Most shade cloth works by blocking light. Aluminet works differently — it reflects heat back out while still letting in diffused, usable light. That one difference changes how cool a greenhouse runs and how evenly plants grow.
Most shade cloth works by blocking light. Aluminet works differently — its aluminised knit reflects heat and radiation back out while still letting diffused, usable light reach the crop. That one difference changes how cool a greenhouse runs, how evenly plants grow, and whether you spend the summer fighting heat stress. Here is when the reflective option earns its higher price.
A black shade cloth blocks light by absorbing it — the cloth itself heats up, and some of that heat radiates down onto the crop. Aluminet’s metalised surface reflects solar heat away instead, so a greenhouse under aluminet can run roughly 8–10°F cooler through the hottest part of the day.
The same reflectivity works in reverse at night: aluminet acts as a thermal blanket, holding warmth in and stabilising the temperature swings that stress sensitive crops.
| Aluminet (reflective) | Black shade cloth | |
|---|---|---|
| Heat behaviour | Reflects heat away | Absorbs heat |
| Daytime cooling | Up to 8–10°F cooler | Cools, but less at same % |
| Night insulation | Yes — retains warmth | None |
| Light quality | Diffused, deeper canopy reach | Blocks, little diffusion |
| Lifespan | 3–5 years | 5–10 years |
| Cost | Higher | Lower |
The honest summary: black shade cloth wins on price and outdoor durability; aluminet wins where cooling and light quality are the whole point.
Aluminet comes in the same range of shade percentages as black cloth — roughly 30% to 80% — and the right number depends on crop and climate, not colour. In a hot, high-radiation climate a 50–60% aluminet is a common greenhouse default; nurseries and young stock often start lighter, while temperature-sensitive flowers and premium fruit want more. Match the percentage to your light budget first, then choose aluminet or black on the cooling question.
For a cooler or mild climate, general vegetable production, or a tight budget, a standard black HDPE shade net remains the economical, longer-lasting choice.
Because aluminet reflects and scatters light rather than simply stopping it, the light that does reach the crop is more even and more diffused. That means fewer hot spots, less leaf scorch, and light that reaches deeper into the canopy instead of only the top leaves — which translates directly into more uniform fruit and flowers.
For the best cooling, mount aluminet outside the glazing or hoops, with a small air gap, so the reflected heat never enters the structure. Expect a service life of roughly 3–5 years — shorter than black cloth — and plan for it as a precision tool rather than a set-and-forget cover. Tell us your crop and climate and we will recommend the right shade percentage and whether reflective aluminum shade net is worth it for you.
See also our shade net vs aluminum shade net and the shade net color guide.
Yes — by reflecting heat instead of absorbing it, aluminet can keep a greenhouse roughly 8–10°F cooler through the day, and it retains warmth at night as a thermal blanket.
In hot climates and for temperature-sensitive, high-value crops, yes. For cooler climates, general vegetables or budget projects, black shade cloth is the more economical, longer-lasting choice.
Match it to your crop’s light budget and climate — commonly 50–60% for a hot-climate greenhouse. The percentage decision comes first; the aluminet-vs-black decision is about cooling.
Typically 3–5 years — shorter than black shade cloth. Mount it outside with an air gap for the best cooling and longest service.
Choose aluminet where cooling and light quality pay for themselves — hot climates and high-value crops — and match the shade percentage to the crop. Tell us your setup and we will spec the right aluminum shade net.
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