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GCT manufactures the Freestanding greenhouse as a simple solution for many growers and clients. These Freestanding greenhouses have been built across all of North America. The versatility in size and options available with these greenhouse growing systems provide growers with a growing solution for many different crops, including bedding plants, hydroponics, aquaponics, organic, and more.


The Freestanding greenhouse is a smart choice for any grower. All of the parts involved with the freestanding greenhouse are pre-drilled, easy to assemble, and are built with long-lasting galvanized steel components.


The roof’s peak style helps shed snow, while forced-air heating keeps the greenhouse at an optimum temperature for all seasons. By ventilating with roof vents, roll-up side vents, or even conventional fans and motorized shutters, the grower's crop will always be maintained with exceptional quality.

GCT Farm System

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  • 21 ft and 24 ft freestanding

  • 27 ft, 30 ft, and 32 ft widespan

Standard Post & Arch Spacing:

  • 12 ft post spacing at various heights

  • 4 ft and 6 ft arch spacing


  • Available in 4ft or 5ft centers (32 ft in 5ft only)

  • 2” dia. galvanized steel anchor post, side post, arches and peaks

  • 21 ft houses have 3 runs of 1” steel purlins, 24 ft, 27 ft, 30 ft & 32 ft houses have 5 runs

  • All components are pre-drilled and swagged

  • Diagonal steel wind bracing

  • 30 ft widespan houses have crop transfer braces every 8 ft or 10 ft

  • 32 ft widespan houses have crop transfer braces every 5 ft

  • Gable ends for poly or polycarbonate

  • Includes all necessary mounting brackets, fasteners and anchor posts, and end arches for polylock


  • Conventional fans and shutters

  • Aluminum base with polylock along sides

  • Inflation Kits

  • Polyethylene films

  • M.G. wire polylock with fasteners

  • Polycarbonate panels (6mm or 8mm twin wall)

  • Single doors 4 ft x 8 ft

  • Double doors 8 ft x 8 ft

  • Roof vents

  • Roll-up sides

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