What U-value is required for Passive House walls?

The Passive House standard does not prescribe specific U-values — it requires that the total annual heating demand does not exceed 15 kWh/m²a. However, to achieve this in Northern European climates, wall U-values of 0.10–0.15 W/m²K are typically required.

The Passive House standard does not prescribe specific U-values — it requires that the total annual heating demand does not exceed 15 kWh/m²a. However, to achieve this in Northern European climates, wall U-values of 0.10–0.15 W/m²K are typically required. In milder climates (Southern Europe), walls of 0.15–0.20 W/m²K may suffice. The Passive House Planning Package (PHPP) energy model determines the required performance for each specific project.

Why this matters

This question relates to Passive House Timber Construction: Achieving U-Values Below 0.15, which covers the broader topic in detail. Understanding this specific aspect helps architects, builders, and timber dealers make informed specification decisions.

For full context and additional technical detail, see our comprehensive guide:

→ Passive House Timber Construction: Achieving U-Values Below 0.15

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About this answer

This answer is part of the PuurModulair Knowledge Base — comprehensive timber specification guidance for architects, builders, and dealers across the UK, EU, and Scandinavia.