The Fence-All standard calls for the concrete in post holes to stop three to six inches below ground level. It occasionally provokes questions from our customers. Fortunately, it’s exactly the type of thing we’re here to clear up.
The Fence-All standard makes fences stronger. Sunlight damages concrete, and this damage is most pronounced immediately after the concrete is poured. Heat and radiation from the sun cause a premature evaporation of the moisture in the mix that weakens the binding agents in the cement.
Covering the concrete with a shallow layer of soil gives it a chance to bind properly while it cures.
Is it bad for the posts?
No. All wood products are susceptible to rot and wear. If the fence is outside–as it usually is–every exposed facet will do battle with the elements on a daily basis. The thin layer of soil above the concrete, in our long experience, doesn’t cause any addition problems in this regard.
We use Western red cedar and/or pressure treated lumber in all of our wood fences because of their rot resistant properties and their proven track record. If the natural wear and tear on wood is still a concern for you there are other options that can be explored (vinyl fences, for example).
If you have more questions about post holes or other subjects we’re happy to answer them. Call 613-736-1122 or hit the chat button on the right during business hours.