Why Some Polytunnels are Whitewashed & What Does it Actually Do

1. Why Some Polytunnels are Whitewashed & What does it Actually Do Whitewashing polytunnel coverings is very common practice amongst lots of growers and increases good light reflection inside the structure, creating a more favourable environment for the growth of certain crops. Growers can do this on clear, white and opaque polytunnel coverings. The main reason for whitewashing any polytunnel is to offer an increase in light reflection within the structure. By whitewashing, the side walls and roof of the structure with a white paint or whitewash solution. This helps to create a better reflective surface, which can add to the amount of light that can enter, providing a more favourable environment for the growth of crops. Another good reason for whitewashing is to provide better protection from the sun's UV rays. When polytunnel coverings are whitewashed, they provide a barrier that can help to reduce the amount of UV rays that enter the structure, which in turn helps protect crops from any sun damage. Whitewashing polytunnel coverings can reduce the amount of heat that builds up inside the structure. Once whitewashed, they reflect more light in which can help to keep the

2. temperature inside the structure cooler, also you may have noticed extra ventilation panels or flaps on whitewashed coverings. This also helps in reducing the amount of heat stress that crops are exposed to in the summer. Reducing the amount of condensation that builds up inside the whitewashed covering. Condensation can be caused by the difference in temperature between the inside and outside of the polytunnel, and can be quite a problem for the growth of crops. When the walls and roof of a polytunnel are whitewashed, they reflect more light, which can help to reduce the amount of condensation that builds up inside the structure. Condensation can cause mould and that will attract pests and insects that can cause severe damage to crops. So, by offering a covering a whitewash, or appropriate solution, does offer growers quite a few benefits, but once you do this you will have to keep it up. With the proper spray tools this is easily achieved and alongside good maintenance and regular checks, your polytunnel cover will last a lot longer. Extra netting or covers inside can also be beneficial for certain crops but you do need to know what types of crops need this added layer, to reduce heat builds-ups. To finish; Whitewashing can provide many additional benefits for crops grown within it, including increasing light reflection, providing protection from the sun's harmful UV rays, reduce heat stress, and condensation. It is important to consider all of these benefits when deciding whether or not to whitewash a polytunnel and to choose a whitewash solution that is safe for use on polytunnel coverings and the different types of polythene used. Additionally, it should be properly applied and maintained to ensure the best results. Ensure when cleaning any polytunnel covering that the solution you use will not affect the protective nature of the cover and is harmless to plants. Read More: Are Polytunnel Construction Services Expensive What Cover Should I Choose Do Polytunnel Installation Companies Employ Skilled Staff