This commercial tunnel greenhouse pairs galvanized steel hoops with aluminium connectors, so the frame stays rigid without the rot or cracking of a timber or PVC structure. Clear spans reach 10 m, which leaves room for tractor access and row cropping rather than narrow beds and hand work. Roll up sidewalls and ridge vents give passive cooling through the day, and all parts arrive pre cut and numbered for bolt together assembly. Width runs 6 m to 10 m and length 20 m to 100 m or to order, flat packed for container shipping. It suits commercial vegetable growing.
On a working vegetable block, the width of a tunnel decides how the ground inside it can be farmed. A narrow house means beds worked by hand and a barrow for every load. A wide one lets a tractor in, and that changes the whole economics of the crop. This commercial tunnel greenhouse is built for the wider case: clear spans up to 10 m on a galvanized steel frame, with no post line down the middle of the bay.
A clear span up to 10 m keeps the whole floor usable from gable to gable. Beds, paths and machinery run straight through, so soil preparation, planting and harvest can be done on the same pass instead of by hand between posts. Width is available at 6 m, 7 m, 8 m, 9 m and 10 m, and length from 20 m to 100 m, which means a single span can be matched to the block it serves rather than the block being cut to suit a standard house.
The hoops are galvanized steel and the connectors are aluminium, a combination that keeps the frame rigid while avoiding the weight and rot of timber or the cracking of PVC. Galvanizing is what carries the structure through years of humid air and condensation, which is why the frame is rated for a 15 to 20 year service life rather than a decade. The cover is a film drawn over the frame in one piece, so a torn cover is replaced over the existing structure without taking the house down. Every part is pre cut and numbered before shipment.
| Structure material | Galvanized steel hoops with aluminium connectors |
| Covering material | Plastic film over the frame |
| Roof shape | Curved arch, single clear span |
| Clear span | Up to 10m, no internal post line |
| Width | 6m / 7m / 8m / 9m / 10m, custom |
| Length | 20m to 100m, custom |
| Ventilation | Roll up sidewalls and ridge vents for passive cooling |
| Assembly | Pre cut and numbered parts, bolt together, no welding |
| Packing | Flat packed for container shipping |
| Service life | 15 to 20 years for the frame under normal growing conditions |
Cooling on this house is passive by design. Roll up sidewalls along both flanks let air in low down, ridge vents let warm air leave at the highest point, and the two together work as a stack rather than needing fans to move air. That keeps running costs down and keeps the crop inside its band through the middle of the day. Research from Wageningen University & Research covers greenhouse climate and crop response in protected cultivation.
Because every part is pre cut and numbered, erection follows the drawing rather than requiring fabrication on site. The order runs foundation, hoops, purlins and braces, then the film, then sidewalls and ridge vents. Flat packing keeps freight volume down for container shipment. Our engineers can travel to site to guide installation when required.
Routine work is limited. Check film tension at the start of each season and look for any split at the fixings, clear the vents so the stack keeps working, and inspect pipe joints and braces for movement after storm season. Film is the consumable part of the house and is replaced on a three to five year cycle.
The house suits commercial vegetable growing, seedling raising and cut flower production, and the wide clear span is what makes it practical for mechanised row crops. Agrifood sourcing reporting on Wikifarmer follows how vegetable supply is planned at commercial scale. Compare the tunnel greenhouse range, or look at the galvanized polytunnel greenhouse and the single span tunnel greenhouse with shade net for other options on the same frame system.
A clear span up to 10 m means there is no post line in the middle of the bay, so a tractor and implements can work the whole floor. That turns a hand tended tunnel into a mechanised one.
Roll up sidewalls bring air in low down and ridge vents let warm air out at the top, so the two work as a stack. Cooling is passive, which keeps running costs down.
The galvanized steel frame is rated for 15 to 20 years under normal growing conditions. The film cover is replaced on a three to five year cycle.
We provide a 10 year structural warranty and a 5 year anti-corrosion warranty on the galvanized frame. Details are set out in the contract for each project.
Send your block dimensions, the crops you plan to grow, the machinery you intend to use and your local wind and snow loads. We reply with a layout drawing and a full quotation.
