Problems with the foundation: how house got a new life

A house (9.25 m x 9.90 m), built in 2020, began showing signs of foundation fatigue after five years of use. For buildings made of aerated concrete—a material that is quite brittle and sensitive to even the slightest deformation—the appearance of cracks in load-bearing walls is a critical sign requiring immediate attention.

Reason for contacting: “Symptoms” of wall deformation

The homeowner noted the appearance of inclined and horizontal cracks on the façade and interior load-bearing walls. Since aerated concrete blocks are not very resistant to bending, even a slight settlement of a few millimeters in the foundation leads to through-and-through cracks in the masonry.

Engineering audit: The root of the problem is at a depth of 3.3 m

GEORESIN specialists conducted a comprehensive technical audit, including dynamic ground probing. The study revealed:

• The soils under the building site had different bearing capacities.
• Layers of soil with a low deformation modulus were discovered that began to “collapse” under the weight of the building after several cycles of seasonal freezing and thawing.
• The weak zones were located at considerable depth.

Technical solution: Deep Lifting injection

Based on the data obtained, a customized foundation reinforcement project was developed. The primary objective was to stabilize the soil directly within the foundation’s active pressure zone.

Progress of work:

1. Design:Calculation of the injection grid and dosage of geopolymer composition.
2. Deep Impact:Specialists reinforced the soil to a depth of3.3 mfrom the foundation base. This allowed us to “pierce” all the weak layers and create a stable support cushion under the house.
3. Mechanism of action:GeoResin geopolymer, injected under pressure, expands in the soil, filling micro-voids and compressing surrounding soil particles. As a result, loose soil is transformed into a dense composite mass.

Why was the work carried out in February?

The project’s implementation in the winter period (February 2025) was made possible by the unique properties of GeoResin geopolymers:

• The material is not affected by sub-zero temperatures and retains its properties when injected into cold soil.
• Unlike cementation, the method does not require the use of water, which could freeze.
• The building was stabilized in a short time, allowing the owner to prepare for the spring finishing season.

Results and guarantees

After completion of the active phase of work, a control geodetic survey was carried out, confirming the complete cessation of subsidence processes.

• The bearing capacity of the foundation is brought into line with the loads from the building.
• The customer received a guarantee for a period of10 yearsto prevent further subsidence of the foundation.
• The work was carried out through thin drilled holes, which made it possible to completely preserve the landscape and the house’s blind area.

Five years is a typical timeframe for foundation preparation errors to become apparent. Deep Lifting technology solved the problem with minimal effort: no excavations, no heavy equipment, and guaranteed results for a decade to come.

Has your home also started to show signs in the form of cracks in the aerated concrete block?Remember that aerated concrete does not forgive subsidence, and a small crack today can become a serious fracture tomorrow.