Tholen – Make the right choice once for a screen cloth and then ‘roll out’ this installation in phases over all your greenhouses. That is what Rick Tesselaar has chosen. In 2017, Rick started thinking about his screen choice. He knew exactly what he wanted: one canvas. And that cloth had to be energy-saving and serve as a sunscreen on hot days and meet the guidelines for light emission during the period of exposure.
Contrary to the trend of installing two or three canvases one above the other, Rick has found his canvas that meets these three requirements. The first phase was completed in 2018. In the meantime, almost completely screened with PhormiTex 77 from Phormium in the 10 hectares of glass. This year the last meters will be taken care of. Rick Tesselaar: “Of course we measured and assessed the performance of the screen after the first phase was installed. We had no complaints about that. There was no reason to go back to the screen choice for the following phases.”
Fortunately, it went well, because Rick does not want to make the work for his cultivation manager unnecessarily complicated. “There are already so many variables. One screen for all three locations is easy to control.”
Sheep with five legs
Rick: “This fabric is the golden mean for us. It can be used for many purposes. This is the optimum for us; the result and costs have been weighed up. We use PhormiTex 77 in the summer as a sunshade, at night as a light screen and in winter as an energy screen.” On hot days, it closes the canvas for 60%. We meet the light emission requirements; we can close it well at night.” And the aluminum strips of this woven fabric counteract radiance. That was important for Rick. Because if the radiance is too high, the heads can get too cold and they can pop off. That’s what the grower wants, of course. not: “Those aluminum tracks are a godsend for this.”
Arjan van der Veer of Phormium adds with a laugh: “Rick puts it well. One thing is worth mentioning: the aluminum strips in the PhormiTex line retain the heat better in winter, but in summer they are they are also cooler due to better reflectivity than the white straps.”
As a grower, Rick was advised by colleagues and by his permanent screen installer. Huisman Scherming is their cloth specialist. Rick was in contact with Dave Boer about screen selection and installation. “The great thing about Dave is that he gives clear and good advice. He sincerely helps you find the best solution. That’s nice.”
Tesselaar Alstroemeria annually produces more than 36 million stems under 10 hectares of glass. And therefore belongs to the larger alstroemeria growers. The different types of alstroemerias are grown at three locations in Luttelgeest. They deliver to wholesalers, retailers, supermarkets and have a cash & carry. They agree the method of delivery with the customer.
The company is led by Rick and Karolien Tesselaar. They are a bit quirky, as they write on their website, and like to chart their own course. Rick: “There is a large market for alstroemerias. We consciously build our organization with well-qualified personnel. Growth should not be limited by people. That is why the qualifications of our personnel are absolutely leading. Our company must continue to develop. system must be stable.”
An ideal choice for sun-shading in wide span greenhouses
A rolling roof screen gives you extensive control possibilities. It permits both two and one-sided screening. For example, just on the sun side, so that burning is prevented. Or just on the cold wind side, so that you save on heating costs during the day while your crops keep on growing. The screen sections can be controlled separately for aeration purposes, so that your greenhouse is always ventilated. Our advisors can help you choose the right fabric foryour crop as well as the optimal installation possibilities.
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