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[Adsos Letter]

13. You don't need to powerwash with the bleach

Power washing involves high pressure spray; simply apply the bleach/wood brightener with a hudson-type sprayer, let it sit for about 15-20 minutes (but don't let it dry) and then rinse with clean water. Some painters will scrub the bleach in a bit with a stiff broom, but I've found that it works just fine without that step.

...a beautiful silvergray fence that last me 15 years???

That is the way it is designed to work. Over time, the cycles should become longer as the tanin levels in the wood decrease. At some point the washing will primarily be dealing with mildew, etc., and the deteriorated surface fibers of the wood. If you want, you can switch to the weathering stain at any point in the cycle. It is a semi-transparent product, but the pigment in it provides greater UV protection.