Tag Archives: Unstable Soil

Concrete Deck

This house in the Launceston area, required a total of 16 underpinnings. The concrete deck at the front of the house had pulled the wall out and had dropped in all areas. The deck was removed to make the work area more accessible and helped make the job more economical. The owner intends to build a new treated pine deck at a later date. The holes were founded on hardpan material at varying depths, ranging from 800mm to 2400mm. This was the main reason for such severe movement.

Worksite Images
Showing extensive cracking of wall and remnants of old concrete deck.


Worksite Gallery
Underpinning work has been completed. Owner to build new treated pine deck at a later date.

Pier Movement

This house in the Hobart area, had a mixture of brick and timber piers that were sitting on the existing clay, without a concrete pad. We supported the existing floor and removed the sub-standard piers. We excavated and poured new concrete pads and fixed new galvanised steel piers in the concrete and to the timber bearer. Working height for this job varied from 900 mm to 300 mm.

Excavating new pier holes.


New steel piers
Work completed using new steel piers