Large internal volume space, all cedar handmade, walk-in greenhouse, modular by design for easy expansion or move. This greenhouse accommodates any level of gardening experience. It comes with a heat-activated ridge-line auto-vent. They all use 8mm Twin-wall polycarbonate glazing, which comes with a UV coating with a 10-year guarantee against discoloration. Tested in the harshest of elements, and their greenhouse was voted best in the West by Sunset magazine.