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Restumping - What does it involve?

Updated: Jun 1

One of the processes of building a foundation involves placing concrete, wooden or steel posts or stumps in the soil beneath the foundation. Holes are dug and these posts are placed deep into subsoils with a large footprint below to decrease movement.

With time the soil beneath the foundation settles. When this happens, the posts which are also referred to as stumps may move. The ground develops cracks and the entire house may be at risk of being unstable. Wooden stumps can also rot after being in the soil for a while thus resulting in the need for restumping.

So how is the process done? For wooden posts or stumps, a hole is dug next to the post. This hole is tiny about six inches wide. This will provide room for the contractors to check whether the post has rotted. If this is the case, the foundation is supported by jacks.. The posts are then replaced if the damage is extensive. To know whether the posts have rotted away, the contractor can pierce the wood to see if it will give in or jack the house up packing up to height and letting weight back on the stump to check for sinking If it does, it is an indication that it needs replacement.

For concrete stumps, the signs of damage is splitting concrete due to moisture penetrating the concrete and rusting the rio bar causing concrete to fail. If you know what to look for though, you will see the signs are the same as any other type of footings.

Naturally, stumps made from steel last longer because wood rots quickly especially in wet soils and concrete can deteriorate due to concrete being semi permeable. It is therefore advisable to choose steel stumps for your foundation for most applications due to its high integrity, looks, longevity and practicality.


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