RIGA III top of the line German Hobby Greenhouse (9 ft. 8 in. W x 10 ft. 6 in. L x 7 ft. 6 in. H; 102 sq. ft.). Purchasing a premium quality greenhouse is an investment. With the Riga III you get premium materials along with premium customer service. Exaco customer service can be reached 7 days a week and have been trained for the Riga series of greenhouses. There is no question they can't answer. If you have questions give them a call 877-760-8500. The Riga III frame is made from 12-Gauge aircraft aluminum and designed to last a lifetime. The framing is assembled with all stainless steel hardware and carries a 15 year warranty. The RIGA III is covered with UV coated Twin-wall Polycarbonate Glazing. The polycarbonate is 10 mm thick on the front and rear and 8 mm on the sides. This along with the precise construction gives the RIGA III best insulation in its category. Adding a small heater in the winter will keep the Riga III very warm. The unique design of Riga III not only looks good on your property is has many benefits too. The sloped roof prevents snow buildup, it just slides right off. The sloped design allows strong winds to blow right over and hail bounces right off. The Riga III is outfitted with a 30 in. wide Dutch style door in the front an oversized roof window and an oversized window in the rear wall. No matter what level of gardener you are the RIGA III will make you feel like a professional.