Work out shade net requirement instantly with clear inputs, formula shown and shareable results.
Shade net covers the roof plus all four sides, and a 7% allowance is added for overlaps at seams and for fixing margins at the ends. Dividing the total area by the roll width gives the running metres to order, since net is sold by length in a fixed width.
Net area
Area = length x width + 2 x (length + width) x side height, plus 7% for overlap and fixing
Roll length
Roll length = total area / roll width
35-50% for most vegetables and nursery work, 50-75% for shade-loving ornamentals and ginger, and 75%+ only for propagation. Too much shade causes weak, leggy growth.
Green and black nets mainly cut light intensity. White and pearl nets scatter light more and keep the canopy cooler for the same shade factor, which suits high-radiation regions.