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.
Details of continuous, in-situ, reinforced concrete perimeter foundation walls. Read more.
Details of precast concrete piles. Read more.
Details of subfloor framing. Read more.
Details of concrete slab floor construction. Read more.