I have mounted the walls in the entry. It is that little room after you are in the house but not past the kitchen sink. I used 1×4 pine furring strips from Lowes. I hand picked the ones I wanted from three seperate stores.
I was also able to side most of the entry and hang the porch light. (More on that later.) the siding is pine and cedar. I liked the contrast of the two woods. The sills above and below the window are at a slight angle to divert water away and are about 1/2″ thicker than the planks. Water should drip away now not just run down. I guess I will know when it rains.