Effective windbreaks reduce wind speed without behaving like solid walls. The useful design depends on porosity, fence height, orientation, terrain and anchoring — here is how to spec it.
A windbreak works by bleeding wind speed through a porous fabric, not by blocking it. A solid wall creates turbulence on the lee side; a ~50% porosity knitted mesh drops wind speed across a protected zone downwind instead. That is why porosity — not weight, not thickness — is the first number to spec.
Wind exposure that scars fruit finish and drops blossoms in orchards; wind chill on open livestock lots; spray windows lost to gusty afternoons; and fence structures that fail because the net out-spec’d the posts — the classic mistake of treating a windbreak like a billboard.
| Criterion | Working guidance |
|---|---|
| Porosity | ~50% open structure is the working standard for agricultural windbreaks — enough bleed to avoid turbulence, enough density to cut speed |
| Height & layout | Height follows the protected zone; orientation follows the prevailing wind; setbacks keep the fabric off the crop |
| Material | ~100 gsm knitted HDPE, 100% virgin resin with UV stabilization — permanently tensioned fabric lives or dies by its UV package |
| Edge & fixing | Reinforced edges, proper post spacing and anchors sized to the wind zone — the structure carries the load, not the fabric |
Product detail on the windbreak net page; layout physics in the orchard windbreak guide and porosity guide; a regional example in the New Zealand orchard case.
No — windbreak behavior depends on porosity and structure. A near-solid barrier creates turbulence and loads the posts; a ~50% porous knit protects a wider zone more gently. Denser is only better where dust or privacy, not wind speed, is the target.
Yes for wind exposure management on open lots — but spec it separately from shade duty and from animal containment, which are different products with different duties.
Yes — width and length are production settings. Send the fence line dimensions and we confirm producible options and MOQ (2 tons, mixed with other lines if useful).
Protected area dimensions, prevailing wind direction, terrain, and destination port via the contact page or WhatsApp — we reply within 24 hours with a layout and spec.