Technical Information
Engineering specifications, material standards, and compliance details for our prefab timber building systems.
Timber Specifications
All structural timber is FSC-certified, kiln-dried, and stress-graded to meet Australian and international structural standards.
| Species | Origin | Density | Thermal Conductivity | Typical Application |
|---|---|---|---|---|
| Radiata Pine | FSC-certified plantations, Australia & NZ | 450–520 kg/m³ | 0.12 W/m·K | Wall framing, floor joists, trusses |
| Norway Spruce | FSC-certified forests, Northern Europe | 430–470 kg/m³ | 0.11 W/m·K | Wall panels, roof beams, interior linings |
| Western Red Cedar | FSC-certified forests, North America | 330–390 kg/m³ | 0.09 W/m·K | External cladding, decorative finishes |
Australia treatment note: All structural timber destined for Australia is treated to H3 (exterior, above ground) or H2 (interior, protected) levels in accordance with AS/NZS 1604 to resist termites and fungal decay.
Structural Systems
Four integrated systems form the backbone of every prefab timber building we manufacture.
Wall Systems
Platform-frame and structural insulated panel (SIP) hybrid walls, 90mm or 140mm stud depth, with OSB bracing, breathable membrane, and cavity batten for drained cladding.
Floor Systems
Engineered I-joists and LVL bearers span up to 6m without intermediate supports, with particleboard or engineered timber decking ready for tile, carpet, or timber finishes.
Roof Systems
Prefabricated truss or rafter roof modules with insulation cavity, sarking, and fixing points for metal, tile, or shingle roof finishes, engineered to AS 1170 wind loads.
Connection Details
Pre-engineered bolted connections, galvanised brackets, and proprietary tie-down systems rated for wind regions A through D, with sealed junctions for airtightness.
Specification Table
Key performance metrics spanning size ranges, load capacity, lifespan, and maintenance.
| Metric | Specification |
|---|---|
| Floor Area Range | 30 m² to 300 m² per module |
| Internal Ceiling Height | 2.4 m standard, up to 3.6 m |
| Wall Thickness | 90 mm to 240 mm (insulated cavity) |
| Load-Bearing Capacity | Up to 2.5 kN/m² floor, 0.9 kN/m² roof |
| Design Lifespan | 50+ years with recommended maintenance |
| Maintenance Interval | Recoat cladding every 5–7 years |
Values are indicative for standard product configurations. Project-specific figures are confirmed in the engineering pack.
Building Code Compliance
We provide complete engineering drawings for local council approval. We do NOT guarantee automatic approval — local building codes vary by jurisdiction, and the property owner is responsible for lodging applications and obtaining permits.
Documents Provided With Every Project
- Architectural drawings (plans, elevations, sections)
- Structural engineering reports and calculations
- Energy compliance reports (NatHERS / Section J)
- Material specifications and FSC chain-of-custody certificates
Shipping & Packaging
Flat-pack components are packaged for sea freight, with weatherproof wrapping, bracing, and an itemised packing list per container.
20ft Container
- Dimensions (L×W×H)
- 6.06 m × 2.44 m × 2.59 m
- Payload
- Up to 28 m³ of flat-pack components
- Weight
- Max 28,000 kg gross
- Best for
- Small homes, granny flats, single-module extensions
40ft Container
- Dimensions (L×W×H)
- 12.19 m × 2.44 m × 2.59 m
- Payload
- Up to 58 m³ of flat-pack components
- Weight
- Max 30,480 kg gross
- Best for
- Standard family homes, multi-module commercial projects
4–6 wks
Manufacturing lead time
2–6 wks
Sea freight to destination port
1–3 wks
On-site assembly (typical)
Foundation Requirements
Our buildings can be founded on a range of systems, selected based on soil conditions, slope, and local council requirements.
Concrete Slab
Waffle pod or conventional reinforced slab — the most common choice for flat, well-drained sites with stable soil.
Pier & Beam
Concrete piers supporting perimeter and internal bearers. Ideal for sloping sites up to 1:10 and reactive clay soils.
Elevated Posts
Steel or timber posts on pad footings for steep slopes, flood zones, and pole-home designs in cyclonic regions.
Site Preparation Checklist
- Geotechnical soil report completed
- Site survey with contours and boundaries
- Setbacks and covenants confirmed with local council
- Utility connections identified (power, water, sewer/septic)
- All-weather access for delivery vehicles
- Clear, level laydown area for container unloading
Energy Efficiency
Factory-sealed construction and continuous insulation deliver measurable energy savings versus traditional building methods.
| Performance Metric | Prefab Timber | Traditional Build |
|---|---|---|
| NatHERS Rating | 5–7 stars achievable | Typically 4–6 stars |
| Wall R-Value | R2.4 – R4.0 | R1.5 – R2.5 |
| Roof R-Value | R5.0 – R6.5 | R3.5 – R5.0 |
| Air Infiltration | < 5 ACH @ 50 Pa | 10–15 ACH @ 50 Pa |
R-values are system totals including framing, insulation, and lining. Air infiltration tested in accordance with AS/NZS ISO 9972.
Have a Technical Question?
Our engineering team can tailor specifications to your site, climate zone, and local building code. Request a quote to receive project-specific technical documentation.