Method for the construction of a building comprising wooden wall panels and wooden floor panels, essentially comprising the steps of: - providing a plurality of wooden panels capable of defining the walls of a building, so-called wall panels, wherein each wall panel has two opposing vertical side faces, a pair of vertical opposing sides and a pair of horizontal opposing sides, and of these horizontal sides one is higher and the other is lower; - providing at least one vertical side of each wall panel with a respective continuous longitudinal groove, forming a corresponding longitudinally grooved side of the wall panel; - stably juxtaposing in a vertical arrangement at least two wall panels in a position corresponding to respective longitudinally grooved sides, forming between said at least two wall panels a respective vertical wall formwork cavity, open at least at the upper vertical end and extending substantially for the entire height of said at least two wall panels juxtaposed with one another; - providing in the lower end area of said wall formwork cavity at least one corresponding lower fluid injection channel; - providing in the upper end area of said wall formwork cavity, respectively above said wall formwork cavity, at least one corresponding upper vent opening; - introducing into said wall formwork cavity at least one vertical metallic building reinforcing element, of a length substantially equal to or greater than the height of said at least two wall panels juxtaposed with one another, thereby providing a free cavity between said at least one reinforcing element and said wall formwork cavity; - providing means for the pressure injection of a hardening adhesive, comprising nozzle delivery means capable of airtight engagement of said at least one lower fluid injection channel of said wall formwork cavity; - air-tightly inserting said nozzle delivery means of said pressure injection means of a hardening adhesive into said lower channel of said wall formwork cavity; - pressure injecting from below, by means of said pressure injection means and through said at least one lower fluid injection channel, of a quantity of hardening adhesive to fill at least said cavity of said wall formwork cavity, having the air vent through said at least one upper vent opening; - hardening the quantity of hardening adhesive pressure injected from below at least into said cavity of said wall formwork cavity, thereby forming a solid body including the quantity of hardened adhesive in said wall formwork cavity, together with said at least two wall panels, juxtaposed with one another side by side in a vertical arrangement, and said at least one vertical building reinforcing element placed in said at least one wall formwork cavity. - providing a plurality of wooden panels capable of defining the walls of a building, so-called wall panels, wherein each wall panel has two opposing vertical side faces, a pair of vertical opposing sides and a pair of horizontal opposing sides, and of these horizontal sides one is higher and the other is lower; - providing at least one vertical side of each wall panel with a respective continuous longitudinal groove, forming a corresponding longitudinally grooved side of the wall panel; - stably juxtaposing in a vertical arrangement at least two wall panels in a position corresponding to respective longitudinally grooved sides, forming between said at least two wall panels a respective vertical wall formwork cavity, open at least at the upper vertical end and extending substantially for the entire height of said at least two wall panels juxtaposed with one another; - providing in the lower end area of said wall formwork cavity at least one corresponding lower fluid injection channel; - providing in the upper end area of said wall formwork cavity, respectively above said wall formwork cavity, at least one corresponding upper vent opening; - introducing into said wall formwork cavity at least one vertical metallic building reinforcing element, of a length substantially equal to or greater than the height of said at least two wall panels juxtaposed with one another, thereby providing a free cavity between said at least one reinforcing element and said wall formwork cavity; - providing means for the pressure injection of a hardening adhesive, comprising nozzle delivery means capable of airtight engagement of said at least one lower fluid injection channel of said wall formwork cavity; - air-tightly inserting said nozzle delivery means of said pressure injection means of a hardening adhesive into said lower channel of said wall formwork cavity; - pressure injecting from below, by means of said pressure injection means and through said at least one lower fluid injection channel, of a quantity of hardening adhesive to fill at least said cavity of said wall formwork cavity, having the air vent through said at least one upper vent opening; - air-tightly inserting said nozzle delivery means of said pressure injection means of a hardening adhesive into said lower channel of said wall formwork cavity; - pressure injecting from below, by means of said pressure injection means and through said at least one lower fluid injection channel, of a quantity of hardening adhesive to fill at least said cavity of said wall formwork cavity, having the air vent through said at least one upper vent opening; - hardening the quantity of hardening adhesive pressure injected from below at least into said cavity of said wall formwork cavity,