The mosquito mesh screen is the heart of any insect protection system. But not all meshes are equal – material, hole size, and weave pattern affect durability, airflow, visibility, and insect‑blocking ability. This guide compares the three most common mesh materials: PET (polyester), fibreglass, and 304 stainless steel.
Why Mesh Choice Matters
A poorly chosen mesh can tear within weeks, block too much airflow, or rust after a single rainy season. By understanding the differences, you can select a fly mesh screen that lasts for years and performs perfectly for your specific needs.
Comparison of Mesh Materials
| Property | PET (Polyester) | Fibreglass | 304 Stainless Steel |
|---|---|---|---|
| Tensile strength | Medium | Low | Very high |
| UV resistance | Good | Poor (fades/weakens) | Excellent |
| Rust resistance | Yes | No (can rust in coastal areas) | Yes |
| Pet resistance | Medium – cats can snag | Low – tears easily | Very high – virtually indestructible |
| Airflow (relative) | 85‑90% | 80‑85% | 75‑85% (depends on wire thickness) |
| Visibility | Very good, black mesh less visible | Good, but can glare | Slightly more visible but still good |
| Cost | Low‑medium | Low | High |
When to Choose Each Material
PET mesh is the best all‑rounder for most homes. It’s affordable, UV‑resistant, and soft to the touch. Ideal for windows where pets are not a problem.
Fibreglass is cheap but not recommended for long‑term use. It frays, tears, and degrades in sunlight. Only suitable for temporary or very low‑use windows.
304 stainless steel mesh is the ultimate choice for doors, coastal homes, and any area with dogs or cats. It will last for decades and never rust. The higher cost is justified by its longevity.
Mesh Density (Holes per Inch)
Standard insect screens have 18‑20 holes per inch (HPI). For blocking tiny sandflies or midges, choose 22‑24 HPI. For only large flies, 16 HPI may be sufficient. Keep in mind that finer mesh reduces airflow slightly.
Frame Integration
The mesh is only as good as its frame. PET and fibreglass are usually splined into aluminium frames. Stainless steel mesh requires stronger frames and splines. Always ensure the frame is powder‑coated aluminium (6063‑T5) for rigidity and corrosion resistance.
Maintenance
All meshes can be cleaned with a soft brush and mild soap. Do not use abrasive cleaners. Stainless steel may be cleaned with a cloth and water. Avoid pressure washers.
Conclusion
For most homeowners, PET mesh offers the best balance of cost and performance. For pet owners and coastal properties, 304 stainless steel mesh is the only sensible choice. MBORMC can supply screens with either material, custom‑made to your exact window or door dimensions.
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