The invention relates to a multilayer thermal insulation panel for construction (100) and manufacturing method thereof. Such panel comprises: —a main layer (1) in thermally insulating material which comprises a first surface (10) and a second surface (20); —a first backing layer (2) of the main layer connected to the main layer along the first surface (10); a second backing layer (5) of the main layer connected to the main layer along the second surface (20). At least one of such first (2) and second (5) backing layers comprises: —a reinforcement layer (3) in fibrous material, a fire-resistant (4) and thermally insulating layer, —a cladding layer (6) of the reinforcement layer (3); —a binding layer (7) positioned on a surface (8) of the fire-resistant layer (4) in such a way that the fire-resistant layer is sandwiched between the cladding layer (6) and the binding layer. The panel is characterised in that the binding layer (7) is manufactured by means of. a spray-applied aqueous solution of sodium silicates on the surface (8) of the fire-resistant layer (4).