Stuppy Greenhouse Blog

Greenhouse Glazing

Posted by Phil Bishop on Jun 19, 2017 9:00:00 AM

What materials are most commonly used for glazing commercial greenhouses?

  • Type 1: Thin plastic films, generally ranging from 2 to 8 mils (.002”‐.008”), normally installed using two layers with air inflation between the layers to provide added insulation. Specific types of films: ethylene vinyl acetate (EVA), polycarbonate (PC), polyester, polyethylene (PE), polyvinyl chloride (PVC), and polyvinyl fluoride.
  • Type II: Rigid Plastic panels such as single layer corrugated polycarbonate and fiber glass‐reinforced plastic (FPR); multi‐wall acrylic, impact modified acrylic and poly carbonate
  • Type III: Rigid Glass materials including annealed, tempered and laminated.

This article is brought to you by the NGMA

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Topics: greenhouse covering

Unclog the Energy Drain

Posted by admin on Feb 16, 2015 1:42:46 PM

When considering expanding your grow space there are a thousand things to consider. We’re going to tackle five different solutions. As we know, energy costs are a large drain on the profit margin, but there are other options to consider instead of, “that’s how we’ve always done it.” For example, at Laughing Stock Farm, in Freeport, Maine, the owners have switched their heat source to cooking oil from local restaurants. The restaurants give the oil away because otherwise they have to pay to have it removed. Great idea, right?

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Topics: storing heat, greenhouse covering, hot water heating, plant root heating, water heat storage, reduce air leaks in greenhouse, non conventional, retractable shade, save money, increase crop production, greenhouse heat, greenhouse maintenance, save energy, greenhouse energy costs, energy costs, seasonal greenhouse maintenance, delta t, insulating the greenhouse, greenhouse shade

Recommended Practices Concerning Film Greenhouse Covering

Posted by admin on Feb 10, 2015 2:56:29 PM
  1. Except for greenhouse covering expressly known to be manufactured for greenhouse use, no polyethylene or other film should be used as glazing, for covering any greenhouse or for any similar purpose.
  2. Single layers of film may not be sufficiently resistant to wind stress of impact. Therefore, it is recommended that two layers, air inflated to .2-.3 inches of water pressure measured on a manometer be used. Outside air should be used for inflation because of its lower cold weather moisture content. Inflation air should not be directed perpendicularly or nearly perpendicularly at the film but obliquely to it.
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Topics: greenhouse covering, maintaining greenhouse plastic, maintaining greenhouse, inflating greenhouse poly, poly greenhouse, replacing greenhouse plastic, treating greenhouse plastic, greenhouse inflation, double poly installation, greenhouse maintenance, double poly, replacing poly, plastic greenhouse

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