PROBLEM TO BE SOLVED: To provide a valley gutter for a vinyl house suppressing occurrence of moisture condensation in the valley gutter itself, and a manufacturing method for the same.SOLUTION: A valley gutter 1 for a vinyl house is arranged along a longer direction of a trough between adjacent vinyl houses and a heat insulator 7 is stuck on an undersurface of the valley gutter body 6. The stuck heat insulator 7 on the undersurface of the valley gutter body 6 suppresses occurrence of moisture condensation on the undersurface of the valley gutter caused by temperature difference between inside of the house and outside thereof. Cool air of the valley gutter body is blocked by the heat insulator on the undersurface so that the cool air is suppressed from being transmitted into the house.【課題】谷樋自体の結露の発生を抑制したビニルハウス用谷樋およびその製造方法の提供。【解決手段】隣接するビニルハウス間の谷部長手方向に沿って配設されるビニルハウス用谷樋１であって、谷樋本体６の下面に断熱材７が貼着されたものであり、谷樋本体６の下面に断熱材７が貼着されているため、ハウス内外の温度差によって谷樋下面の結露の発生が抑制される。また、谷樋本体の冷気も下面の断熱材により遮断されるので、この冷気がハウス内に伝達されることも抑制される。【選択図】図２
