Glass used in greenhouse construction - tempering is a must, scattering is the key

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Glass used in greenhouse construction - tempering is a must, scattering is the key

Glass greenhouses are currently the highest-standard greenhouse type among modern agricultural greenhouses. The surface of the greenhouse is entirely covered with glass. The appearance is crystal clear, bright and clean, and the interior of the greenhouse is extremely light-transmissive. With vertical planting or hydroponic technology, it can grow in a limited space. Within the greenhouse, the results can be several times greater than those of other types of greenhouses.


Nowadays, in the construction of glass greenhouses, the main consideration is the choice of frame and glass:


In the design of aluminum alloy profile components, in order to improve the strength of the aluminum alloy, the selected series are high-quality greenhouse special profiles. The aluminum alloy profiles are manufactured in accordance with the national standard "GB/T 5237.15237.5-2000 Aluminum Alloy Building Profiles". The main stress-bearing components It is 6061 high strength aluminum alloy. In the process of selecting aluminum alloy material components, it is best for growers to choose manufacturers whose surfaces are anodized and whose oxide film thickness strictly complies with national standards.


The greenhouse side wall glass generally uses ordinary insulating float glass, and the specification is 5+6+5 ordinary float glass.


The greenhouse loses a lot of heat from the envelope structure and cold wind penetration in winter (accounting for 70 to 80% of the greenhouse heat loss). Practice at home and abroad has proven that improving the thermal insulation and sealing performance of the greenhouse enclosure structure, especially improving the thermal insulation performance of the greenhouse covering material and the air-tightness of the profile, is the most economical and effective way to prevent greenhouse heat loss.


The best covering material for the top of the greenhouse is 4mm tempered scattering glass, with a light transmittance of over 91.5%.


The 4mm glass greenhouse is equipped with special aluminum profiles and anti-aging rubber sealing strips, which have good sealing performance, are beautiful and durable. Tempered glass has excellent comprehensive properties of strength, rigidity, hardness, toughness, crack resistance and good light transmittance.


Modern greenhouses are mostly used to grow fruits, vegetables, flowers, medicinal materials, etc. Because of the vertical farming method, the height of the greenhouse design is generally between 5-7 meters (7 meters is about as high as a 3-4-story building).



Faced with such a high greenhouse, the first consideration when selecting profiles for the greenhouse top covering glass is safety, so the use of tempered glass on the top of the greenhouse is an inevitable choice. Strong natural disaster weather in very few areas can easily cause the glass on top of the greenhouse to fall off or burst. The sharp edges of broken non-tempered glass can easily injure workers and crops below the greenhouse.


The second consideration is the scattering effect. Greenhouses are grown all year round. Cooling and insulation are the primary considerations in planting operations. Temperature control also accounts for a lot of expenses in the year-round operation of the greenhouse. The top of the greenhouse is made of 4mm tempered scattering glass with a maximum light transmittance of 97.5%, so we dont have to worry about the effects of insufficient light.


The unique astigmatism design can change the sunlight entering the greenhouse from hard light to soft light (turn a point light into a patch of light), which greatly prevents light from burning the surface of crop leaves. In the hot summer, diffused glass can ensure that the average temperature inside the greenhouse is reduced by about 5 degrees Celsius (a money-saving tool).


According to the different haze values of tempered scattering glass, it can be ensured that there are suitable glass types to choose under different temperature differences and lighting conditions.


Attached are the main technical parameters of the glass greenhouse:


Top glass 4mm tempered diffuse glass


Side wall glass 5+6+5mm ordinary float insulating glass


Heat transfer coefficient 3.3W/m2.c




No breakage or cracks in impact resistance test


Softening temperature 200


Artificial climate aging test for 5,000 hours, the light transmittance decreased by 0.1%


The service life can reach more than 25 years


Today's glass greenhouse construction is now mature, and representative projects abound. On our Yuhua official website, we can see the use of Yuhua Glass in various large and small projects at home and abroad. It is precisely "practice makes true knowledge", The majority of customers choosing our Yuhua Glass is the greatest affirmation of our Yuhua.