SIP Panels vs Timber Frame Construction: Complete Comparison 2025
Choosing between SIP panels and traditional timber frame construction? This comprehensive guide evaluates both methodologies across critical performance metrics to help you make the right decision.
Structural Differences
SIP Panels: Factory-manufactured sandwich panels with PIR foam bonded between OSB boards. The entire panel acts as a structural unit.
Timber Frame: Site-erected timber stud frameworks with separately installed insulation. Structure and insulation are separate components.
Cost Comparison
| Factor | Timber Frame | SIP Panels |
|---|---|---|
| Material Cost | £60-80/m² | £89-134/m² |
| Labour Cost | Higher | Lower |
| Total Project Cost | Similar | Similar |
Installation Speed
SIP Panels: Achieve weathertightness in 1-2 days
Timber Frame: Requires 3-5 days to weathertight stage
Thermal Performance
| Metric | Timber Frame | SIP Panels |
|---|---|---|
| U-Values | 0.20-0.30 W/m²K | 0.144-0.209 W/m²K |
| Air Leakage | 8-10 m³/h/m² | ≤3 m³/h/m² |
Long-Term Value
Despite higher upfront material costs, SIP panels offer reduced labour expenses and 30-40% lower operational heating costs. This creates cost parity over two decades.
DIY Accessibility
SIP Panels: More DIY-friendly, comparable to flat-pack assembly
Timber Frame: Requires carpentry expertise
Design Flexibility
Timber Frame: Accommodates complex geometries more easily
SIP Panels: Excel with rectangular configurations
Our Recommendation
For most garden rooms, extensions, and self-builds, SIP panels offer the best combination of performance, speed, and long-term value. Choose timber frame only if you have very complex architectural requirements.