Typical signs
- Cold areas, frost, condensation, settled insulation or wind-washing patterns in dust.
Where it is often found
- Attics, walls, rim areas, basements, around hatches and ducts.
What it can mean
- Incomplete installation, air leakage, water, blocked ventilation or wrong insulation sizing.
What to check next
- Identify water and air leaks first.
- Check heat clearances and ventilation before adding material.
Reasonable immediate actions
- Do not cover wet or contaminated insulation.
When to stop and call a professional
- Suspect asbestos/vermiculite, old wiring, heavy frost or dangerous access.
Prevention
- Air sealing, uncompressed installation, moisture control and ventilation.