Cornice Material Comparison
The benefits of using a lightweight alternative in volume building is beyond a simple material cost saving. There are substantial efficiencies in the installation and finishing process.
Easier handling and installation, quicker curing and drying times, lower defect ratio and lower waste are all factors that combine to create faster and cost-effective outcomes without compromising on finish quality.
The below table offers estimated comparison values sourced from a range of datapoints across the web. Note that these comparisons are to be considered high-level guidance, as various factors contribute to outcomes in different markets.
Foam vs Plaster Cornice Material Comparison Table
| Criteria | DS4 Decor XPS Cornice | Plaster Cornice |
|---|---|---|
| Installation Time | 2–3 LM/hour | 1–1.5 LM/hour |
| Crew Requirements | 1 finisher + 1 labourer (can be installed by single person) | Skilled plasterer + apprentice |
| Cure Time / Rework | None, paint-ready in <1 day | 24–72 hrs drying + sanding |
| Finish Quality | Good (with minor caulking) to Excellent (with lightweight filler finishing) | Excellent (seamless) |
| Durability | Greater moisture resitance & movement tollerance | Greater impact resistance |
| Waste Factor | ~5–7% (Offcuts) | ~10–15% (Offcuts, Wet Mix) |
| Labour Availability | Easier to staff (Semi-skilled & non-plastering trades OK) | Dependent on skilled wet finishers |
| Damage During Install | Brittle (can chip) but light & easy to handle | Fragile and heavy — breakage risk |
| Defect Liability | Easy to patch with lightweight filler | Harder to blend repairs post-installation |
| Environmental | Lower embodied energy Made from recycled material Waste fully recycleable | High energy input (cement, lime), recyclable |
| Typical Install Time (80 – 100LM Home) | Install: 1-2 Days Drying / Cure : > 1 Day Defects / Rework : Low | Install: 3-5 Days Drying / Cure : > 2-3 Days Defects / Rework : Med-High |
Sources
- Rawlinsons Australian Construction Handbook (2024 Edition) – rawlhouse.com
- Cordell Construction Cost Guide – CoreLogic – corelogic.com.au
- CSR Gyprock Installation Manuals – gyprock.com.au
- Knauf/Boral Cornice Systems – knaufapac.com
- Buildxact and Cubit Estimating Software – buildxact.com / buildsoft.com.au
- Field Data from Australian Volume Builders (Metricon, Henley, Simonds, GJ Gardner)
- Trade Forums – plasterersforum.com and contractortalk.com