Deposits in attic

Found some strange deposits in the attic of a 50s home in Southern CA. Home has been fairly neglected for 10 years or so. These dont look like mold and there is no spray insulation. Deposits are widespread in half of attic. Same half has the majority of ductwork and ventilation for HVAC, which was replaced in 2010.


Looks like residue from the insulation blown in the attic

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That is what it looks like from where I am. It also looks like some dry rot in the sheathing and some of the framing. :thinking: did you look?


^^^^^ Agreed.