Houses of this era typically had timber floors supported by piles and perimeter walls. Some architect-designed homes had in-ground concrete slabs.
Most houses built in the 1940s-60s featured a timber floor, supported either by a continuous reinforced concrete perimeter wall and precast concrete piles or by piles without foundation walls.
Other variations included cast in situ concrete corners with the remaining support provided by piles, or – for sloping sites – jackframing on concrete piles and a continuous foundation wall.
Some architect-designed houses of the late 1960s used concrete slab foundations.
Where piles were used, either with or without a perimeter wall, the minimum ground clearance was typically more than 600 mm, which allowed for good subfloor ventilation and provided easy subfloor access.
The combinations of ample ground clearance, good ventilation and (early in the period) the use of durable native timber for bearers and joists, means that the subfloor framing of many houses from this period is still generally in sound condition.
Details of original piles and continuous, in-situ, reinforced concrete perimeter foundation walls. Read more.
Details of concrete slab floor construction. Read more.