flowerbug
Garden Master
FB: that is what my ex painting contractor husband does for moldy walls outside. Cheap old bleach and a pressure washer. And old clothes and goggles please.
yes, good idea about the eye protection. i wear glasses so tend to not use safety glasses (my glasses are safety glasses).
the thing i should mention though is that some siding is not safe to be bleached, but most of the aluminum or vinyl will be ok with a weak bleach solution.
i don't have a pressure washer so can't say much about that.