The Stumps of Weatherboard & Timber Clad Houses
These houses generally have timber stumps, and in most cases we replace them with concrete stumps.
If the underside of the house is greater than 1.5 metres, we recommend galvanised steel stumps.
How Does The Re-Stumping Process Actually Happen?
Simple — we remove your existing stumps, and replace them with reinforced concrete stumps.
Putting the House on Jacks
As the stumps are removed, and your house is set up on hydraulic jacking equipment, we ensure that sufficient jacks are setup under the sub floor framing area. This also ensures that all Occupational Health and Safety requirements are adhered to, as it creates a safe environment for us to do our work.
Inspecting the Sub Floor Frame and Replacing Timber
We inspect your sub floor frame and repair sub floor for damaged or rotten bearer joists and wall plates. If they need to be replaced, this is normally at an extra cost — it’s an unknown quantity until we actually strip your house of its baseboards.
We replace the timber with quality F17 or LVL timbers. These timbers are used because they are kiln dried or engineered, and thus avoid the problem of timber shrinkage — which causes the house to move out of level.
Removing the Stumps, Digging the Holes
Once the stumps are removed and the stump holes are all dug, we call the building surveyor to inspect the holes for the correct depth and size.
The stumps are then hung from the bearers hanging into the stump hole.
The three main types of stumps used are 75x75 Dura gal steel, the Reinforced concrete stump attached with a wire hook nailed to the side of the bearer, and the Reinforced concrete stump with a bolt protruding out the top — that one is attached by drilling a hole through the bearer and fastening it with a washer and nut on top of the bearer.
The wire-fixed stump is mostly used under walls, while the bolted or threaded stump is used under floors.
Threaded Steel Stump
Threaded Concrete Stump
Levelling the House
Prior to pouring the concrete, your house needs to be levelled.
This is done by raising or lowering the jacks carefully and evenly — which minimizes cracking.
If the house has a fireplace, it is normally the original height of the house — this is the reference point which we use as a datum, and the house is levelled out from there.
Of course, all houses are different, and there are many other factors to consider.
Pouring the Concrete
Once the house is levelled, we can then pour the concrete.
In most cases we use a concrete pump and it is pumped into the holes under and around the stump, which forms the pad on which the house is supported. Using a concrete pump, we can leave the trucks out on the street — thus avoiding damage to driveways from the weight of the trucks.
Once the concrete is set, we can then come back and remove the supporting jacks, backfill the holes, and of course — tidy the site.