I am not an expert at paint finishes and wood types. But I have personally painted many “Wolmanized (pressure treated lumber) and with a good primer I have never had one peel, blister, fail. This wood is the west coast best idea, at an affordable lumber! I always topcoat with SW latex based gloss enamel. Or equivalent.
Yes, i did but I always use oil-based paint on raw wood.
Yes, the shrinkage depends more on how wet the wood was when you first bought it. I always paint the wood immediately upon unloading it with a good oil-based paint and do not experience any shrinkage.
Yes, I just built my ramada (a little bigger than a pergola) but made sure I painted it with a good oil-based paint.
I used it for an outdoor ramada but painted it with a good oil-based paint to waterproof it as well.
Yes, I used it for rafters for my garage roof and back patio roof. Both roofs hold up heavy ceramic Spanish mission tile.
I would not bury the boards directly in the soil, however, they can touch the soil without any problems.
Yes one person can easily lift a board. I did not actually weigh it but my guess is 10-15 pounds.
Area = Width x Length (sq')