I hope this post isn't overly redundant. I've read through several informative threads on the general subject of cleaning and maintaining a deck, but was wondering if someone could hone in on my situation with a few specific suggestions.

My deck is redwood, about ten years old. When it was new, I used an oil based sealer with the brand name of "Duck's Back," or something close to that (in case you are familiar with it). I cleaned the deck several years ago with a bleach-like cleaner (maybe not the best thing to use) and resealed it with Duck's Back. The deck is now overdue for cleaning/sealing again and I would appreciate suggestions on:

1. A pre-wash, assuming I am going to use a pressure washer on it. What is a good pre-wash to use?
2. Technique for pressure washing. For example, what is maximum psi to use, and what type of nozzle should be use?
3. Best sealer to use? The "Duck's Back" mentioned above is still available, but is there something better?

Any other tips would also be appreciated. I have just expanded the deck and am wondering if I have any chance of restoring the old part good enough to match the new.
Thanks

 

Hi Kray/ I use Wolman products for cleaning and have found them to be superior. Wood and fence brightener. The tip size is what you should be most concerned about rather than pressure. I use a 3000 psi washer but am careful about how far the nozzle is away from the wood. The cleaner is applied with a 40degree tip at low pressure. Then I go to a 25 or 15 tip. If your not experienced with pressure washers I would try a 2000 or 2400 psi washer. You can really gouge the wood if your not careful. Your best bet for stains is Sherwin-Williams Dekscapes or even better Sikkens

 

I would use Sikkens before any others. It is really an awesome product and yields a beautiful honey color. See photo at xxxxxxxxxxxxx