Method for the horizontal production of a supporting vertical precast concrete part, in particular a building wall or a column, comprising the following steps: a) providing a substantially horizontally aligned formwork panel with a formwork fixed on the formwork panel and projecting from a panel plane of the formwork panel, wherein the formwork panel and the formwork define an inner region to be filled with concrete and the formwork has at least one formwork element which comprises - a base body with a first contact surface facing the inner region for the concrete to be filled in and a second contact surface facing an outer side of the formwork for the subsequent connection of a horizontal building part, in particular a basement ceiling or a floor ceiling, and - at least one force-transmitting element (31, 32, 33) which passes through the base body from the first contact surface to the second contact surface and extends beyond the first contact surface and the second contact surface, b) laying a reinforcement in the inner region, c) pouring liquid concrete into the inner region, d) compacting the liquid and reinforced concrete, e) hardening the compacted, liquid and reinforced concrete, and f) stripping the hardened, compacted and reinforced concrete, wherein the at least one formwork element remains as permanent formwork on the hardened concrete; characterized in that the base body has, at least in sections, a layered structure of thermally insulating and/or compressive force-transmitting layers and the layered structure comprises at least one core layer of thermally insulating or thermally insulating and compressive force-transmitting material and at least two outer layers (42, 43) of compressive force-transmitting material, each of which bounds the core layer on one side. a) providing a substantially horizontally aligned formwork panel with a formwork fixed on the formwork panel and projecting from a panel plane of the formwork panel, wherein the formwork panel and the formwork define an inner region to be filled with concrete and the formwork has at least one formwork element which comprises - a base body with a first contact surface facing the inner region for the concrete to be filled in and a second contact surface facing an outer side of the formwork for the subsequent connection of a horizontal building part, in particular a basement ceiling or a floor ceiling, and - at least one force-transmitting element (31, 32, 33) which passes through the base body from the first contact surface to the second contact surface and extends beyond the first contact surface and the second contact surface, - a base body with a first contact surface facing the inner region for the concrete to be filled in and a second contact surface facing an outer side of the formwork for the subsequent connection of a horizontal building part, in particular a basement ceiling or a floor ceiling, and - at least one force-transmitting element (31, 32, 33) which passes through the base body from the first contact surface to the second contact surface and extends beyond the first contact surface and the second contact surface, b) laying a reinforcement in the inner region, c) pouring liquid concrete into the inner region, d) compacting the liquid and reinforced concrete, e) hardening the compacted, liquid and reinforced concrete, and f) stripping the hardened, compacted and reinforced concrete, wherein the at least one formwork element remains as permanent formwork on the hardened concrete; characterized in that the base body has, at least in sections, a layered structure of thermally insulating and/or compressive force-transmitting layers and the layered structure comprises at least one core layer of thermally insulating or thermally insulating and compressive force-transmitting material and at least two outer layers (42, 43) of compressive force-transmitting material, each of which bounds the core layer on one side.