A detailed study of the mechanism of growth of polyvinylchloride (PVC) thin films and of the DC conduction in these films, is presented. Films of PVC were grown by the isothermal immersion of glass and aluminium substrates into dilute solutions of PVC in a mixture containing 80% benzene and 20% acetone (B+A) and cyclohexanone solvents. The dependence of the growth of the films on the concentration of the solution, nature of the solvent, immersion time of the substrates and temperature of the solution was studied. The initial growth of the films in all cases occurs at a rapid rate which quickly decreases to yield uniform, structurally reproducible and pinhole-free films with insignificant aging effects. The DC electrical conduction in PVC films sandwiched between planar aluminium electrodes was examined in a temperature range -20 to +200 degrees C, with applied electric fields ranging from 4.5*10⁵ to 1.5*10⁷ V cm^-1. The effect of iodine doping on DC conductivity was also investigated. Iodine doping resulted in increased conduction. The activation energy for conduction decreased from 0.60 to 0.49 eV above T_g for an iodine concentration of 0.4 g/100 ml of PVC solution. The T_g of PVC layers moved towards higher temperatures with increasing iodine content.