I am planning to event a fence this summer and, given the size of ~ 250 linear feet, am looking for the cheapest option for cementing the poles. I am considering the use of metal Postmaster (MasterHalco) posts and plan to set them 4' in the ground in ~ 8' holes as I am up north and the frost line is ~3.5 feet.
I have checked out multiple types of fast dry concrete specifically designed for fence post but would like to find a cheaper option. Is a standard portland concrete mix acceptable for this application? If Yes, what ratios of cement/sand/gravel should be used?
Also, are sonotubes recommended?
Thanks
Best Answer
If you are going that deep in the ground, your fence posts will be plenty stable by placing and packing the dirt back around them. To pack the dirt I use a 2X4 with the end cut down to size and rounded for a better feel as a handle, and for tighter places I use a 1X4. I would only do concrete around them if you are setting a large gate to a post.
If you must use portland, instead of the just add water type, the mix ratio is 1-2-3. 1 shovel portland, 2 shovels sand, 3 shovels gravel.