 Hello, Gary. Yes, sir. How are you? I've got two quick, quick questions. All right. The first one's a compliment. I just had Brian Addis put on a roof, I guess it was the day before yesterday. Excellent. And did a wonderful, wonderful job. By the time they left, I didn't know they were here. I'll tell you what, they're top shelf. Thank you for saying that. Appreciate it. Okay. Now, my second one, I'm moving on now to foam insulation. I need to know what to look for in foam insulation when I'm doing these estimates.