There are a few HVAC insulation duct covers that don’t hold up well to our southern attics and sunshine. A recent home inspection revealed this problem. The current owner stated she just paid someone to fix her ducts but wasn’t able to get in the attic to check them. During our home inspection it didn’t take long to surmise she didn’t get everything she paid for. Approximately half the ducts had been poorly repaired and the other half nothing was done to. The outer plastic shell degrades quickly here and they loose some of there efficiency. You can see by the photo’s people will be paying to heat and cool their attic spaces.
This lower picture is another example of the attempted repairs