Wind & Shade Protection
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Shade & Shelter
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Wind & Shade Protection
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Shade & Shelter
Shelter Shade - 58%
Shelter Shade is a highly versatile and easy to erect, portable and reusable shelter fence. Ideal for the protection of ornamental plants in shade halls and other growing areas on commercial nurseries and garden centres. It is also used extensively for temporary or semi-permanent animal shelters and enclosures and is perfect for portable lambing pens.
Technology That Protects
The drive to improve horticultural crop yields and the requirement for high specification windbreak fencing has produced a range of robust and reliable shelter and shade products that meet the most demanding requirements. These cost effective and technically sophisticated products combine long life expectancy with ease of use and proven performance characteristics.
Advantages Thermoplastic materials offer many advantages over traditional
“grown” barriers.
• An instant protection after a short installlation period
• Scientifically designed to give maximum protection
• Mechanically robust and able to withstand sustained and shock loading
• Easy to move or relocate
• Offer varied porosity and geometry to meet site requirements
• UV stable
• Resistant to sun, rain, ice, snow and pollutants
• Pest and disease free
• Do not compete with crops for moisture and nutrients
• No roots to interfere with drainage or irrigation systems
• Minimum space utilisation
Benefits
These products offer a comprehensive range of benefits:
• Shade from the sun and night frosts
• Protection from hail and driving rain
• Protection of vulnerable structures
• Energy conservation
• Improved crop performance
• Avoidance of erosion
• Lowers moisture loss through transpiration
• Reduces leaf discolouration, wilting and burning
How windbreaks work & their benefits Reducing wind speed
Windbreaks interfere with wind flow producing an area of relative calm in their lee. The wind speed reduction achieved at a given sheltered point depends upon the height, width and density (porosity) of the windbreak.
• Generally, on level ground, windbreaks reduce wind speed by approximately 50% for up to a distance of four times the height of the windbreak and additionally by 33% for up to a distance of eight times its height.
• The minimum height for shelter is approximately two times the height of the item being protected.
• The minimum length of a windbreak is around eleven times the shelter height.
• The optimum porosity of windbreaks is between 50-60%.
• If porosity falls below 30% it will cause eddying and turbulence behind the shelter that may result in aerodynamic lift of particulate material.
• If porosity is too great wind speed will not be reduced enough to provide protection.
• Gaps underneath or between shelters are not recommended as they cause wind funnelling.
Reducing Energy Loss
Shelter and shade products reduce energy loss. Heat loss from glasshouses doubles as wind speeds increase from zero to fifteen mph. Other tests resulted in savings of between 5-25% in heating costs.
Reducing Structural Loads
Tests show that in severe winds the appropriate windbreak can reduce the worst structural loads by as much as 60% with a reduction of 40% obtained on average.
Wind tunnel tests with a 2m high windbreak show the relation between wind speed and distance from the fence.
Proven wind reduction performance – In trials, Rokolene Windbreak and Shade reduced wind speed by 70%. Using a three metre high windbreak the prevailing wind of 22mph was reduced to 7mph over a growing area stretching sixty meters from the windbreak. Consistent UV stability – A three year, hot climate, trial of Rokolene Windbreak and Shade recorded consistent levels of 50% shading, with no deterioration throughout the length of trial.
Growing Technologies
- Hartcliffe Way, Bristol BS3 5RJ UK Tel:
+44 (0) 845 260 4452
Fax:
+44 (0) 845 260 4451
