I am planning to power wash my deck and stain it afterwards. But I am confused with most of you saying Bleach it, one says NO WAY! My deck was built in 1987 as pressure treated lumber 2" thick vs. the standard 1 3/4", and was let go for the last 5 or so years by previous owners who moved out of state. It has a Cabot red stain on it; most of it gone, and a lot of green mold. It is in full sun from 10 a.m. to 4:30 p.m and it is tiered, so it slowly goes down 4 tiers. No way staining can get on french doors.
I plan on using a 2 gallon sprayer for the stain when the time comes, but pressure wash it with a Subaru Costco pressure washer. Quite a bit of wood is in bad shape. We plan on replacing in the next year or so.