Wainscoting (paneling) over masonry -- fir, drywall, or both?
I'm putting beadboard halfway up the wall in a room, two walls of which are masonry. One of the masonry walls is an exterior wall that is double-thick brick (almost 16" deep!). The other is an interior wall (between townhouses) that is concrete block.
What is the best way to beadboard these surfaces? I came up with
- Fir, then beadboard on firring strips
- Drywall, then beadboard
- Fir, then drywall, then beadboard
- Some combination of the above + some sort of insulation
Drywall directly on the masonry seems like a moisture problem waiting to happen. Fir + beadboard seems like an insulation problem, although I have to say it's not a big concern given that the wall area in question is small (about 6x4) and the brick is really thick. Fir + drywall + beadboard might be an obvious good solution, but would end up being too thick unless I use really thin firring strips and/or really thin drywall.
If it matters, the beadboard is tongue & groove hardwood.
I'd be glad for any ideas or thoughts.
Thanks!