The RIGA is truly a greenhouse by the European definition of a greenhouse - designed to be used to grow fresh vegetables herbs and flowers in the middle of winter. While other so called greenhouses using less than 8 mm twin-wall polycarbonate are considered to be Season Extenders ...The RIGA is truly a greenhouse by the European definition of a greenhouse - designed to be used to grow fresh vegetables herbs and flowers in the middle of winter. While other so called greenhouses using less than 8 mm twin-wall polycarbonate are considered to be Season Extenders to be used when only a slight night frost might be expected during the spring or fall season.
At best they can only be used to house established plants during the winter season. The Riga Greenhouse offers more window and door ventilation than another units it is class. The polycarbonate glazing on the Riga Greenhouse is German made and believed to be of superior quality then the much more common Polygal or GE glazing.
Extremely heavy duty construction. First-class insulation: R or K-value 3.0. 8 MM UV coated twin wall polyvcarbonate over main body.
10 MM twin wall polycarbonate in front & back walls for extra strength.