There are many variables to consider when selecting the “best” glazing material for your greenhouse. Clearly, double-pane (or triple-pane) glass is the best quality, especially when it includes argon-filled gas and Low-E coatings. Single-pane glass is significantly less expensive and looks just as nice as double-pane, but is less energy efficient and will cost more to heat in the winter. Triple-wall, high-clarity polycarbonate is a good option for greenhouses that do not require the appearance of clear glass. This polycarbonate glazing is nearly as energy efficient as double-pane glass and it diffuses the light better than glass. It is the “best” option for cost-effective, functional greenhouse growing.
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