20x20 No-See-Um Screen vs 18/14 Screen: What’s the Difference?

If you're planning to repair or replace your pool cage or lanai screen in Florida, you've probably come across two common options: 18/14 standard screen and 20x20 no-see-um screen.

At first glance they may look similar, but the difference can significantly impact comfort—especially in areas like Sarasota and Bradenton where insects can be a real issue.

What do 18/14 and 20x20 mean?

These numbers refer to the number of mesh strands per inch:

• 18/14 screen = 18 vertical strands and 14 horizontal strands
• 20x20 screen = 20 vertical strands and 20 horizontal strands

Rule of thumb: the higher the number, the tighter the mesh.

18/14 screen (standard)

This is the most commonly used screen for pool enclosures and lanais.

Best for: homeowners who want maximum airflow and don’t deal with heavy insect problems.

20x20 no-see-um screen

This screen is designed to block very small insects.

Best for: homeowners dealing with biting insects or living in high-bug areas.

Key differences at a glance

Which one should you choose?

It depends on your situation:

• Choose 18/14 if you want better airflow and visibility.
• Choose 20x20 no-see-um if bugs are a major problem.

In Florida—especially in humid areas—many homeowners upgrade to 20x20 for better comfort, even if it costs a bit more.

Final thoughts

Both options are solid. The right choice comes down to your environment and priorities. If you’re unsure, a professional can help you choose the best screen based on your location and how you use your space.