Gently wash the roof w/a mixture of bleach and water, 1 cup bleach per 1 gal water. If that's not strong enough, increase the bleach by 1 cup, not to exceed 5 cups. Note: Whatever runs off the roof, MAY kill the vegetation below. So have a plan for the runoff.
Once you clean the roof, mitigate the CAUSE of the mold. Open the tree canopy, increase air flow, trim back tree limbs. Altering light or temperature just a bit may be enough to make your problem go away!
My best to ya and hope this helps.
Jay J -Moderator
PS: God Bless America!
- 15 Old House Features We Shouldn't Abandon
- 17 Tiny Bathrooms We Love
- 30 Things Everyone Should Know
- 16 Sneaky Storage Ideas
- 20 Easy 60-Minute Home Improvements
- 9 Ways to Troubleshoot the Furnace
- 11 Real Haunted Houses to Visit--If You Dare!
- 9 Alternative Uses for Toothpaste
- 133 Smart Storage Ideas for the Whole House
- 16 New Ways to Store Kitchen Necessities
- 8 Ways to Make a Small Room Look Big
- 21 Expert Picks for Fail-Safe Colors
- 10 Fall Door DIYs for the Best House on the Block
- The Cheapest Ways to Boost Home Value
- 10 New Uses for Old Doors
- 10 Unexpected Uses for Spray Paint
- 8 Unique Ways to Build Your Own Table
- Woodworking for Beginners: 10 Projects
- 8 Amazing Handmade Kitchen Counters
- 10 New Uses for Old Dressers
- 7 Upgrades You Can Do in Under 300 Seconds
- 10 Thrifty DIY Ways to Organize Your Home
- 26 Easy Painted Pumpkins for Halloween
- 9 Totally Amazing Mobile Home Makeovers
- 5 "Make in a Weekend" Bookshelf Projects
- 3 New Ways to Decorate with Fallen Leaves
- 10 "Zero Dollar" Storage Hacks
- 121 DIY Ideas for Halloween
- The 10 Best Things to Buy Secondhand
- 16 Must-See Coffee Tables You Can DIY—Easily!