Reblocking & Restumping in Epping, Thomastown, Lalor and Mill Park

Two generations of housing

Whittlesea grew in stages. Thomastown and Lalor filled out between the 1950s and the early 70s, largely by migrant families and first-home buyers. Housing was mostly modest weatherboard and brick veneer, often on timber stumps inside.

Epping and Mill Park followed in the 1970s and 1980s, with more brick veneer and some slab-on-ground construction. South Morang, Mernda and Doreen are mostly recent, with slab foundations dominating, but older farmhouses and early estate homes on stumps still exist.

What that means for stumps:

• Thomastown and Lalor have the highest number of houses on original timber stumps, many now well past their life.
• Epping and Mill Park have more brick veneers, which may need underpinning or internal restumping.
• South Morang, Mernda and Doreen generally need less restumping, but older houses and some early estate homes do.

Reactive clay on the plains

Most of Whittlesea west of the Plenty River sits on the basalt plains, with heavy, reactive clay over basalt. It is the same ground that affects Reservoir and Fawkner, and it moves a lot between wet and dry seasons. Long hot summers in the outer north dry the clay deeply, and houses can drop noticeably after a dry spell.

East toward the Plenty River and around Mernda and Doreen, the ground becomes more varied, with some sloping land and different soil types near the river valley.

Common issues

• Uneven floors in post-war weatherboards in Thomastown and Lalor, often with the centre of the house lower than the edges.
• Brick veneer cracking around windows and doors in Epping and Mill Park, where strip footings have moved.
• Internal floors in veneers dropping while the brick walls stay in place, leaving gaps at skirting boards.
• Garages, sleep-outs and extensions on different footings from the main house, now out of level.
• Trees close to the house, drawing moisture from clay and causing localised settlement.

Underpinning in the outer north

Brick and brick-veneer houses in Epping, Mill Park and Lalor are common candidates for underpinning. Many were built before modern soil classification and footing rules, and their footings may be shallower than today's standard. When the clay shrinks in a dry summer, one corner can drop and crack the brickwork.

Underpinning is engineered work. A structural engineer designs the repair, a building permit is lodged and the footing is excavated in short bays and filled with new concrete. We also look at drainage, trees and plumbing, because those are often the trigger.

Farmhouses and early estate homes

Before the suburbs arrived, the land around Epping, South Morang and Mernda was farms and small rural settlements. A handful of old weatherboard farmhouses and early township cottages survive among the newer streets, some of them on very old timber stumps sitting directly on clay. These houses can need a full restump, new bearers in places and careful levelling, because the floor has often been moving for many decades. The first estate homes from the 1970s and 1980s around Epping and Mill Park are now old enough for their first serious subfloor check too.

Slab homes

Most newer houses in South Morang, Mernda and Doreen are on concrete slabs rather than stumps. Slabs cannot be restumped, but they can sometimes be underpinned or stabilised if they have moved. If you have a slab home with cracking, we can inspect and tell you whether underpinning is appropriate or whether you need a structural engineer first.

Permits and council

Permit work again: a private surveyor issues it and inspects the holes. Whittlesea has few heritage overlays affecting typical suburban houses, so planning issues are rare. If a skip or materials need to sit on the road, we arrange the council permit.

Our approach

We start with a free inspection, take floor readings and look at stumps, bearers, joists and footings. Then we explain what is causing the movement and what the options are: restumping, re-levelling, underpinning or a combination. On reactive clay, we often suggest adjustable steel stumps so future adjustment is easier.

Talk to us

Uneven floors or cracking walls anywhere from Thomastown to Doreen? Give us a call and we will arrange a time to look underneath and explain the cause.