How Did They Do?

As we know it takes more than just water and a pressure washer to successfully operate an exterior cleaning company. It's technique time. On a scale of 1-10, how did they do?

It's hard to tell from the video the height of the roof structure or any type of safety precautions, but would always advise any washer to ensure safety is paramount in your cleaning processes. I would also recommend spraying the LOWEST point of the roof structure and work up towards the peak to "stack" your soap/bleach mixture to avoid any hot spots or streaking on the shingles. This is especially concerning during the hot summer months or hot climates. 

Overall, it looks like a nice result and earns an 8 out of 10.

Nice job.