I have an '07 Roadtrek Agile and the carpet is gross. Anyone know what this black/brown underlayment /subfloor is? Can I nail to it? Will it hold glue? There are small staples holding down the carpet now. I'm thinking or ripping out the carpet and vinyl, then running vinyl planks. I know it expands and contracts but it's only 4 boards wide so I doubt it will be a big concern. I want to nail/trim screw down the shoe molding though and I'm not sure about the subfloor...