This an OPINION loaded question and good professionals here will disagree on the use of bleach when cleaning decks.

I've seen products that advicate the use of bleach in them when cleaning decks,sidings etc. such as JOMAX.

I for one believe in the use of Chlorine which is 2.5 times the strength of bleach in my mix to just clean decks. I've tried other cleaners but I am very satisfied with my cleaning mixture which is very Cheap for me to use and with excellent results.

Its just a matter of Opinion where guys Like Jim Bilyeu who is a top professional will say no to bleach and companies like JOMAX will say otherwise.

The only way to learn is by trial and error with hopefully not to much of the error.

Good Luck

John Tornabene
Clean County Powerwashing