The Roof Cleaning Institute Of America Training & Certification Forum
"Find A Certified Roof Cleaner Directory"

This is all explained in other threads. You need to read, read, read, and read some more before posting a question. Use the search feature to find what your looking for. Its all here trust me. The Godfathers ( Dave, Mike S., Chris Tucker, and others) of this site have posted enough info for you to learn and clean roofs and make some money.

We are on here to help but you need to read and learn on your own too. If you read something and searched something an still can't find the answer then post a question.

Good luck in your journey.