A cold floor traced to missing rim-joist insulation
The cold band followed the perimeter and intensified during wind, pointing to combined conductive and air-leakage losses.
✓Contractor Confirmedrecorded confirmation level
01 / OBSERVED
→Cold floor along an exterior wall
02 / CONFIRMED CAUSE
→Missing insulation and air sealing at the rim joist
03 / REPAIR
→The rim was air-sealed and insulated with compatible materials.
04 / VERIFY
Surface temperatures equalized and draft sensation fell during similar wind.
WHAT CHANGED THE DIRECTION
The evidence that separated the cause
Supporting clues
- Perimeter pattern
- Wind sensitivity
- Crawl-space visual gap
Checks performed
- Infrared scan
- Smoke test
- Crawl-space inspection
Field lessonA cold surface pattern often reveals geometry more clearly than room temperature alone.
