Sometimes, identifying a roof leak proofs a hard task. This is so because sometimes what we are looking as proof for leakage may collect at a distance, far away from the leakage. If you have used a plastic material in your ceiling to bar the vapor between the wall that is dry and maybe some attic insulation, it is advisable that you try to get the insulation out of your way and inspect to see if you will find any stains on the plastic. You can also check on the nails on the roof for any sign of stain. Moisture can be found condensed on the super cold nails. If you experience such a thing, it is advised that you simply clip those nails by use of a pliers.