DKCDKC
Platinum Member
Too much bleach affects the quality of the wood I believe, and can bring up aggressive grain and splinters. I use a mild bleach mix with a wetting agent like TSP, let it sit for 10 minutes, then rinse with a light, electric pressure sprayer. I let it dry several days then seal with a good sealer, not these cheap wax-based sealers. My decks usually last 5 or 6 years between sealings.