Apart from keeping toddlers and dogs in or out, what a fence mainly does is cost a lot of money. A stockade-style vertical fence is slightly cheaper at $15 to 20 per square foot, versus $15 to 22 ...

There are quite a few options for board fences. ... The strength of any fence comes from the vertical posts that support it. Most people use pressure-treated 4x4 posts spaced 8 feet apart.