Good evening Randy, Nice to have you aboard.

If you have any questions, the search button above will get you the answer otherwise feel free to ask one of us.
If you are interested in getting certified then study hard and start cleaning roofs when you are comfortable. Then start to ask questions as you are getting the feel for roof cleaning and take notice of certain things that you are concerned with. It is always best to practice on your own roof and maybe a friend or family member's for a while until you get your feel. This is the best way to do it.
Every answer you could possibly need for building a pump or system is available via the search button.
Good luck my friend!

Welcome Randy.