Air moving through fibrous insulation can filter dust and reveal leakage routes.
The short explanation
Air moving through fibrous insulation can filter dust and reveal leakage routes.
What to compare
Compare location, timing, weather or operating cycle, then open the matching Living House layer to see the plausible routes.
What would strengthen the explanation
A repeatable trigger and a physical route through the nearby assembly are stronger than appearance alone.
Next step
Document the original condition and choose the least destructive check that can separate the leading explanations.
Observe→Compare triggers→Repair source→Verify outcome
Living field guideThis useful article is public now. Sources, cases and graph connections continue improving without blocking publication.
