This might be slightly off topic, but I know many of you home theater builders have must have encountered this... Is "Pressure Treated" wood required for use on the bottom plate of a framed wall? I saw this on Google while searching for something else. Please tell me it is not required. I've already framed 75% of my basement with standard 2x4x8 pieces (Premium kiln-dried lumber from Home Depot). I can only assume they're all not pressure treated... If this is true, why is this necessary? I really don't want to rip down the walls just to replace the bottom plates! Especially now that they're nailed into the concrete floor.