Glass greenhouses - time-tested, reliable and aesthetically pleasing option of a truck crops ideal conditions for growth and development.The cost of construction and its installation depends on the materials used, dimensions and whether the site owner to buy a greenhouse, or to produce it himself.
Historical data on greenhouse
history of growing vegetables using artificial methods of farming dates back to very remote times.Ancient gardeners planting carried in the sun during the day and removed at night in a warm room, constructed a kind of greenhouses, covering a bed layer of manure under which retain heat.
Over time, the same ancient Romans invented to protect planting fences covered with thin slices of mica, let in the sunlight.These buildings and can be considered the prototype of modern greenhouses.
first greenhouse glass appeared in Europe in the mid 16th century.They are mainly used for the cultivation of flowers and exotic plants.The glass was very expensive, so that ordinary people could not afford such a luxury to grow vegetables.
invention is a method of creating flat glass in the 17th century in Germany has led to the development of the construction of greenhouses.Nevertheless, the privilege of having a greenhouse made of glass possessed wealthy citizens.Only in the early 20th century, when there was a massive rolled sheet glass and the price for it has fallen sharply, the opportunity to build glass greenhouses appeared at all.
glass greenhouse in Russia appeared under Peter 1 and also a rarity, since their construction cost is too expensive.In the 30s of the last century, the mass construction of greenhouses on a national scale.Soviet greenhouse complexes supplied with fresh produce all over the country.
advantages and disadvantages, which have glass greenhouses
Glass has some positive qualities, causing its use in the manufacture of greenhouses:
- High transparency allows sunlight to penetrate freely into the greenhouse.
- Ability to pass ultraviolet rays gives plants the ability to obtain the necessary elements for growth.
- Ecological and chemical inertness of glass provide a healthy atmosphere in the greenhouse.It does not release harmful substances when heated, and does not respond to the action of chemicals and aggressive environment impact.
- The surface of the glass is not subject to aging and abrasion therefore a long time retains an attractive appearance.
- glass structure does not change under the influence of high and low temperatures.The shape and dimensions remain unchanged, which eliminates deformation of the structure.
- Does not require complex care.To the glass is clean enough to wash it with water and wipe with a dry cloth.
- weather resistance, and does not bend under the weight of snow.
- Frustrated element is easy to replace.
glass Disadvantages include high weight, fragility, high thermal conductivity, high price compared with other materials used to cover greenhouses.Even with these apparent disadvantages of greenhouses (customer reviews confirm this) do not lose their popularity.According to those who have long enjoyed a glass greenhouse in their area, the cost of paying off a couple of years, as the vegetables grow and develop in them a lot better.Construction firm, and damaged components can be replaced quickly and easily without disturbing the climate in the greenhouse.
Features technologies for creating greenhouses
Any greenhouse, regardless of the materials used, a strong skeleton, covered with sheets of transparent material.The frame is made of aluminum or steel profiles or wooden bars.For glass greenhouses used usually aluminum or wood, to reduce the overall weight of the structure, since the glass itself is quite heavy.
For the same reason for setting greenhouse glass needs a strong, solid foundation.For greenhouses typically use tape or monolithic concrete foundation block.Lay it must be to a depth of soil freezing, but not less than 80 cm.
usually made of glass greenhouses with a saddle or pent roof sloping.Here the choice can make himself the gardener.To a glass roof greenhouse served as a long time for its production using glass thickness of 4-6 mm.Thicker may crack as the temperature difference inside and outside can be very large.
greenhouses glass - a decent selection
glass greenhouses and today does not lose its popularity, although there were other materials having similar characteristics and higher technical and physical properties.
Despite the fact that the sale is a huge variety of models of greenhouses made of different materials and a different price category, true connoisseurs prefer reliable, durable and attractive exterior design of glass.The price of the greenhouse frame under glass depends on the size of the design, materials used, and the presence of additional elements.On average, it varies from 20 000 to 150 000 rubles.The cost of flat glass thickness of 4 mm - 150 rub. / M.Despite the high cost greenhouses, reviews of the finished structure, commercially available, for the most part positive.They should listen novice gardeners.
Experienced growers usually choose glass greenhouses, the price of which is quite high, knowing that the quality and reliability of the design in the end will pay all the costs.