FYI, I insulated my personal theater with 2 layers of OC R30 in the 20" trusses that make up the ceiling structure. The smell was so bad I complained to OC. They came out inspected, agreed, and paid me for the cost to replace it with a different brand. Very good of them really. I can't say enough good about their customer service. But 'd be careful using OC pink inside. Their new binder has an odor, I don't think they are expecting people like us to put it inside living spaces. I replaced it with Knauff.