Dear Lanai in Florida your screens wont blow away

I built a lanai and was given round spline at the store. A handyman said we should have used flat spline and our screens will evidently pop out😞 is this true? Is it possible to replace the spline without replacing the screen?

Hi;

It depends what kind of vertical and horizontal bars you used to build the Lanai.
Many of the commercially available aluminum bars used in Florida require flat spline but not always.

But If you used round spline and it holds the screen cloth tightly theres no reason to worry that it will pop out. It sounds like the bars you are using were designed for round spline anyway.