This post was updated on April 11, 2023
Cleaning Deck Stain with Mold
Mold and mildew can cause aesthetic, safety, and health issues when they grow on top or within the wood of decks. Often time mildew and mold will grow on top of your deck stain and you would like to remove it, but not harm or hinder your deck stain coating. When this happens it is not suggested to use a regular Wood or Deck Cleaner or Wood Deck Stain Stripper unless you plan on reapplying another coat of your deck stain.
How to Clean Mildew From Deck Stains
The best option is to use a Mildew Cleaner and Preventer that will clean and prevent the stains from returning but will not harm your wood/deck stain coating. This will keep your wood and decks looking better in the off years between reapplication of the wood stains.
Pro Tip: The RAD Guard will remove the black mildew and green algae stains from your wood and deck stains and will prevent them from returning for 1-2 years: RAD Guard Mildew and Algae Cleaner and Preventer
More information on Cleaning Deck Stains with Mold & Mildew
- Mold and Mildew on Wood Decks
- Black Mold and Deck Stains
- How to Remove Mold and Algae From Decks
- Restore-A-Deck Wood Stain Review

As an article and comment contributor to the site, Scott has been around the pressure washing industry since attending college. In 1993 he started his first company called Oakland Pressure Wash specializing in exterior pressure washing and deck staining. That company evolved into OPW L.L.C. shortly thereafter concentrating more on exterior wood and deck restoration. Scott and his Deck Cleaning Michigan company have restored over 10,000 decks in the Metro Detroit area since the early years. He has become an authority in the deck restoration industry and has contributed to numerous wood restoration forums and informative sites.
All the products he suggests through this site are sold through online sites and in retail stores, allowing the consumer to choose their own means of purchase. Scott’s eCommerce sites do sell many top brands he endorses and if you appreciate any of the help he has offered then feel free to purchase from one of them.