Greenhouse polytunnels have revolutionized growing-whether you're a home gardener, small-scale farmer, or commercial operation. But the secret to a high-performing tunnel isn’t just the frame; it’s the plastic cover you choose.
Thickness matters. And when it comes to durability, climate control, and long-term savings, 250 micron polythene stands above the rest. Let’s break down why.
Micron Thickness Explained: Why 250 Micron Wins
A micron (µm) measures plastic thickness-1 micron = 1/1000th of a millimeter. Here’s how common grades compare:
| Thickness | Best For | Lifespan |
|---|---|---|
| 180 micron | Temporary covers, mild climates | 1–2 seasons |
| 200 micron | Moderate weather, seasonal use | 2–4 years |
| 250 micron | Heavy-duty, year-round growing | 5–7+ years |
Key Advantages of 250 Micron Plastic:
✅ Unmatched Durability - Resists tears, wind stress, and hail damage.
✅ UV Stabilised - Withstands full sun for years without brittleness.
✅ Superior Insulation - Traps heat and stabilizes humidity for healthier plants.
✅ Cost-Effective - Fewer replacements = lower long-term costs.
What to Look for in Quality Greenhouse Plastic
Not all 250-micron plastic is equal. Ensure your cover has:
🔹 High UV Resistance (Look for 5+ year ratings)
🔹 Anti-Drip Coating - Prevents condensation that blocks light and spreads disease.
🔹 90%+ Light Transmission - Maximises photosynthesis.
🔹 Seamless Widths - Avoids weak points; custom sizes prevent joins.
Pro Tip: Test plastic by hand - quality 250-micron film feels thick, flexible, and slightly rubbery (not crinkly or thin).
When to Choose Thinner Plastic
180–200 micron might suffice if:
- You need a short-term seasonal cover.
- Your climate is mild with minimal wind.
- Budget constraints outweigh longevity needs.
But remember: Thinner plastic often costs more over time due to frequent replacements.
The Bottom Line
Investing in 250 micron greenhouse plastic means:
- Fewer replacements (save time and labor).
- Better plant growth (stable temps, humidity, and light).
- Storm-proof peace of mind (no panic repairs before harvest).
Whether you’re protecting heirloom tomatoes or a commercial berry crop, thickness = performance. Don’t compromise - build once, grow smarter.
Ready to upgrade? Explore our 250-micron polytunnel covers here.
