Fence post installation issue
I'll try to keep this short. I recently had a privacy fence installed by the builders of my house and I do not feel that they've done a good job. I think they were lazy and didn't dig a deep enough hole and then just poured a couple of bags of concrete on top and are hoping they can get away with it.
The thing is, it's pretty hard to tell if they dug deep enough without, you know, digging up the entire post. Luckily, since they only installed one section of fence, the end post is still "open" so that I can finish the job myself once the materials come in. So I grabbed a tape measure and stuck it down the opening to see how far I could go.
As you can see in the picture, I can only get the tape measure down 12 inches before I hit dirt. Is this an accurate way to measure how deep the post is buried?? Like, could the post itself still go deeper since it is hollow?
The frost line in my area is 30 inches. There's no way this is done correctly, right?