Untreated 5 year old deck

[Ernie Greese 14]

I have a 5 year old PT pine and cedar deck that has never been sealed or cleaned since we had it built. It's in great shape but extremely dirty green and grey. What is the best way to clean this kind of wood in this condition? I have loads of caustic along with citric and oxalic acids. So I guess I'll do it myself. Or do you even use caustic on bare wood? Any suggestions would be appreciated.

[plainpainter 217]

I'd use bleach and TSP

[Beth n Rod 1,279]

I would suggest a percarbonate to clean with, and then neutralize. Drop the pressure a the tip to 1000psi. The cedar in particular will scar very easily. You don't need to strip in this case.

Beth

[Ernie Greese 14]

Oxyclean and Citric or TSP and Bleach. I have both.