when you poke the cord the screen will tighten up, so dont get it too tight or it will rip the screen
I have had this happen to me as well. The screen gets too tight and rips along the edge of the metal frame.
The other thing that happens is that if the screen is too tight and put the cord in and it gets even tighter (without ripping the screen) the two sides of the metal frame can start to bow inwards, kind of making the frame look like an hour glass.
This happened to the two frames for the screens in the storm door in our breezeway. I was replacing the screens and I thought maybe I was holding them too tight around the frames before I pressed in the cord, but I kept going anyway.
When I was done I thought good, nothing ripped. Then I cut off the excess screen material and got everything ready to put back in the storm door. That is when I noticed that both of the frames now bowed in slightly towards the center. I was like WTF is that? I tried to push the frames outward to fix it, but the screen was just too tight to stretch. I had used the vinyl screen material too, so I thought it might stretch a bit to fix the issue. Nope.
It is still like that to this day, 5 years later. I just took out the glass panels and put the screens into that storm door today because it is warm here in NJ today, and my wife wanted to air out the house.
I keep telling myself that I will replace the screens to get rid of that stupid bowing inward of the frames, but then I think what the hell, I might as well wait until the pets or the kids rip thru the screens and then I have to do it.
Jim