I have seen the DIY shows on TV advocating the use of gravel to sink treated wood fence posts for years, yet the majority of contractors who do this work still use concrete.
I am building a 6' tall pressure treated wood fence. The holes will be 9" diameter, 42" deep (I live in Alberta, Canada) drilled by a tractor, and the posts will be 4x4x10' pressure treated. The contractor doing the drilling is also bidding to sink the posts in 2 bags concrete/hole.
I am considering sinking the posts myself by just filling around the post with gravel up to the top. I will save myself a lot of cost, effort, and the TV shows say the fence lasts longer because water is not held in contact to the wood.
I would appreciate any opinions on this. Will the fence be soft? Will the gravel withstand frost heaves? Thanks.
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