What’s the difference between restumping, reblocking and underpinning?

by | Jun 3, 2021 | Alan Family Homes | 0 comments

Reblocking, restumping, and underpinning are related to the foundations on which the structure of a house rests. The terms mean that the process of replacements and repair of wooden or concrete stumps that support the structure. Although both of the three processes are about the foundations of the house, they surely are not the same.<


These two terms can be interchanged while referring to the replacement of foundation stumps. The reason being that both processes have a similar approach. If the concrete or wooden stumps underneath a house about to start a crack, contractors replace the old stumps with new ones. Restumping or reblocking include placing jacks to support the floor as dugging out and removing the worn out foundation. Once the cracked stumps are removed from the base, new concrete stumps are inserted in its place. This process may cause minor damage to the floors and the walls of the house. Our contractors perfectly fix these damages after the new foundation has been laid below the house.


This process is used exclusively for homes in Melbourne that have walls of brick veneer and a foundation of concrete slabs. Over the time, the weather conditions and ground elements cause the slabs to crack and sink in certain places or certain spots. When this happens, the brick veneer losses its tight alignment, leading to structural instability. The underpinning process uses jacks to prop up the cracked and slumped slabs, while a new coat of concrete is poured around the jacks. This stabilises the brick alignment and in this way, adds more stability to the building.

The Difference The biggest difference between the three processes is that while restumping or reblocking the foundation stumps are totally replaced, but in underpinning, the concrete slabs are not replaced, they are just reinforced with a new product.