Horticulturally, shadecloth has two (2) main specifications, light transmission and UVR block (or block out) that determines the successful growth of plants, foliage, flowers, and crops. Determining the balance is usually characterised by, where and what is being grown.

UVR Block

The percentage of Ultra-Violet Radiation, of wavelengths between 290nm and 400nm (see diagram), that is NOT being transmitted through the shadecloth. 

Light Transmission or PAR Transmission

Simply put, the amount of light transmitted passing through the shadecloth. Technically, Photosynthetically Active Radiation (PAR) is effectively the proportion of visible light (see diagram) passing through the shadecloth in the range of 400nm to 770nm. It is a measure of how much effective light would reach plants shaded by the cloth. 

Cover Factor

A measure of percentage area of the shadecloth covered by the yarns and fibres. This percentage is usually close to the UVR Block figure. 

Shade Factor (Shade Co-efficient)

The percentage of ultra violet and visible light, i.e. radiation of wavelengths between 290nm and 770nm (see diagram) NOT transmitted through the shadecloth.

Colour Range

Shadecloth Material comes in various colours. Black, White, Green, Beige being the most popular for growers dependant on the type of crop they are growing and conditions required. We also have a wide range of various other colours, in various blockouts & light transmission levels.


  Shadecloth Blockout Weight Av. % Light Transmission % UVR Block
Shadecloth X Light 30  Extra Light (30%)  
Black 69 71
Green 71 30
Shadecloth Light 50 Light (50%)    
White 71 54
Black 44 53
Green 50 52
Shadecloth Medium 70 Medium (70%)    
White 62 65
Black 33 67
Green 35 67
Shadecloth Heavy 80 plus Heavy (80-90%)

For further details contact us