Structure for insulation and wasteproof of construction

PURPOSE: A building insulation waterproof structure is provided to efficiently prevent water from inflowing through an insulation panel and a waterproof panel by injecting a sealing material in order to be closely attached to the insulation panel and the waterproof panel. CONSTITUTION: A building insulation waterproof structure comprises a plurality of insulation panels (A), a plurality of waterproof panel (B), a sealing material (C), and a waterproof layer (D). The insulation panel is arranged on an upper surface of a rooftop (1) in order to comprise the widen plane and comprises a stepped unit (10) which is downwardly concave in the periphery of the upper surface. The waterproof panel is arranged on the upper surface of the insulation panel so that periphery surfaces are separated from each other. The sealing material is injected into between the waterproof panels and covers a gap (30) between the waterproof panels, the stepped unit of the insulation panel, and an upper periphery unit of the waterproof panel. The waterproof layer is laminated in order to cover the upper surface of the waterproof panel.