Earlier this week prior to drywalling, we had to fireblock our soffit with this stuff:
Roxul aka “rotten cotton”. Made of stone, this stuff will stop fire but is really awful to work with because it can stick in your skin, lungs, eyes… like fiberglass insulation. This is actually the second time we’ve used it and both times I was the lucky volunteer installer because I’m not scared of no insulation 🙂 :
Note the long sleeves, bandana, mask and gloves- I’m not a fan but they also recommend eye protection. The Roxul was extremely difficult to find; the people at Lowes/ Home Depot gave blank stares and we ended up getting it from a building supply place. Also, in case you’re wondering, we took this precaution and went to all this trouble… because our inspector requested it!