Residential House
Expansive Soil Damage Remediation

When you find large cracks appearing in your walls you know something is wrong. With suburbs expanding outwards, construction over poor soils occurs more often and may result in movement in the structure.

Residential House – Expansive Soil Damage Remediation

Fraser Thomas was engaged to investigate the cause of significant cracking in walls, gaps between floor joints, and stretching of the roof structure in the client’s house.

After carrying out geotechnical investigations, floor level surveys, and structural inspections, Fraser Thomas engineers determined that the damage was a result of ground movement caused by the seasonal shrinking and swelling of expansive clay soils.

It was decided that the most cost and time effective solution would be to carry out remedial work on the house to address the symptoms rather than the cause, i.e. provide the house structure with the ability to move without sustaining damage, instead of intensive foundation strengthening that would prevent the movement.

The remedial work involved creating a movement expansion joint across the middle of the house as a pivot point, and then to provide adequate bracing along both sides of the expansion joint.

In order to create as little impact on the house as possible, in regard to aesthetics and function, remedial bracing and expansion brackets utilised slim profiles that could either be hidden within walls, or could potentially become features themselves.

Services Provided:

  • Geotechnical Engineering
  • Structural Engineering
  • Forensic Engineering
  • Surveying


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Call us today to discuss your project

Auckland 09 278 7078

Tauranga 07 220 9277

Hawke’s Bay 06 211 2766

Christchurch 03 358 5936

Blenheim 03 428 3292

Nelson 03 222 1132