Patio GardenhouseBuilt here in the Pacific Northwest! Weve looked at a lot of cold frames, and the Patio Gardenhouse is by far the best. This roomy, rugged structure will weather many seasons for seed starting, season extending and overwintering more tender plants. Build of the best quality materials: solid redwood frame, double wall polycarbonate, durable, and composite decking for the sill plate. Every corner is reinforced for strength and stability. Four, heavy