Sukkah

[forestofglory]

So I've decided to build a Sukkah(*) this year. I've never done this before -- but it should be exciting and fun. If you happen to have advice that would be helpful. The internet says a sukkah should have two and half walls -- what counts as half a wall? If I use an existing structure for the bottom half of the wall does that count? (I'm thinking of using the porch railing.)


(*)Generally translated as booth, a Sukkah is a structure in which one traditionally dwells during Sukkot, which start the 22 at sundown