removing mildew from composite deck

If you are cleaning to remove mold or mildew, there may be more to consider before you begin: "Chlorine Bleach has been proven to kill bacteria, viruses and fungus but has not been proven effective in killing or removing molds on porous surfaces such as composite decking and this fact is stated on the label directions 

If mold or mildew is present on your deck, use a composite deck cleaner such as Rhino Hide's, oxygen bleach powder, UltraMean2. An oxygen bleach works to remove the mold growing inside the deck, not just cleaning the surface. Follow the instructions on the label and be sure to rinse thoroughly with a 

You can clean some things with regular liquid dish soap and water. Tougher stains from barbecue grills, tree sap, mold, mildew and algae may need more powerful powdered oxygen bleach you mix with water. The issue in your case is that your composite decking, and several other brands, contain 

Proactively clean original decking, at least twice yearly, or when stains appear. Rinse the deck with a hose to remove dirt and grime from the surface. You can use a quality composite deck cleaning product at up to 1 2 strength, costing 1 2 the 

Cleaning algae on composite deck: Even composite decking requires regular care. Compared to painting or staining The greenish discoloration you're seeing on the decking is probably not mildew, which is usually dark gray or black in color, and doesn't survive well in the open air. More likely it's lichen, algae or moss 

For serious layered-on mold or moss, then I like oxygenated cleaners with sodium percarbonate - I use it straight (commercial cleaner) but is available in many deck cleaners like Oxy-Clean - I use with Borax added (which is a mold mildew preventative). May have to be followed up with one of the above two 

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