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Yes, it is generally a very good idea to seal your deck after pressure washing. Power washing removes not only dirt and debris but also a thin layer of wood, leaving the surface exposed and more susceptible to weathering. Sealing is almost always needed after this process. After a general cleaning, sealing isn't automatically necessary if the existing sealant is still intact. You can test the surface by placing a few drops of water on it. If the water beads up, the sealant is working. If it soaks into the wood, it's time to apply a new sealant. If it has been a few years, it's wise to remove the old sealant, wash the deck, and reseal for maximum protection.

No, it is not okay to paint over rotted wood. Painting over rotted wood will not address the underlying issue and can trap moisture, leading to further decay. Properly addressing the rotted wood by removing and replacing or repairing the damaged areas is necessary before you can even consider painting.

The staining or painting process involves cleaning the deck, sanding surfaces, applying a primer (if needed), and carefully applying stain or paint for an even, lasting finish.

If you want to achieve a deeper, darker stain color, wait 5 to 10 minutes before wiping it off. However, wipe it off faster for a lighter tone. When wiping off the stain during this part of the process, be sure to work in the direction of the wood’s grain for best results.