Timber stumps are the silent load-bearers under a large part of Wagga’s housing stock, and they fail gradually enough that many homeowners don’t notice until the signs are hard to ignore. The signs your house needs restumping tend to cluster together: rarely does just one thing go wrong. If you are seeing two or more of the indicators below, our restumping and reblocking service and a foundation inspection are the right next steps.
Quick visual signs above the floor
You do not need to go under the house to spot early stump deterioration. The first signs usually show up as changes in the way the house feels and functions:
Sloping or uneven floors: Walk across the room and pay attention to whether the floor tilts toward one corner or sags in the middle. A marble rolled on the floor will find the low point. Our uneven and sloping floors guide explains how to measure the gradient properly.
Bouncy or springy floors: Stump deterioration often shows up as deflection, the floor gives slightly underfoot, or moves noticeably when you walk across it. This is different from the solid feel of a floor on sound bearers.
Sticking doors and windows: As stumps drop or lean, the house frame distorts and door frames go out of square. Doors that once swung freely start to stick at the top or bottom corner.
Gaps at skirting boards: Where the floor has dropped, gaps appear between the skirting board and the floor surface. A uniform gap around the whole room can be seasonal timber movement; a gap that is wide at one end and closes at the other suggests the floor has tilted.
Cracks above door frames or along cornices: Similar to footing settlement, stump deterioration causes frame distortion that shows up as diagonal cracks radiating from the corners of door frames or running along the line where the wall meets the ceiling.
Visible lean in the house or deck: Stand at the corner of the building and sight along the wall. Lean in the wall, a visible tilt to the veranda, or a deck that has dropped away from the main house are all worth investigating.
What to look for underneath (if it’s safe)
A sub-floor inspection can confirm stump deterioration directly. Safety note: only enter the sub-floor space if it is safe to do so. Check for animal nesting, debris, low clearance, and ensure you have adequate light and ventilation before crawling under a house. If in doubt, leave the sub-floor inspection to a professional.
If you can inspect safely, look for:
Rotten or soft timber: Press a screwdriver or pocket knife against the stump material. Timber that has rotted will be soft and crumble; you may be able to push the blade into it easily. Pay particular attention to the ground line, where the stump meets the soil, this is where rot typically starts.
Termite damage: Timber stumps in the Riverina are at risk of termite attack. Look for mud tubes running up the stump face, hollow-sounding timber when tapped, or frass (termite droppings) around the base. Termite damage and rot can occur simultaneously, accelerating stump failure.
Stumps leaning or tilting: A stump should be vertical. Any lean or lean to one side indicates the stump has moved, which means the floor load is no longer being transferred straight down to the ground.
Missing or detached stumps: In older houses, stumps can completely detach from the bearers above them if the connecting cap plate rots through. The bearer may be resting on nothing for a short section without the defect being obvious from above.
Damp sub-floor: Excessive moisture in the sub-floor space accelerates both rot and termite activity. If the ground below the floor is consistently wet, or there is condensation on the under-side of the floor, the ventilation system is not adequate.
Termite risk on old timber stumps in the Riverina
The Wagga Wagga region carries a meaningful termite risk for older timber substructures. Timber stumps in older homes, particularly fibro and weatherboard homes in suburbs like Turvey Park, North Wagga and Ashmont, are typically several decades old. Original timber stumps from the 1940s, 1960s may have had reasonable service life to begin with, but combination of reactive-clay soil movement, moisture cycling, and termite pressure in the Riverina environment has taken a toll on many of them.
If you find termite damage in your sub-floor, this is a matter for a licensed timber pest inspector as well as a foundation specialist. Our concrete vs timber stumps guide explains why replacement with concrete stumps eliminates the termite and rot vulnerability entirely.
Age of house as a rough guide
Original timber stumps were installed to last approximately 25-50 years depending on the timber species, treatment at the time, and ground conditions. Many older Wagga homes already well exceed that original service life. Use the construction decade as a rough risk indicator:
| Construction decade | Original stump age | General risk level |
|---|---|---|
| 1920s, 1940s | 80-100+ years | High: most stumps should have been replaced by now |
| 1950s, 1960s | 60-75 years | High to moderate: original stumps likely at or past end of life |
| 1970s, 1980s | 45-55 years | Moderate: inspect regularly; some will need attention |
| 1990s, 2000s | 25-35 years | Lower but worth inspecting, especially in reactive-clay areas |
This is a generalisation. Some 1940s stumps are still sound; some 1990s stumps have failed due to termite damage or poor drainage. Age is a prompt to inspect, not a guarantee of condition.
When the whole house needs it vs part-restump
Not every deteriorated stump means a full re-stump. Understanding which sections need work requires a professional assessment, but some general patterns emerge:
Part-restump: Where deterioration is localised, a handful of stumps under a bedroom or a corner of the house, a partial restump addresses just those stumps. This is more economical and less disruptive than a full job. It makes sense when the remaining stumps are in good condition and likely to have several more years of life.
Full restump: When most stumps are showing similar deterioration, a full restump is often more cost-effective than repeated partial jobs over the coming years. There is also a case for a full restump when the house needs re-levelling: doing both together in one mobilisation saves on contractor visit costs.
Our restumping vs underpinning guide helps clarify which approach applies to your situation. For how long the job takes, a partial restump on a typical Wagga home is usually one to three days; a full re-stump takes longer depending on stump count and access.
What to do next
If you have spotted two or more of the signs above, the practical next step is a professional sub-floor and foundation inspection. Our foundation inspections process covers both the visual evidence above the floor and a direct assessment under the house. The result is a clear picture of which stumps need replacing, whether any re-levelling is needed, and whether a house relevelling service should be combined with the restumping.
Do not leave a failing stump situation unaddressed for too long. Once a stump drops or leans significantly, the frame distortion gets worse each year and secondary cracking can develop around windows and door openings. The repair scope grows, and the cost grows with it.
FAQs
Can I check my stumps myself without going under the house?
Yes, partially. The above-floor signs, sloping floors, sticking doors, bouncy floors, gaps at skirting boards, give you a good initial picture without needing to go under. For a definitive assessment you need a sub-floor inspection, either by entering yourself (safely) or by having a professional do it.
What is the difference between restumping and underpinning?
Restumping (or reblocking) replaces the stumps under a suspended timber-floor house. Underpinning repairs or extends the concrete or masonry footings under a slab-on-ground or brick-on-footing house. Different house types need different treatments. Our restumping vs underpinning guide explains the distinction clearly.
How much does restumping cost in Wagga?
Cost depends heavily on stump count, material choice (concrete vs adjustable steel), access conditions and whether re-levelling is included. A partial restump of six to ten stumps typically falls in a different range to a full re-stump of sixty-plus. Get a professional inspection and itemised quote for your specific house. Our foundation inspections service can provide that assessment.
Can I just jack the floor up myself and pack the stumps?
Packing stumps without a professional assessment is not recommended. Jacking a floor applies loads to adjacent structural members that may not be designed for that stress. Done incorrectly, it can cause cracking elsewhere in the building. Sub-floor work on a family home should be carried out by a licensed contractor.
Will restumping fix my sloping floor?
Restumping combined with re-levelling usually improves floor slope significantly, but does not always return a floor to perfectly flat, particularly in older homes where the frame itself has experienced some permanent distortion. Your inspector will be able to give you an honest expectation of how much improvement is achievable.