Putting up a cedar fence in Spokane with a 4-foot post depth

Everyone around here says to go 3 feet down for frost line. I went a full foot deeper on a job last fall, thinking it would be rock solid. The ground froze so hard it actually pushed two posts up and out of plumb by spring. I learned that sometimes going deeper can make the ground grip the post and lift it. Has anyone else seen this happen with extra deep holes in a cold snap?

3 comments

3 Comments

skylerbell7d ago

Reminds me of what @rosek44 said, how trying too hard to fix something often makes it worse in other ways.

rosek4423d ago

Wow, that's frost heave for you, deeper can definitely backfire.

taylorlewis23d ago

Classic @rosek44, nature's way of saying your good idea was actually terrible.