Panel · 90–265 mm
Panelised — indicative fig. C·28
Fire Combustible CombustibleEmbodied carbon Data pending Per-m² sourceCompressive 70-170 kPaMPa StructuralDesign life 60yr
OSB-faced EPS SIPs provide continuous insulation with whole-wall R?values roughly R?13 to R?40 (EPS core). Typical EPS density in panels is ~0.90 lb/ft? (~14 kg/m?).
01 Physical
Density EPS core ~0.90 lb/ft? (?14 kg/m?) per WBDGkg/m³
Specific gravity 0.025-0.040
Porosity 98% (EPS core)%
Water absorption <2% by volume (OSB), <4% (EPS)%
Hardness 35-40 (Shore D)
UV resistance Requires protection
Chemical resistance Resistant to dilute acids/alkalis
pH tolerance pH 3-11
Surface roughness Ra 50-100 μmµm
02 Mechanical
Tensile strength 140-200 kPaMPa
Compressive strength 70-170 kPaMPa
Flexural strength 20-30 MPaMPa
Shear strength 1.0-1.4 MPaMPa
Poisson's ratio 0.3
Impact resistance High
Creep resistance Good
03 Thermal
Thermal conductivity 0.033-0.037 W/mK (system)W/m·K
Specific heat 1.3-1.5 kJ/kg·KJ/kg·K
Thermal expansion 5-7 x 10⁻⁵ /°C×10⁻⁶/°C
04 Compliance & Fire First question
Combustibility class Combustible
Fire resistance level FRL 60/60/60 to 90/90/90
Ignition temp 200-260°C°C
Flame spread index 75-200
Smoke dev. index 50-150
05 Sustainability & Health
Embodied carbon 8-12 kg CO₂e/m²
Carbon footprint 15-25 kg CO₂e/m²
Embodied energy 150-200 MJ/m²MJ/kg
Water footprint 50-80 L/m²L/kg
Recyclability 100%%
Recycled content 0-10%%
Renewable content 45-50%%
VOC emissions <0.01 ppm formaldehyde
Toxicity rating Low
LEED contribution Up to 47 points
06 Durability · Cost · Logistics
Expected lifespan 60+ years
Maintenance interval Annual inspection
Warranty period 10-25 years
Material cost (range) AUD $280-550
Material cost (per unit) AUD $15-20/m²
Lead time 2-6 weeks
Lifecycle cost AUD $200-250/m²
Annual maintenance AUD $0.50-1.00/m²
Market availability Readily available
07 Assessment
Advantages
- Rapid construction (50-55% faster than traditional framing)
- Superior thermal performance (whole-wall R-value)
- Excellent airtightness (90% less air leakage than stick frame)
- Reduced on-site waste (up to 30% less than conventional)
- Factory quality control and precision
- Integrated structure and insulation
- Reduced labour requirements
- Predictable performance across climate zones
- Long service life (60+ years expected)
- Compatible with various cladding systems
Constraints
- Higher upfront material cost than traditional framing
- Requires experienced installers familiar with SIP construction
- Moisture vulnerability if not properly sealed and maintained
- Limited modification flexibility once installed
- Electrical and plumbing routes must be pre-planned
- Requires crane or mechanical handling for larger panels
- OSB susceptible to moisture damage if exposed
- Thermal mass limitations compared to masonry
- Fire rating requires additional protective linings
- Size limitations for transportation to remote sites
08 Applications
A1 Residential walls (load-bearing and non-load-bearing)
A2 Roof panels for cathedral ceilings and flat roofs
A3 Floor systems over crawl spaces or suspended applications
A4 Commercial buildings up to 4 storeys
A5 Modular and prefabricated construction
A6 Passive house and high-performance building envelopes
A7 Cool rooms and temperature-controlled environments
A8 Bushfire-prone area construction (up to BAL 30)
A9 Cyclone-resistant construction (up to Region C/N5)
A10 Extensions and granny flats
09 Sources & Standards
Sources pending — citations for this material are not yet recorded. Verify all figures against manufacturer data and current standards before specifying.