The present invention relates to a method and installation for integrally applying a relief decoration to the surface of solid elongate members. The installation comprises a pre-heater (43) with pre-heater control means (69), a press (51), and a camber measurement system (67). The pre-heater (43) is adapted for differently heating the surface of two opposing faces of an elongate member previous to feeding it to the press (51) for applying the relief decoration. The camber measurement system (67) measures possible camber of the elongate member coming out of the press (51) and generates camber measurement signals which are fed back to the pre-heater control means (69) for controlling the heating of the pre-heater (43). The aim of the installation of the present invention is to eliminate the camber of following elongate members to which a relief decoration is to be applied.