February 27 2015 0comment

What is Foundation Underpinning?

Foundation underpinning is a process that targets foundations which have been weakened over time.  Underpinning is necessary as the foundation needs to be repaired or reinforced.  Here at BMC Microfine, our process is straightforward – rather than using methods such as contiguous piling or shore piling, we inject straight into the soil under the existing foundation.  Once the grout has been injected, the grout blocks will stop any sinking and subsidence to ensure no further damage is caused.

When Is Underpinning Necessary

We find that the majority of houses and structures that require our underpinning services are typically because there is weak or unstable soil which has caused the foundation to become unstable.  Soil can become unstable due to a number of reasons but the most common are when changes to the structure have been made which compromise the foundation, severe weather or simply natural ‘wear and tear’.  One of the telltale signs of a house requiring foundation underpinning is when cracks appear along the walls.

Other Reasons For Foundation Underpinning

In addition to soil instability, foundation underpinning may be necessary for a number of reasons:

  • The original foundation is not strong enough – Can be due to decay of old wooden piles under the foundation.
  • The purpose of the structure has changed and the foundation is no longer suitable.
  • The properties of the soil under the foundation could have changed
  • The construction of structures close by makes it necessary to excavate the supporting soil

How Much Does It Cost?

Here at BMC Microfine, we specialise in providing the most appropriate advice to our clients to ensure their project is a success.  The cost of underpinning can vary depending on a variety of factors so to get a better idea of price, feel free to give us a call on 08 9303 9297 to discuss more.