Abstract: A method of producing a vehicle's heat-insulating wall is disclosed. The vehicle's interior lining is distinguished by structure comprising an outer wall, made from steel or aluminum, layer of a rigid grid having substantially uniform pattern of openings, made for instance from an expanded metal mounted over a plurality of supports spaced across the inner surface of the outer wall, layer of self-rising heat-insulating foam deposited between the inner surface of the outer wall and the rigid grid, and a decorative layer, preferably a polyurea resin. The provided grid is sufficiently rigid for withstanding without damage forces applied to it in the process of leveling excess of the deposited foam material having solidified after it had risen up through the openings of the grid.