For the arrangement of greenhouses manufacturers offer the consumer various materials. Along with the traditional raw material for mounting the frame, such as glass or film, there are the latest generation materials that have proven perfectly in practice. Such products are polycarbonate, widely used lately.
Features and species
Most of the gardeners and gardeners are no longer asked about what material to acquire as underfloor raw materials for greenhouses and greenhouses, since preference is given to precisely polycarbonate. But sometimes the buyer is facing the choice, which relates to the type of material, because on the counters of supermarkets, this product is represented by a large manifold. The task of the buyer is to purchase an optimal option based on the cost and quality of goods.
Polycarbonate is a plastic made on the basis of polymers.
As a positive features of raw materials, you can allocate:
- minimum weight and ease of installation;
- flexibility and strength;
- environmental friendliness;
- Resistance to temperature fluctuations and excellent thermal insulation properties.
The combination of the above qualities was the reason why the material became very popular and in demand in many areas of activity, including the shelter of greenhouses.
By its structure, raw materials are classified for two types:
- monolithic products;
- Cellular polycarbonate.
Based on the title of the first type of material, it can be noted that it only happens in the form of solid sheets, with different thickness and size of the product. And due to heat treatment, the necessary configuration can be set, which is very important for the construction of multi-level structures.
The distinctive advantage of the monolithic material is its strength, exceeding a similar indicator in more than twenty products. Which allows you to apply it for construction purposes without additional build assembly. The color of the monolithic polycarbonate varies from colorless sheets to materials of all sorts of shades. As an injection raw material for greenhouses, it is not as often as often because it has a rather high cost.
The right solution for the arrangement of greenhouses from polycarbonate will be a cellular material that has a number of positive qualities. It is very important to carefully understand the presented assortment of this raw material, since the functionality of the whole design and its operational period will be directly dependent on the choice of the choice in favor of this or that type of polycarbonate.
Advantages of cellular structure
The material has many advantages, in comparison with the rest of the products used for the construction of greenhouses:
- Excellent Svetopropuscability of raw materials;
- low weight;
- the presence of a coating that protects plants from ultraviolet radiation;
- Air layer in cells favors thermal protection;
- low cost in contrast to monolithic type;
- long service life;
- resistance to different temperatures;
- does not carry out electricity;
- not subject to corrosion and rot;
- good plasticity and thermoplasticity of products;
- Responsible recycling.
The consumption of products include low resistance to the effects on the surface of abrasive substances and cyclic expansion due to temperature changes.
There are lightweight types of cellular polycarbonate, which are characterized by more subtle partitions inside. The cost of such a material makes it possible to save on the purchase of building goods.
Characteristics and parameters
First of all, polycarbonate is highlighted by its strength, if compared it with other underfloor materials for greenhouses, for example, with glass or polyethylene film. The temperature range at which it does not lose its properties is: from + 120c to -40c. Cellular polycarbonate in its structure is the following types: 2R, 3R, 3RX, 5RX, 6RS.
This indicator as density is a very significant parameter for the material. It depends on the shape of voids in a sheet of cellular polycarbonate. The highest indicator is observed in material with triangular and hexagonal cells. Such a feature provides a product good resistance to strong wind gusts, but the flexibility of products is reduced.
Rectangular cells are present in a more budget type of polycarbonate, it is characterized by excellent flexibility.
Manufacturers offer products with the following thickness: 4, 6, 8, 10, 16 mm or lighter products, this parameter for 3-3.5 mm.
Obtained sheets with 20 to 32 mm thick, used for structures where a special level of coating strength is important.
To equip a private greenhouse, experts advise to stop their choice on the optimal material thickness of the material, component 4 mm. This indicator will allow the Teplice to effectively cope with its functional tasks of about 3-4 years. Thick panels for greenhouses should not be used, as they will reduce the light-paintability and thermal conductivity of the product, together with the need to improve the enhanced frame.
For climate, where harsh weather conditions occur, the raw materials of 6 mm thickness should be purchased. Such sheets do not ruin even from hail and strong wind.
Sheets having 16 mm thickness showed themselves better when performing vertical walls of pools or other sports buildings.
When building the greenhouse, it is necessary to take into account a number of mandatory factors, based on which the specified amount of materials will be purchased. Purpose of the structure: the greenhouse will be used only in spring or in the winter, too, its size, load on the walls and so on. As for the size of the cellular polycarbonate sheet, there are uniform standards relating to these parameters, both in domestic and foreign manufacturers, regardless of the selected thickness.
The size of the sheet must be 2.1×6 m or 2.1×12 m.
Monolithic polycarbonate is manufactured in size: width 2.05 m, length 3.05 m.
Consumption is largely determined based on the rational cutting of the material.
Foreign and domestic firms that specialize in the production of cellular polycarbonate offer the consumer completely transparent or painted products. To properly pick up the color of the panel for the greenhouse, the solution should be made, relying on certain criteria.
The surface of the structure should provide high-quality light permeability for plants so that the lighting was similar to the natural sunlight. Colorless products fully copes with the task. Such products have the value of this parameter at 80%. And, for example, a sheet of cellular polycarbonate Color opal dispels only 40% of sunlight, bronze tint – 60%. Such values will negatively affect the growth of plants, since the lack of light will lead to a slow development or death of seedlings.
Therefore, experts advise:
- acquire transparent materials for greenhouses that will provide good crop yield indicators;
- From the choice in favor of blue or turquoise panels, it is worth abandoning at all;
- Yellow polycarbonate can be chosen for areas with a mild climate;
- If artificial lighting is planned for structures, then the underfloor material can be of any color;
- Mushrooms and berries grow perfectly in coated rooms made in green, red or brown color scheme.
The need for UV protection
In the course of operation of transparent plastic on the material, the effect of intensive ultraviolet radiation occurs, which is fraught with the formation on the surface of the microcrack due to the activation of photovoltaic destruction processes. However, this is only the first alarming bell, in the future such, it would seem, invisible and non-serious defects increase and spread across the area, as a result of which the sheet becomes brittle, and it gradually collapses.
To secure the material from such devastating phenomena, A special protective coating is applied to the top layer of polycarbonate in the process of its manufacture. And the modern technology of coextrusion, which is used in the course of these works, makes it possible to eliminate the risk of a gradual separation of the layer from the ground.
Almost the entire range of cellular polycarbonate has such a coating on one side. To install the material in the greenhouse in the right side, the manufacturer makes a special label on the film used for packaging that will tell you how to lay a product.
There are some types of products where the stabilizing coating is applied on both sides. This product has a narrow scope: for the most part, it is purchased for the installation of advertising structures or tape-absorbing shields, the installation of which is universally carried out along the transport highways located near the settlements. Such products are not needed to improve greenhouses, because only one side is in contact with UV radiation.
Today, the market contains panels from cellular polycarbonate, which have no protective layer, and protection is ensured by a special composition comprising an additive that performs this feature. This product indicates its percentage, usually it is 30-46%.
Some manufacturers implement polycarbonate without protective application. It can only be used for internal work, which eliminate direct surface contact with sun rays, so it is impossible to use such products for mounting a greenhouse design. By purchasing such panels of cellular polycarbonate by negligence, you can expect that the construction will last a maximum of one year. Destructive processes will not make themselves waiting for a long time that is fraught with serious trips relating to the acquisition of a new underfloor material.
Therefore, for the construction of greenhouses will be suitable polycarbonate only with a protective film from ultraviolet from proven and popular trading companies or manufacturers. Buying products on which the manufacturer is not likely indicated, will most likely be a mistake that will seriously hit the budget.
Recommendations for choosing and reviews
European manufacturers argue that premium polycarbonate material can successfully operate about 20 years. Consumer reviews indicate that competent and correct operation makes it possible to maintain their effectiveness throughout the specified period. As for domestic products, their average service life varies within 8-10 years. Chinese analogs come into disrepair twice as fast as the raw materials for their release serves secondary material.
Based on this, give preference to well-known firms, who are monitoring the quality of their products, because it will go to our name on the market. You can distinguish good products from poor quality with the help of a visual inspection of packaging: as a rule, proven manufacturers make marking on the front side of the sheet, which contains information about the parameters of the product, including the production date.
Products on both sides should be packed in the film and do not contain visual defects and scratches. The surface of the product must be homogeneous in color, without bends and do not contain bubbles. We will not be asked to familiarize the quality certificate for the material, since many unscrupulous firms easily fake well-known logos and apply them to their low-quality products.
However, the service life of products is largely determined by the right installation and selection of consumables, For example, for the crate. The diameter of the holes under fasteners must be carried out more than the bolt itself to reduce the risk of material cracking in these places at temperature deformations of the surface. We will optionally use rubber puck.
Polycarbonate panels are attached to a special profile. Open ends of the sheet must be closed with a steamproof profile, which will provide a moisture protection function and will exclude the risk of clogging by various particles the inside of the sheet. The lower edge does not need to arrange a profile, it is usually left unclosed so that the condensate can flick from the surface without obstacles.
Competent installation of underfloor material on a constructions in a combination with a properly selected material, including thickness, size, color and manufacturer, will serve as a guarantor of long and productive functioning of the greenhouse. What will provide a good level of yield and high quality product.
As well as stationary or nationalized greenhouse design can be ordered from the manufacturer directly, which will avoid errors related to the installation and acquisition of building materials.
On how to collect a greenhouse from polycarbonate, see the following video.