Polyethylene Film 1. Can be applied in either single layer or double layer. Double poly film requires the installation of an inflator fan to provide air between the two layers.
Different grades are available and are rated as either one, two, three or four year film.
All high quality greenhouse film has a UV inhibitor co-extruded into the film. This will give you extra life before replacement is necessary. Many films are also available with an anti-condensate coating to prevent condensate drip on the inside of the greenhouse during humid conditions. Corrugated Polycarbonate 1. This is a hard plastic glazing material which approaches glass in its clarity and light properties.