔽部（２２）は、表面が屋内空間に面する内装材（２）と、断熱材（３）と、下地材（４）と、内装材、断熱材、および下地材を貫通し、下地材から隠蔽部側に突出する金属製ビス（５，５Ａ）とを備えている。内装工法は、金属製ビス（５）として、下地材から隠蔽部側に突出する突出長さが短い第１金属製ビス（５）と、下地材から隠蔽部側に突出する突出長さが長い第２金属製ビス（５Ａ）とを用意しておく工程と、屋内空間（２１）の最低設定温度が相対的に高いＴ１に設定される場合に、第１金属製ビス（１０）を選択する工程と、屋内空間（２１）の最低設定温度が相対的に低いＴ２に設定される場合に、第２金属製ビス（５Ａ）を選択する工程とを備える。【選択図】図２