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Not all greenhouse upgrades are necessary, but some make a big difference. Buyers love features like automatic vents, polycarbonate glazing, and airflow add-ons that make gardening easier, more efficient, and more enjoyable.
Polycarbonate glazing is an ideal greenhouse choice for gardeners seeking superior insulation, light diffusion, and impact resistance—especially in colder or extreme climates—offering energy savings, durability, and design flexibility over traditional glass.
When choosing a greenhouse, on of the key decisions is selecting the right glazing material. The choice between glass and polycarbonate glazing impacts insulation, light diffusion, and durability. While glass remains a timeless and aesthetically pleasing option, polycarbonate has gained popularity due to its strength, energy efficiency, and versatility. If you're considering polycarbonate for your greenhouse, here's what you need to know about its benefits and suitability for different gardening needs.
Fivewall polycarbonate is a durable, energy-efficient glazing option with high insulation (R-value 3.03), 62% light transmission, and excellent structural strength—making it ideal for cold climates, snow loads, and year-round greenhouse gardening.
BC Greenhouses has been working with this glazing product for a few years. It was so impressive in terms of its energy efficiency that we built a new aluminum framing system to accommodate the wider profile. For example, a typical single glass greenhouse glazing is 3mm in thickness whereas the Fivewall polycarbonate is an impressive 16mm.
Installing a UV-stabilized shade cloth over your greenhouse in late spring reduces heat buildup, lowers pest pressure, saves water, and protects plants—especially in polycarbonate or glass structures—while offering seasonal flexibility to match changing light and temperature needs.
I’m sitting in my greenhouse sipping a cool drink as I look outside. With the current heatwave this is positively the coolest spot in the garden right now. But it didn’t use to be that way. Scorched leaves, dry soil and wilted, bolting lettuce used to be the norm.
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How Do I Choose the Right Glaze Type for My Greenhouse Environment?
The ideal greenhouse glazing depends on your climate and growing goals: single glass with polycarbonate works for cool-season overwintering, fivewall polycarbonate offers superior insulation in colder climates, and double or low-E glass creates energy-efficient, year-round hot houses. Matching your glazing to your intended use—cold house, warm house, or hot house—ensures optimal plant performance, heat retention, and light transmission. Understanding your grower profile helps you select the right materials and create the perfect controlled environment for your plants.
When prepping your greenhouse plans there are many considerations including your glaze type effecting your greenhouse environment.
