The core idea
Missing, displaced or compressed insulation can create localized cold or hot surfaces and reduce drying behavior.
How the mechanism works
Reduced thermal resistance changes surface temperature and may increase air movement through the same defect.
When it becomes relevant
Typical trigger: Seasonal temperature extremes, recent work or disturbed cavities.
Evidence that supports this interpretation
- A sharp thermal anomaly aligns with a cavity
- The area differs from neighboring bays
- Draft evidence accompanies the temperature difference
Evidence that weakens it
- The surface temperature is uniform
- The anomaly moves with sunlight
- The symptom is entirely plumbing-linked
What this concept cannot prove alone
A single observation, image or meter reading cannot confirm the complete failure pathway. Use this concept to form better questions, compare alternatives and decide which safe observation would be most informative next.
Safety and professional boundary
Opening finished assemblies or disturbing older insulation may require hazardous-material and electrical precautions.
Primary references for this topic family
These references ground the general building-science or safety context. They do not diagnose a specific house, replace local requirements or certify a repair.
