Green Or White Patches On Your Roof? Simple Methods For Removing Mold And Efflorescence

If you live near the ocean, you might have noticed green or white powdery deposits on your roof. The green is mold that can grow on your roof under piles of moist debris. As the temperatures rise under the debris, mold begins to grow.

The white powdery substance is known as efflorescence. You might have thought it was another type of mold but it's actually not related to mold at all. In fact, the efflorescence is caused by the high concentration of salt that is found in the air around beaches. When the water evaporates, it leaves a salt deposit on your roof.

Both mold and efflorescence can damage the shingles on your roof. You can prevent the damage by removing the build-up before it gets a chance to do any damage. Here are some simple cleaning methods you can use to get rid of mold and salt-water efflorescence.

Get Rid of Mold with Bleach and Water

Mold can be washed away by using a combination that includes bleach. It's a good idea to wash your roof at least twice a year. This will keep your roof clean, and prevent damage.

Supplies You'll Need

  • Ladder
  • Slip-resistant shoes

  • Water

  • Bleach

  • Garden sprayer

  • Hose

  • Wire brush
  • Push broom

Directions

  1. Put your slip-resistant shoes on.

  2. Fill your garden sprayer with water and add 2 cups of bleach.

  3. Use your ladder to climb up onto your roof.

  4. Beginning at the bottom edge of the roof, spray the mold with your bleach solution.

  5. Use your push broom to scrub away the mold.

  6. Move on to the next location moving up and over along the roof.

  7. Use your hose to rinse the entire roof and allow it to dry.

Wipe Out Efflorescence with Vinegar and Water

Efflorescence requires a higher alkaline cleaner, which is why you'll need the vinegar and water solution. Here's what you'll need to do to remove the white-powdery substance from your roof.

Supplies You'll Need

  • Slip-resistant shoes
  • Ladder

  • Garden sprayer

  • Vinegar

  • Wire brush

Directions

  1. Put your slip-resistant shoes on.

  2. Fill your garden sprayer with 1 gallon of water and 4 cups of vinegar.

  3. Use your ladder to climb on to your roof.

  4. Spray the vinegar solution on each efflorescence patch.

  5. Allow the solution to sit for about 15 minutes.

  6. Scrub each patch with your wire brush and rinse with clear water.

  7. Allow your roof to dry.

  8. Go over stubborn patches with a second treatment.

Whether you have mold, efflorescence or both on your roof, you'll need to get your roof cleaned as soon as possible. You can use these simple methods to remove the stubborn patches and keep your roof in good condition. (For more information on roof repair, visit here)

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