This is made with a heavy-duty extruded resin frame for improved insulation and durability. Virtually unbreakable twin-wall polycarbonate glazing creates a comfortable growing environment and diffuses light for even plant growth. The translucent, twin-wall polycarbonate panels also create superb, lightweight insulation. The weatherproof frame on the Grand Gardener 2 features simplified assembly with the pin and lock system while the roof panels now simply slide into place. A barn-style roof design provides ample headroom and gives you more space to garden. Double doors allow easy access and provide excellent ventilation. The included roof vent provides additional ventilation. Secure to a concrete pad or heavy timber foundation. The optional base kit may be added for additional height and extra stability.