This video may help: https://www.youtube.com/watch?v=1AZpJcedJUk Try this product also #affiliate https://amzn.to/2IAeF34
Moss grows best in shady, damp areas. Could you eliminate some trees or at least trim some limbs in your problem area?
Yes l tried that, thank you.
Hello this a Hometalk link =How to Kill Moss With Vinegar may help.
Pour 1 gallon of undiluted 20-percent acetic acid vinegar into a garden sprayer. Use less for very small areas to conserve vinegar.
Additionally-Here are some links to help assist with moss elimination efforts.
Bleach/water at 50:50 ratio will kill it, depending on where the algae is. You have to be sure to protect whatever vegetation might get dripped on by the bleach water water though. We have it on the north side of the roof, and one brick window sill that's always in the shade!