I'm in the process of finishing the new porch. The final step is the top railing. I'm trying to decide what joint would be best for the corners. First thought would be miter. But I have heard, and seen on the old deck railing, the miter cut is not the best option. I was thinking of half lap or half lap miter. The concern with either half lap joint is trapping water between the overlapping portions and causing the wood to rot more quickly.
So my question to the resident experts, what corner joint would you recommend for the deck top railing?