IF you do wood....make sure you use treated wood, then paint or stain, then seal it. I've replaced about half of my 120 ft, 6 ft high fence with treated 8 Ft sections, had to redig and re-align about 4 post. Previous owner DID NOT measure correctly the distance between post of 8 FT, looks like he just random eye ball and guessed distance, from what I can figure out, he built it the old school way, and with cedar board on every other side of 2 x 4, its now rotten and brittle. this last 80 ft is going to be a battle if I decided to do it, as tree roots are going to be a problem if I have to re-position the posts to the correct distance...grrrrr......