Patio deck drainage problem

[Dk1Projekt]

Hey everyone. Was wondering what I could do to with my drainage issue on my deck. The water falls down to the corner of the screen enclosure and I see that mildew/mold is starting to appear I. That area. It's a concrete deck with an acrylic coating. I was thinking about drilling a hole on the side of the screen. But don't know if I would compromise the screen enclosure. TIA btw I have a photo. But I don't see any upload feature (?)

 

[sd122]

Get a chipping hammer or concrete saw and cut a 12x12 hole. Get a 12x12 drain with grate and cement it in. Run 3-4" pVC out to the desired drain area and dig a 4ft x 3ft hole and fill it with gravel. Slope the pipe 1" for every 8ft. Done...