Apple Roof Cleaning
Roof Cleaning Instructor
Man, these things are cool http://www.biljax.com/Products/Described/Product37.aspx
We use them every now and then for the "impossible" roofs http://www.propowerwash.com/board/upload/showthread.php?t=11136
We use them every now and then for the "impossible" roofs http://www.propowerwash.com/board/upload/showthread.php?t=11136