What is the difference between warm frame and cold frame insulation?

A 'warm frame' places insulation outside the structural timber frame, keeping the frame within the heated envelope and at room temperature. This eliminates thermal bridging through studs and keeps timber dry (warm timber doesn't attract condensation).

A 'warm frame' places insulation outside the structural timber frame, keeping the frame within the heated envelope and at room temperature. This eliminates thermal bridging through studs and keeps timber dry (warm timber doesn't attract condensation). A 'cold frame' places insulation between studs only, leaving the outer face of the frame at external temperature. Most modern timber frame walls use a hybrid approach: insulation between studs PLUS external insulation to create a 'warm frame' effect while maintaining reasonable wall thickness.

Why this matters

This question relates to Insulation for Timber Frame Homes: Materials & Performance Comparison, 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:

→ Insulation for Timber Frame Homes: Materials & Performance Comparison

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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.