GrowSpan Gothic High Tunnels, with 6'H sidewalls, sufficiently modify the environment to enhance crop growth, quality and yield. Ideal for a wide variety of crops, these high tunnels offer temperature control and protection from wind, rain, disease and predators. New taller high tunnels offer more growing space and increased ventilation!
• Frames are constructed with our 14-gauge USA-made, triple-galvanized structural steel tubing. 20'W tunnels use 1.66" OD pipe.
• Available with either our superior PolyMax® 5.2 oz., 12 mil thick Clear Woven Greenhouse Covering or our Sun Master® 6 mil 4 year Clear Greenhouse Film.
• Our PolyMax® 5.2 oz.,12 mil Clear Woven Greenhouse Covering comes with a 4 year warranty. With added UV inhibitors, this cover offers 85% light transmission, has excellent cold-crack resistance and will not tear.
• Our Sun Master® 6 mil 4 year clear film is made from strong copolymer resin with an anti-static additive that repels dust and dirt and keeps the light shining through. This film, with tri-layer construction and UV additives, offers 92% light transmission and comes with a 4 year warranty.
• Choose Roll-Up or Drop-Down Sides, manufactured from our 5.2 oz. fabric, to control the air entering the high tunnel and provide four-sided ventilation.
Includes our exclusive"Twist-of-the-Wrist" Assembly, complete with all necessary hardware for installation.
• Optional Ridge Vent Kit, available only on units with 5.2 oz. clear greenhouse cover, allows control over ventilation and temperatures within the high tunnel during the hot summer months.
• Roll-up doors, which utilize our Hand-Crank Assembly, and end panels are manufactured from 10 oz., 22 mil translucent fabric.
• 20'W units have 16'W x 10'H doors.
• Purchase 4 x 4s locally to strengthen and finish off the ends.
• 4' rafter spacing.
• For additional strength and durability, particularly in heavy snow areas, add our High Tunnel Rafter Kits or our Support Kits.
• 6' sidewalls provide additional, valuable growing space.
• Heavy-duty ground posts are included.
• Baseboards are required to attach Drop-Down Sides. Our Recycled Plastic Lumber, sold separately, comes with a 50 year warranty and is ideal.