Gardeners build on the country sites greenhouses for cultivation of thermophilic cultures, for example cucumbers, pepper, tomatoes. This design consists of the base and translucent material. At construction or reconstruction of the greenhouse there can be questions concerning cover material, sometimes it is so hard to make choice.
Greenhouses can be separated conditionally on seasonality of use, that is the design can be winter and spring. In the first case for covering it is the best of all to use polycarbonate or glass. In the second case you can stop the choice and on film.
The most economic option is, of course, film. But if to look on the other hand, you will not call it cheap material, the term of use its rather small. Under the influence of sunshine, the atmospheric phenomena the film covering quickly collapses. Therefore, it is necessary to update film very often. Besides in the winter this material will not be suitable for cultivation of plants.
You can cover the greenhouse with glass. But also there are minuses though much less, than in the previous case. Glass can break, and there is it much. More favorable option for covering of greenhouses is cellular polycarbonate. Of course, there is it decently, but do discount for its durability. Granules of ultra-violet stabilization are added to this material, at the expense of it polycarbonate it is possible to beat even with the hammer. Also he carries very well out heat therefore it can be used for winter greenhouses. Besides it is fireproof, from this it is possible to draw conclusion that the greenhouse can be heated even the oven (cellular polycarbonate maintains temperature to +120os). It is possible to carry to pluses also that cover material perfectly passes light (to 86%). Also it protects plants from influence of ultraviolet. However when using polycarbonate there are also shortcomings. For example, the greenhouse covered with this material has bad ventilation, and it can harmful affect plants. Making the choice, you proceed from personal preferences and conditions. Perhaps, someone in the old manner will cover the greenhouse with glass, and someone will try new technologies.