Hothouses arch. As it was long ago. Even too long ago, when an ancestor has decided to wear a skin harvested animals, and from the search for the fruits and roots of thought up to go to their cultivation, unwittingly, he drew his eyes to the fact that, where there is an opportunity to comfort not only your body but also to plants. "It's interesting!" - Savvy primitive man-"I am on a chilly sensations under the dome of the earth, I bet it is cool and fruit growing in open ground. Do not planted them in the cave and create the right climate?" No sooner said than embodied. He dug a stone flower bed near his hoe bench, dropped into this place of corn, and looks began to wait for the result. But that's a shame!. Not grow his plants. It was too little light. And then it dawned on him. After processing the venison, which he brought from the hunt, were organs that can be dried and, displaying intelligence, applied to protect the premises, most importantly, the light does not experience great difficulty in passing through this barrier to the cold. In this way he solved the problem of scarce light-filled places of recreation. It was after this insight came the first sample of a greenhouse. Since the beginning of glass production began to erect a greenhouse covered with glass. These structures bring an abundance of light plants, which is very positive impact on their growth. Shortcoming of such a greenhouse is-smooth penetration of direct sunlight, and this leads to injury of seedlings, and, of course, to their deaths. And in terms of garden design, these objects have shortcomings: the glass is known to be brittle material, and so often happens to the replacement for the slightest indiscretion treatment, and this is very wasteful in no small cost. Get rid of these troubles helped cellophane tape. It is produced is of different thickness and sizes designed specifically for greenhouses. However, a significant drawback is its too-short life. Even the film, which has fittings may be small three years. It should be removed from the greenhouses at the time of frost, and with the arrival of spring again lay a greenhouse, spending much time at work with her. Out of this situation is made possible with the production of polycarbonate. Greenhouses, collected with the use of this coating were koordinalno differ from their predecessors. And cellular polycarbonate, without a doubt a great alternative to glass. Extraordinary ease possess cellular polycarbonate sheets. The air, which is available in the voids inside the sheet, gives it a very high insulation properties, and considerable structural strength it provides ribs. This has increased its impact strength, which is 170 times stronger than glass. Has he and high fire resistance: at high temperature melts the panel, but has no flame and does not emit harmful substances. All these excellent properties have given an excellent opportunity to use polycarbonate in the construction of greenhouses. By doing something a seal around the perimeter of opening parts greenhouses and at low temperature using a heating apparatus, you can use it in winter and summer. Incessantly can grow greens A beautiful view of improved greenhouses will give a great garden color and home comfort.