Standard window screens are designed to keep insects out, but pollen particles are much smaller than insects. Here's what you need to know about pollen and window screens.
Can Pollen Get Through Window Screens?
Yes — standard window screens are designed to keep insects out, but pollen particles are much smaller than insects and can pass through standard mesh openings. Standard fiberglass and aluminum screens have mesh openings of approximately 18x16 per inch, which is effective for keeping out flies, mosquitoes, and other insects, but allows pollen particles to pass through.
How Small Is Pollen?
Pollen particles typically range from 10 to 100 microns in diameter, with most common allergens (grass, tree, and weed pollen) in the 20–60 micron range. Standard window screen mesh openings are approximately 1,000 microns — far larger than most pollen particles.
Fine Mesh (Allergy) Screens
Fine mesh screens, also called allergy screens or no-see-um screens, have much smaller mesh openings — typically 20x20 per inch or finer. While these screens significantly reduce pollen entry, they also reduce airflow compared to standard screens.
Practical Tips for Allergy Sufferers
- Install fine mesh screens on windows you open most frequently
- Keep windows closed during peak pollen hours (typically early morning)
- Combine fine mesh screens with an indoor air purifier for best results
- Clean screens regularly to prevent pollen buildup on the mesh itself
Screen Masters Can Help
Screen Masters installs fine mesh allergy screens throughout Greater Los Angeles. We come to your home, measure, and install on-site. Call (323) 313-8167 for a free estimate.
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