To clean a deck, repair any structural and cosmetic damage, sweep debris off the deck, then dilute bleach in a bucket to wash the boards. Use a stiff brush to wash mildewed areas, then seal the deck to protect it.Continue Reading
Inspect the deck to check for cracks and rotted areas. Replace rotting or bent boards, and remove rusty nails.
Use a long-handled broom to sweep leaves and dirt off the deck boards. Insert a putty knife in the cracks between the boards to remove rotted leaves and debris.
Dilute bleach in an equal amount of water, then use a sprayer or pressure washer to clean hard-to-remove dirt from the deck boards. Start in an inner corner, then spray parallel to the boards and continue to move out toward the opposite corner. Rinse the boards immediately. If there are mildew stains, use a stiff brush dipped in diluted bleach to scrub the stains until they are completely gone. Use a circular motion, and rinse the spots off right away.
To protect your deck and decrease the frequency of cleanings, apply a waterproof sealer with a foam roller.