Foundations: original details

Houses of this era typically had suspended floors supported by piles and a perimeter wall, or a concrete floor slab, or a combination of both.

Floor construction in 1970s homes could consist of:

  • a suspended timber floor supported on precast concrete piles with a continuous in-situ perimeter foundation wall (Figure 1)
  • a suspended timber floor supported on concrete piles with a continuous perimeter concrete masonry foundation wall (Figure 2)
  • a fully piled foundation systems with jack framing and asbestos-cement flat sheet (with ventilators or concealed ventilation where floor framing cantilevered past the line of the foundation wall) or base boards fixed to the jack framing
  • an in-situ reinforced concrete floor slab (later in the period).

Instead of having very high foundation walls and piles on sloping sites, foundation walls were often extended with jack-framing (Figure 3), or a concrete masonry foundation wall was constructed.

Single level houses with attached garages often had a suspended timber floor to the house with a slab on ground to the garage space. Garages in split-level houses also typically had a concrete slab to the garage area and suspended floor construction to the rest of the dwelling.

Foundation walls

Details of continuous, in-situ, reinforced concrete perimeter foundation walls. Read more.

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Details of precast concrete piles. Read more.

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Subfloor framing

Details of subfloor framing. Read more.

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Concrete slab floor construction

Details of concrete slab floor construction. Read more.