 And it's equally as important, maybe even more important. Yes. If that stuff begins to break down, it doesn't matter how great the shingles are because it starts to get the wave in it. Yes. The dips. Yeah. If you want to get the full story and be able to give a proper assessment, you've got to go in the attic. You've got to see it. All right. I love that. So when you guys come in and you do that ventilation assessment, and let's say you look at it and you're like, Ray-