Mark

We use an xjet to clean roofs,but we use straight 10.5% chlorine with a soap added.Regular household bleach through teh xjet would not be strong enough to get the job done.Although,the method mentioned in the article above would work with a pump sprayer.
Cleaning roofs with an xjet isn't the easiest method.Using a shur-flo pump with a PVC wand seems to be most effective for residential.Also,a small gas engine with a pum may be used as long as you are careful about run off.

Karvonens Pro Clean
Scott Karvonen