How to Remove Black Mold from Roof Eaves

man on ladder removing leaves from gutter

Mold and mildew is a hazardous effect of roof leaks, and a common spot for mold growth is right under the eaves of the roof. Little sunlight and low air movement provide an ideal environment for mold growth. Let’s examine how to best remove black mold from underneath roofing eaves.

Once black mold starts to grow it will colonize and spread throughout the home. When you discover it, act fast to stop it from spreading. It helps to clean black mold in the summer so the eaves have a chance to completely dry out.

Black mold causes structural damage inside and outside the home and can become a serious health hazard, so it’s best to remove it as soon as possible.

Before attempting to remove the black mold gather the following tools and clothing:

  • Stiff wire brush
  • Large bucket
  • Vinyl gloves
  • Long-sleeved shirt
  • Googles
  • Protective mask
  • Pressure washer
  • Chlorine bleach, fungicide, biocide
  • Plastic tarp
  • Ladder
Having the right tools for the job is crucial for properly completing any project. Read further to discover the best roofing tools to have for the DIY homeowner.

Remove black mold with a pressure washer

Start by gathering the right supplies for the removal. Get some thick vinyl gloves, a proper respiratory mask, goggles, and a long sleeve shirt. You’re going to want to protect yourself from breathing in mold spores, and the long sleeve shirt will keep you from getting wet from the pressure washer.

1. Connect the pressure washer to an outside faucet. Make sure the pressure-switch is NOT on a jet spray, as this setting can strip away paint and damage wood.

2. Be sure to keep the nozzle at least two feet away from the house. Once the pressure washer is set to an appropriate setting, work in a continuous direction around the house.

3. Spray underneath all the roof eaves until the mold is removed.

Keep reading about proper roof maintenance and upkeep practices:

Disinfect the roof eaves with a cleaning solution

Clean black mold from roof eaves

Now that the mold is removed you need to apply a disinfectant to prevent it from growing again. Start by preparing the bleach solution, biocide, or fungicide per the manufacturer’s instructions.

1. If you’re using bleach, mix a solution of three parts bleach to one part water in a gallon bucket.

2. Set the bucket aside and cover plants and landscaping features with a tarp to protect from the bleach solution.

3. Position the ladder under the roof eaves and carefully bring up the bucket and a stiff wire brush. Scrub the eaves thoroughly until all organic matter is removed.

4. Work continuously around the house, moving the tarp if necessary, until all of the eaves have been treated. Inspect the eaves a week later to confirm the mold does not come back. If it does, repeat the process or consider hiring a mold remediation specialist.

Preventative action is best when it comes to permanently stopping black mold growth. Remove any excess shingle overhangs, clean clogged gutters, and repair roof leaks causing excessive moisture damage. If there are vines or tree branches touching the roof eaves cut them back to allow adequate sunlight.

It’s a lengthy and labor-intensive project, but removing black mold will aid the life of your roof and its component parts.

Always exercise extreme caution when working on a ladder and tell someone how long you plan to be outside. If you're concerned about roof leaks or curious about how to solve common roof problems, read on to learn more: