Beveridge soil, basalt and slab movement
Beveridge sits on the volcanic plain around Mount Fraser, an extinct scoria cone that rises above the surrounding basalt country. Clay soils over basalt in Melbourne's north are often reactive, swelling when wet and shrinking when dry. The site class for your lot comes from its own soil report under AS 2870, and the slab design follows that class.
Read your soil report
The classification is lot specific. Two lots in the same street can differ, especially where fill or rock is involved.
Why slab beams matter
On reactive ground the stiffness of the slab comes from its beams. Pods pushed into beams make them narrower than the design assumed.
Water is the trigger
Uneven wetting drives movement. Downpipes discharging at the slab and garden beds that hold water against one side of the house are what start it.
Signs to look for
Doors that start to bind, cracks that open and close with the seasons and floors that drift out of level. We measure these against the tolerances guide.
Slab drains
Some Beveridge engineering includes a slab drain on the boundary side to stop water migrating under the slab. We check it is there at frame.
More about Beveridge
- Building a new home in Beveridge VIC
- Buying a house in Beveridge: what to check
- How Beveridge is growing
- Building permits, council and disputes in Beveridge
- Termite risk and protection in Beveridge homes
- Common defects in Beveridge homes
- Wind, bushfire and site conditions in Beveridge
Written by our local inspection team from work carried out in Beveridge. Licensed building practitioners, Building & Plumbing Commission registration CDB-U 53425.
