 my basic question is I don't want to create anything that's gonna, well, you don't want to get two vapor barriers into a wall. Um, so, you know, I mean, when you talked about foam, number one, that's the best thing to use, quite honestly, because you're going to get a higher R value per inch of thickness. So that's good. And you can have a choice of breathable or non-breathable water vapor, non-water vapor. Um,