Fence Post Frost Line

When building a fence it s important to think about the frost line which is the deepest point in the ground where water will freeze.

Fence post frost line.

But the frost line may be different depending on the climate you live in. It seems like frost wouldn t push up a post if it the post extended below the frost line. Also where frost only penetrates the soil an inch or two there is no need to be concerned about frost heaves such as on the west coast and the southern most parts of the u s. Despite what some people believe making a long lasting fence is not always as simple as sinking a post in the ground and moving on to the next post.

Consider the frost line in your area. C to keep frost from bonding to the sides and jacking up the footing. Facebook 0 twitter 2 linkedin 0 pinterest 4 email 4 print 24. Watch the frost line.

Even if you put the footing down to the frost line frost can still grab the side of the post or footing and push it up. Frost heave prevention for fence posts. However where freezing goes deeply into soil your fence posts and the footings of your deck are subject to this upward pressure. The process is then repeated next winter raising your fencing a bit further.

Dirt then slips in beneath the concrete. Fence post depth size and anchoring systems can make or break your fence line. Generally a hole that is at least 1 3 the depth of the fence will keep the fence from heaving when the ground freezes. This is where.

Frost heave is a condition that happens when water freezes in the soil and then the soil thaws out. The frost line also called frost depth varies from region to region. Typically in part to ensure that posts lodge below the frost line experts call for a hole deep enough to submerge the bottom third of the post below ground. The resulting pressure literally heaves the fence posts out of the ground over time.

I am not too concerned about concrete providing lateral support for the fence above ground because of the posts depth and 5ft spacing. Your fencing is raised as a result. The trouble begins when frost starts to heave your concrete upward using the tops of those v shaped concrete footings to grip them since the tops form a lip. The best way to prevent frost heave in fence posts is to set them on a drainage bed prior to pouring the concrete.

For a six foot tall post therefore.