Greenhouse Construction
At Geotechnology since the 1980s we monitor and apply the latest technologies in the construction of greenhouses and we are pioneers in the application of new techniques and in the construction of the most modern types of greenhouse.
At the moment, Geotechnology undertakes the design and implementation of the most modern and widespread types of greenhouses, following the latest standards, which impose high ceiling heights and large arch openings.
Greenhouse Types
Greenhouse Covering
Venlo Type Greenhouses
The VENLO type is the most modern type of glazed greenhouse that is currently used in countries with a dynamic presence in the field but also in the largest and most advanced projects around the world.
The advantages of Venlo Greenhouses are summarized below
- The construction can reach great heights, which means greater air volume, better micro-climate and optimal plant growth conditions.
- High photo-permeability, due to the geometry of the roof and the aluminum profiles.
22 ° roof slope, which minimizes the accumulation of condensate. - Unlimited shelf life of the cover material (Glass) in relation to plastics
- High resistance to snow and wind.
- Better ventilation with skylights.
It is worth noting that all the newest and most innovative technologies are being developed and applied first in Venlo Greenhouses, as they are models of modern cultivation.
Gothic Type Greenhouses
This type combines all the advantages of arched greenhouses with those of triangular ones and is the most common solution in modern greenhouses with plastic cover.
The advantages of this type are:
- Due to the high height of the gutter – the top has a large volume of air, this implies a better climate in the greenhouse which means better plant growth and production.
- High photo permeability due to the way the frame is constructed and the large openings, which reach 16.2m.
- Roof inclination at 29 °, which reduces the likelihood of accumulation of condensate and drainage from the film into the crop.
- Resistance to snow loads, crop suspension and suspension systems (heating pipes, cables, etc.).
- Suitable shape to accept almost any covering material such as single or double film (Inflatable), polycarbonate single or honeycomb sheets, metal sheets etc.
- Maximum peak height at 9m.
Arched Type Greenhouses
Arched greenhouses are a conventional solution for modern construction. They remain on the market as simpler and more economical constructions, without being deprived of durability, while the internal volume remains satisfactory.
They can be constructed with high gutter heights, up to 6m and spans up to 12.6m.
The advantages of this type are:
- High Photo permeability
- Resistance to snow loads, crop suspension and suspension of systems and equipment (heating pipes, cables, etc.).
- Suitable shape to accept almost any covering material such as single or double film (Inflatable), polycarbonate single or honeycomb sheets, metal sheets etc.
- Less complex construction and easier coverage
Tunnel Type Greenhouses
The simplest constructions in greenhouse crops, consist of autonomous tolls or tunnels, in the desired lengths. Their width ranges from 5 to 10 meters, with a maximum height of 2.70 to 3.70. Their construction does not require support columns, while the fronts can be completely open.
Despite the simple construction, it is possible to install ventilation windows at the top (opening with hangers) and laterally (Roll-up type).
The advantages of this type include the simplicity of construction, the limited cost, the high resistance to storms (if it is constructed with closed fronts), the flexibility in crops but also the use as well as the low maintenance requirements.
Greenhouse Covering Materials
During the initial stages of design and investigation of a project, the next most critical element, after the type of greenhouse and its dimensions, concerns the cover material that will be selected.
With the exception of glazed greenhouses, all other types of greenhouses are covered with synthetic materials or metal sheets, when it comes to workplaces.
In all our projects, we choose synthetic greenhouse cover materials certified with the latest specifications required, such as:
- UV protection
- Resistance and protection against chemicals (Sulphates and chlorides)
- Low thermal conductivity
- Ensured photo-permeability, with or without diffusion
- High mechanical strength
- Long life time
The provision and assurance of consistent quality, specifications and warranty that we provide to our Customers, is a cornerstone in all our cooperation, so for the supply of all coverage materials, and not only, we work exclusively with Greek and European companies.
Cultivation Area Covering
During the initial stages of design and investigation of a project, the next most critical element, after the type of greenhouse and its dimensions, concerns the cover material that will be selected.
With the exception of glazed greenhouses, all other types of greenhouses are covered with synthetic materials or metal sheets, when it comes to workplaces.
In all our projects, we choose synthetic greenhouse cover materials certified with the latest specifications required, such as:
Polyethylene Film Multilayer
From 3 to 8 layers which give the desired properties to the film, such as, instead of dripping, anti-fog formation, thermal insulation, chemical and mechanical strength, multi-year duration, etc.
Polyethylene film Multilayer cellular
Specially developed cover films with excellent thermal insulation properties. They are made of multiple layers between which tiny air pockets are created. At the same time, they retain all the properties of multilayer films.
Polyethylene Knitted Film
Made of cross-braided strips, and laminated on one or both sides. Extremely durable and low elastic material, mainly for perimeter coverage (Aprons)
Polycarbonate honeycomb sheets
For perimeter and roof covering of high thermal insulation, with UV protection, in transparent and milky shades. Thicknesses start from 3mm to 10mm.
Polycarbonate Corrugated / Trapezoidal sheets
For perimeter and roof covering, with UV protection, in transparent and milky shades. Thicknesses start from 0.8mm to 1.5mm
Service Area Covering
During the initial stages of design and investigation of one To cover workplaces, pumping stations, boiler rooms, etc. Most of them use opaque materials or materials with low light transmission.
It is also tempting to place in workplaces and boiler rooms, single cover materials
- Polyethylene film multilayer opaque (Green-white, black-white, white etc)
- Polycarbonate milky leaves Honeycomb or corrugated.
- Trapezoidal metal sheets
- Polyurethane panel, “sandwich” type