Slab on ground: residential construction guide
Australian residential slab on ground construction: AS 2870, NCC 2022 hold points, site classification, and step-by-step sequence.
Ask Chalkline about this →The full how-to guide for slab on ground construction is at Slab on ground construction: residential build sequence.
That article covers the complete process: soil report and site classification (AS 2870:2011 Class A through P), engineering drawings, compaction, services rough-in, termite management, formwork and reinforcement, vapour barrier, the mandatory pre-pour hold point, concrete placement, and tolerances.
What you will find there
- Site classification table: Class A, S, M, H1, H2, E, P with typical movement ranges
- Slab types: stiffened raft vs waffle pod, when each applies
- Hold points: pre-pour inspection, termite certificate, certifier sign-off
- Tolerances: concrete cover, slab edge exposure zone, floor flatness
- Common problems: missed pre-pour hold points, reo chair failures, vapour barrier tears, cold joints
- Documents required: geotech report, structural drawings, Construction Certificate, pest manager certificate
Quick reference
| Item | Standard | Key requirement |
|---|---|---|
| Slab design | AS 2870:2011 | Soil report and site class drive every dimension |
| Concrete strength | NCC 2022 HP 4.2 | N20 minimum at 28 days |
| Vapour barrier | NCC 2022 HP 4.2.8 | 0.2 mm PE film, 200 mm laps, taped at all joints |
| Termite management | AS 3660.1:2014 | Pre-pour certificate required; 75 mm exposed slab edge post-build |
| Pre-pour inspection | Construction Certificate | Mandatory hold point; no pour without certifier sign-off |
See the full article: Slab on ground construction: residential build sequence.
References
Last updated: 2026-05-10.