Need to put a privacy wall on one side of the deck. Looking at 6 ft tall, 1 x 6 staggered vertical slats. I'm seeing that treated wood is pretty much sold out everywhere here in all lengths. I'm wondering if regular wood with good deck stain would last? Be vertical with a top plate and inner and outer slats separated by 2 x 4s. I put a new floor on the deck 5 or 6 years ago, treated wood, and it's pretty shabby already even with a good coat of stain. Will standard wood rot like this? Opinions?