  We report a detailed account of the phase diagram of a recently introduced
model for non-equilibrium wetting in 1+1 dimensions [Phys. Rev. Lett. 79, 2710
(1997)]. A mean field approximation is shown to reproduce the main features of
the phase diagram, while providing indications for the behaviour of the wetting
transition in higher dimensions. The mean field phase diagram is found to
exhibit an extra transition line which does not exist in 1+1 dimensions. The
line separates a phase in which the interface height distribution decays
exponentially at large heights, from a superexponentially decaying phase.
Implications to wetting in dimensions higher than 1+1 are discussed.
