I would strongly advise using Sikkens stains, costs a bit more, a 2-coat system, but will give superior finish and durability, especially on south and western sides, where you will need more attention....usually 7-9 years, then a light power wash and a maintenance re-coat. See a paint dealer that sells Sikkens products before you decide. Unless your siding is badly discolored, do NOT use a solid color latex stain. Remember, the PREP work is the most important, power wash and caulk first.