I am about to build my 1st deck. A simple 8' wide x 20' long attached to the solid cement foundation of the house. I have read all the articles, watched all the videos. But one lagging question remains...pressure treated lumber vs regular pine. I noticed some of the articles and instructions are sponsored by treated lumber companies and of course they recommend all PT lumber.
My lumber supplier and building inspector say why use PT except for any lumber that is within 6 inches of the ground. The majority of my deck will be 24" above ground with the exception of 4 support posts which will sit on cement.
The deck is in the mountains of So. California, extremly dry climate, snow is mild. Any suggestions, do I really need PT lumber on the beams, joists, ect or just the posts and stair stringers that in close proximity to ground?