So they wanted to drain the flat part of the roof, through the interior, through the screen, into the gutter?
Yes. I forgot to mention that two neighbors asked me if I was there to fix their roof too.
Erol, I have never come across a drainage system like that, huh (spit)–::)))
Learn something everyday----![]()
I thought it might be a new way to install a pet door, for the Cat! 
Erol. Bet you $10 that this monstosity was in the Architect’s drawings 
Buyer is willing to pay for a better method of deck drainage. Not seeing this before, I don’t what type of professional to recommend. Help here appreciated.
Call me, Erol. I have a guy or two.
Just remove the screen, apply a piece of 1’x2’ plywood standing up behind the opening, find a tennis ball, and enjoy hours of fun.
We call that basketball round here.