I need to remove moss from my roof.

Are you sure it is moss? It would have to have grown there for a very long time to clog your gutters. I think the guano or leaves are causing the build-up. Please check your gutters first. Clean them out either way. If it is moss, you will have to remove it also. Then spray with a commercial moss removal preparation or use a bleach solution. Either way, the guano and moss will come back. The leaf buildup can be prevented by installing leaf guards.

If you can get a plastic toy snake and move it around on your roof, it will help keep the birds away.

If it is moss use Wet and Forget

moss is a pain sometimes. hand removal before using an agent that will kill the plant.

purple power sold at Walmart. It is biodegradable. Spray it over affected area on a high humidity morning...that you know will turn into a sunny day. I have had good sucess with two applications. use recommended dilution for strongest mixture. Wear appropriate protection gear.

Spray with vinager this will kill moss then power wash with a bleach additive to prevent regrowth

You need to get a stiff broom and a moss removal kit at a home improvement store and get rid of all the moss. To keep it gone, wash your roof with a bleach solution twice a year