Tim Carter walks you through how to use a pressure washer to clean moss, lichen and algae off your roof without damaging the shingles. Fast and easy way to make your shingles look new.  He shows you which nozzle to use for the correct pressure.  Safety is key here as the roof can be extremely slippery with the moss and water, so always spray down and away from where you are standing.  By getting all the moss off the shingles, you will extend the life of the roof.  Step by step instruction, great weekend do it yourself project. All you need is a pressure washer, a water source, electric outlet and good sturdy boots.  Save money by doing it yourself - watch and learn!