House Re-levelling in Melbourne — Bring Your Floors Back to Level

When re-levelling is the right fix

Re-levelling suits houses where the floor has moved but the stumps themselves are still doing their job. That usually means one or more of the following:

• Packing has crushed or rotted between the stump tops and the bearers, so the floor has dropped a little in places.
• The house has moved with the seasons on reactive clay and has not come back to where it started.
• A previous restump has settled unevenly, or was never packed accurately.
• A renovation is coming and the floor needs to be flat before new timber, tiles or vinyl are laid.
• Doors and windows have started binding, but the stumps test sound and are not leaning or crumbling.

If the stumps are rotten, broken or sinking, re-levelling on its own will not hold. That is a restumping job, and we will say so plainly.

Measuring before we move anything

Floors can feel uneven while being only a few millimetres out, and they can look fine while being well out of level across the length of the house. Guesswork does not help, so we measure. Level readings are taken in a grid across each room and along the main bearer lines. The readings show where the house has dropped, how far, and whether the pattern points to a single problem area or general settlement.

We then go under the floor to check the stumps, bearers and joists. This step decides whether re-levelling is realistic. A house with sound stumps and tired packing is a good candidate. A house with stumps that have sunk unevenly into soft clay may need some of them replaced first.

How a re-level is carried out

Once the readings and subfloor check are done, the work generally follows this pattern:

• Jacks are placed under the bearers at the low points.
• The floor is lifted gradually, a little at a time, so the frame and plaster have a chance to adjust.
• Old packing is removed and replaced with new, durable packers sized to suit.
• Adjustable steel stumps, where fitted, are wound to the correct height.
• Fresh readings confirm the floor has come back within an acceptable tolerance.

Lifting a house too fast is the quickest way to crack plaster, so the pace is deliberately steady. Even with care, some older cracks may show again as the house moves, and patching after the job is normal.

Melbourne conditions that push floors out of level

Melbourne's reactive clay is the biggest single driver. In the northern suburbs, around Preston and Reservoir, and through much of the south-east, clay soils swell after heavy rain and shrink back during long dry spells. A house that rides out that cycle every year will gradually drift, especially where one side of the building stays damper than the other because of a leaking pipe, a garden bed against the wall or a downpipe that empties close to the footings.

Trees play a part as well. Large gums, elms and other thirsty trees draw moisture out of clay, which can cause one section of a house to drop while the rest stays put. Homes on sloping blocks in the foothills around Upwey, Boronia and Ferntree Gully face a different challenge: water moving downhill through the subfloor, softening the ground under the lower stumps.

Keeping the floor level afterwards

A re-level works best when the cause of the movement is addressed too. Common fixes include:

• Redirecting downpipes and stormwater away from the house so water does not pond beside or under it.
• Repairing leaking pipes in the subfloor, which can soften clay over months without anyone noticing.
• Improving subfloor ventilation so the ground and timbers stay drier.
• Keeping garden beds and irrigation away from the base of external walls.

We point out anything we see under the house that is likely to undo the work, so you can deal with it at the same time.

Re-levelling versus restumping

The two jobs are related but not interchangeable. Re-levelling corrects the floor height while keeping the existing stumps. Restumping replaces the stumps themselves. If your stumps are sound, re-levelling is usually the quicker and smaller job. If they are failing, a re-level only postpones the problem, and the floor will drop again. The inspection settles which one your house needs.

Getting a real figure

The scope of a re-level depends on how far out the floor is, how many points need lifting, access under the house and whether any stumps or packing need replacing. An on-site inspection gives a real figure and a clear explanation of what the job involves.