Anonymous wrote:Over the winter I discovered a little bit of mold on the spray foam insulation that’s right above the hatch door in my attic. The rest of my attic was mold free, and I looked carefully all around the air handler etc for leaks, and no water. I removed the mold, and it didn’t return for several months (last checked in June when changing AC filters). Yesterday I went up there to check, and saw the same areas where I had either cut off the spray foam or wiped it with a little mold growth. Again, I removed it, but I’m guessing I need to do more than that. Any suggestions of what the culprit could be? Humidity? It weird because it’s really only up high above where the hatch entrance is. I don’t see any mold on my closet ceiling where I access the attic. I assume now I need call in a mold remediation company to help figure out the issue and fix it, but I want someone honest. Any suggestions?
50/50 bleach, or 100% storebought bleach. It's already highly dilluted to around 5-6% sodium hypochlorate. Spray it on there. Repeat a few days later. Presto no more mold. If humidity is an issue, then solve that to prevent future growths of mold. There are always mold spores floating around in the air, but they need moisture/food to grow.