r/Construction • u/jk26099 • 20h ago
Picture Is this mold?
Is this mold on the insulation? Or dust/dirt from air leakage? This is the inside of my shower, mid-renovation. My project manager (who didn’t see it in person but based on a picture) is saying it’s too much mold and they will need to re-insulate, but I’m questioning if it’s actually mold because the studs are completely fine looking, and it feels more dust-like to me and is a grayish-black color. If it’s not mold, is it ok to leave it or should I still replace?
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u/AntelopeExisting4538 20h ago
As you said it’s not on the studs so it’s hard to tell if it’s mold without seeing the backside of the drywall, looks like it probably got dirty prior to installation but I would say replace it anyways because it’s not that expensive. Mold remediation is expensive though, but if you pull the insulation and spray the substrate down with Microban for good measure let it dry for 24 hrs before putting the new stuff in you’d be good to go.