Do Basic Care and CleaningYou should clean wood siding annually. Warmer weather provides an opportunity to give your siding a refreshed look in anticipation of summer conditions. To get the best clean, you’ll need warm, soapy water and a soft-bristled brush to get the best clean. Additionally, go from the bottom to the top when washing to prevent annoying drip marks. Once you’ve cleaned your entire siding, you can address stains you come across.
You can eliminate any mildew you find with a fungus-killing cleaner and a good rinsing afterward. When applying the cleaner, ensure you’re wearing eye protection and shield any surrounding plants from the cleaner’s effects.
Rust stains are also common when you have nails or screws without galvanization. These have no protection from the elements and thus oxidize when they come into contact with moisture. This rusting process leaves streaks that stain the wood. You’ll want a solution of oxalic acid dissolved in warm water to remove such stains. Remember to wear eye protection and protective gloves when applying the solution.