Fly Screens and Door Curtains: What Actually Keeps Flies Out

Physical barriers are among the most reliable ways to keep flies out, if they fit properly.

The short answer

Fine mesh fly screens on windows and vents, well-fitted door screens, strip curtains and air curtains reduce entry, but gaps, open doors and poor maintenance defeat them. Choose a mesh fine enough for flies and mosquitoes, fit it snugly, repair holes and combine with sanitation, since barriers do not stop flies breeding indoors.

Options

• Mesh window and vent screens.
• Magnetic or sliding door screens.
• PVC strip curtains for commercial doors.
• Air curtains over busy entrances.

Choosing and fitting

1. Pick a fine mesh suitable for small insects.
2. Measure carefully and fit without gaps.
3. Check hinges, edges and corners.
4. Repair holes quickly.

Limits

• Do not stop flies already inside.
• Fail if doors are propped open.
• Need cleaning and maintenance.

When to call a professional

If the problem is widespread, keeps returning or you are unsure what you are dealing with, a professional inspection will save time and avoid wasted effort.

Frequently asked questions

Do screens reduce airflow?

Slightly, depending on the mesh.

Are air curtains effective?

When properly sized and used.

Do I still need cleaning?

Yes.

Can I fit screens myself?

Often, with care.

This guide is part of IPest's complete resource on fly control. For identification help, prevention and treatment options, see our full fly control guide for Bangalore.