Slab on Ground Constructions
The Australian Standard AS 3660.1-2000 Termite management Part 1: New building work
specifies that a slab on ground should be designed and constructed either in accordance
with AS 2870 or AS 3660.
Section 2: Performance Criteria
2.3.1 Concrete slabs as termite barriers
• A concrete slab or footing used as a termite barrier shall
(a) be designed and constructed so that any cracks passing through the slab or
footing do not exceed 1 mm in width through the depth of the slab;
(b) have all interfaces between the penetrations and slab or footing provided with a
termite barrier system integrated with the slab; and
(c) have all joints, except for tied footing slab construction joints, provided with a
termite barrier system integrated with the slab.
• Queensland amendment to the BCA.
• BCA amendments only apply to building classes 1 & 10
• AS2870 -2011 Residential Slabs and Footings
• Soil Classification – A, S, M, H, E, P
− Slightly reactive to Extremely reactive.
Standard Height Brick – 230mm x 110mm x 75mm
Besser Block – 390mm x 190mm x 190mm
Mortar Joint – 10mm-12mm
Render – 8mm-10mm
Bagging – Up to 3mm
‘The Inslab Water Tank’
•Inslab water tanks have been developed to cater for new houses
constructed on a concrete slab.
•They provide architects, designers and builders with a unique water
storage solution, especially where space is limited.
•Inslab water tanks conform to BCA AS2870-1996
Sub-floor ventilation is often a forgotten part of termite management.
The BCA (Vol. 2) requires the sub-floor between a suspended floor and the ground to be
AS3600 specifies ventilation to be minimum of 8,400 mm squared nett ventilation/Lm
This minimises sub-floor moisture which helps to prevent timber decay, and creates an environment
that discourages termite attack.
To be effective, acceptable sub-floor construction must:
•Be free of building debris and vegetation
•Provide cross ventilation,
•Contain no dead air spaces
•Be graded to prevent ponding and be above the external ground level
•Have evenly spaced openings