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Structure re-levelling

Why is the re-levelling of structures required?

Uneven buildings are the result of weak ground that causes subsidence – the gradual downward movement of a building or structure due to changes in soil conditions.

There are many different causes of subsidence, including

  • Extreme weather conditions that cause the moisture content in the soil to contract or expand
  • Nearby excavations that cause the ground to vibrate
  • Poorly compacted soil during the construction of the building
  • Incomplete or inadequate foundations or footings

Subsidence can happen over large areas of land or in one small area. It can occur over a lengthy period or be an immediate reaction to nearby activity or natural events such as earthquakes or flooding.

When the ground has been affected by subsidence, building foundations are no longer correctly supported, resulting in unexpected structural damage, such as sinking floors and cracks in the building walls, which can all seriously impact the operations and safety of the building.

When is structure re-levelling needed?

The sinking of the ground can result in a building or structure also sinking. The structure being out of level can put stress on and compromise structural members, resulting in serious structural and interior damage.

Here are some of the conditions that can cause subsidence and unlevelled structure:

  • Increased groundwater content
  • Drought drying out the soil
  • Washaways from broken pipes
  • Poorly compacted fill
  • Liquid, gas or mineral resources being removed from the ground
  • Adjacent excavation
  • Heavy loading
  • Deterioration of retaining walls
  • Earthquakes and seismic activity
  • Tree roots removing moisture from the ground
  • Vibrations caused by heavy road traffic or machinery
  • Absence of an organised footing system – in very old buildings or buildings with additions or alterations

The best way to fix sinking concrete floors or slabs is to raise and re-level the foundations to re-support the building or structure. Traditionally, underpinning, piling and mechanical jacking were used, but these methods are time-consuming and messy, involving excavating or digging up parts of the foundation.

Modern level correction methods such as resin injection and computer-controlled grouting provide a quicker and more cost-effective way to lift and re-level an existing building or structure.

Structure re-levelling solutions

Find out more about structure re-levelling solutions

Slab lifting

Sunken or unlevel slabs and hardstand surfaces in warehouses or logistics environments can be a sign of foundation ground subsidence. Mainmark’s slab lifting techniques are non-invasive, quick and cost-effective.

Find out more about slab lifting

Building re-levelling

Uneven buildings are the result of weak ground that causes subsidence – the gradual downward movement of a building or structure due to changes in soil conditions. Mainmark’s modern level correction methods are a quick and cost-effective method for re-levelling an existing building,

Learn more

Structure re-levelling with minimal disruption

Mainmark’s structure re-levelling and level correction technologies are time-efficient, cost-effective and reliable alternatives to traditional methods such as piling or underpinning.

Our techniques minimise disruption; we offer flexible scheduling and our methods can be used on sites with restricted access.

Because of the non-invasive nature of our re-levelling technologies, it’s not necessary for building occupants to vacate the property and building contents, including plant and machinery, can remain in place.

Treated roads, driveways, pathways, concrete slabs and other infrastructure are trafficable immediately.

Mainmark structure re-levelling technologies

Teretek® – re-levelling with resin injection

Teretek® resin injection technology can improve the ground beneath existing structures and gently bring them back to level. We drill 16mm holes through the ground-bearing slabs or beneath the foundations into the deteriorated sil strata underneath. These holes are then used to inject our specialist resin formula, filling cracks and voids, compacting the ground and restoring the structure to its correct level.

JOG Computer-Controlled Grouting for re-levelling

JOG Computer-Controlled grouting uses a high-mobility cementitious mix. This mix is pumped into multiple injection depths during a meticulously monitored process that deploys laser sensors and computers. This is a precise method for consolidating weak ground and lifting and re-levelling structures. It delivers specific, engineered ground improvement outcomes, regardless of how complex the project is.

Why Choose Mainmark?

Delivering exceptional outcomes to our
clients, partners and team


Our world-leading ground engineering technologies achieve safe, accurate and economically delivered outcomes. We understand that ground engineering can be complex and no single method suits every project. We work with our clients and partners to recommend the right solution for each challenge.


Mainmark ground improvement solutions have been proven for over 30 years. Our ground engineering specialists have worked on over 30,000 projects worldwide, from straightforward residential subsidence to post-earthquake remediation in Japan and New Zealand. We aim to be the best at solving your ground problems with minimal disruption.


Our experienced team has a wealth of knowledge in residential, commercial and industrial buildings, as well as highways, rail, utilities and infrastructure. Our ground engineers can raise and re-level buildings, providing support and improving ground performance.


The combination of our proven ground improvement technologies and our experienced ground engineers enables us to re-level and re-support buildings affected by subsidence across various sectors.


Our problem-solving approach and recommendation of ground engineering solutions sets us apart from the competition. The complexity of ground improvement requires a range of state-of-the-art technologies to meet both project and client requirements.


We are trusted to present effective and creative solutions to many types of ground engineering problems in a wide range of sectors, including residential, industrial, commercial, civil engineering and infrastructure.

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Mainmark Ground Engineering (UK) Ltd.

CRN: 09372443

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