Well, I don't like to do things halfa$$ed, either. I'm kinda particular about the things I build, or work on. I don't just throw things together, and hope for the best. Like the coop I built. There was a lot of reading, researching, looking at what works, and what doesn't. Because there is most definitely a wrong way to build a coop. Some things you may get away with. Other things, done the wrong way, and you will end up with sick, and quite possibly a bunch of dead chickens.
I have deep bedding in my coop. Between cleanouts, the bedding may get to be over a foot or so deep in some spots of the coop. And, between cleanouts, you won't even see the floor. So who cares what the pattern of the vinyl looks like? Moisture proofing, does not, have to extend up the walls, DOES not. The roofcoat in my coop, covers the floor, and the edges of the 2X4" wall framing where the walls meets the floor. Heck, the whole front wall of my coop is open, year round, covered only with hardware cloth. Rain can blow in there sometimes. But, it is not big deal, because my floor is protected by a coat of rubber. You do not have to run waterproofing up the walls. Just painting the walls is more than good enough. We are talking chickens here, not hogs.
When I built my coop, I wanted it to look good, but be very practical in the way it works. Every aspect of my coop, has a reason for it being that way. Interior walls, in a chicken coop, is a bad idea. It may look prettier, with some smooth finished walls, like those in your house. But it is not a good idea, for the reasons I posted earlier. It's just a fact, that barnyard fowl will draw some undesired pests. Why give them their own private apartment in your coop? My coop does not have interior walls for THAT particular reason. Not because I was too lazy to install them, and said 'GoodEnoughForMe'. That is also the reason my coop is raised. So I can easily see under it, and make sure nothing is going on under there, that I don't want. Bottom line is, I'm trying to help you out, that's all. I'm not going to throw a bunch of stuff at you, without explaining why. Goodluck to you, with your birds.