When you spray is it from the edges to the peak or peak down?
Both, depends really on the layout.
As always situational circumstances. Thank you sir!
Getter done Coop 
From the peak down because gravity rules.
Gravity rules! Wash from the peak down. Before washing, inspect the shingles for plant material like pine needles, leaves, moss or lichen to see what has caused the mildew to develop from a spot. If you skip that inspection your work will be in vain because the mildew will form again fairly soon.
That is just not true at all 
who certified this guy
Experience taught me this stuff. The trouble with learning from experience is that teacher gives the exam before giving the lesson. BRW the book “Acres of Diamonds” is a very motivating story and the principles taught in it are rock solid.
Dude stop giving advice. You have no credibility. Spent some get to know people. Or more importantly let people get to know you .
BEFORE GIVING ADVICE.
I’m starting to think this is AI, GPT-3.
They are among us. 
How far that little candle throws its beams! So shines a good deed in a naughty world. — William Shakespeare
I do have an account.
