Medicinal Cannabis and Marijuana Hemp greenhouses

Redpath manufacture, distribute and install our range of commercial crop greenhouses from its factories based in Australia and New Zealand.
Medicinal cannabis or marijuana where legal and authorized to grow can achieve substantially improved production levels when grown under controlled environmental conditions.
Redpath use and recommend Duratough® greenhouse film for this growing of medicinal marijuana as it has a high P.A.R (Photosynthetic Active radiation) transmittance level.
Greenhouse production of this crop is increasing in overseas markets, as the quantity of crops per year can be substantially improved, and the low energy needs that a good quality greenhouse provides due to its natural ability to harvest sunlight and energy offering savings on supplementary lighting and heating costs.

Natural ventilation via full length rack and pinion ridge ventilation is usually selected.  Redpath supply these with automatic electric motor/drives. Automatic ridge mounted roof ventilation systems are proven world-wide to provide accurate control of temperature and humid surrounding the adult plants growing environment and these systems are highly suited to New Zealand’s conditions. The roof ventilation system can be quarantine screened to exclude pests using the ‘radial screen’ design developed by Redpath.
For sheltered sites or where bio-security is paramount an option is to use a Redpath  “forced air vented” greenhouse design. These utilise air inlet and extraction fan systems (sometimes with cooling evaporative pads on the inlet side).  Redpath also offers the forced air ventilation option where temperatures are higher and humidity is relatively low or where quarantine levels are paramount.

Other factors to consider for this crop are the greenhouse must have the ability fit overhead black out screens or thermal screen systems and in some cases overhead supplementary lighting support when required. Redpath can include overhead black out, thermal or shade screens and offer supplementary lighting to suit your needs with the greenhouse supply.
Pest exclusion systems minimise spray use and secure entranceways and sealed ‘annexes’ etc. are straight forward options with Redpath designs.

Redpath manufacture and supply direct in small or large areas. Sizes range from just a few hundred square metres for propagation or trial purposes, – through to our multiple hectare designs for commercial production.
We manufacture the building, Complete with the design engineering, Apply for permits and erect the structures on your site nationwide for a seamless order and supply service.

Redpath work alongside leading hydroponic grower consultants who help manage the plant production systems required.

Basic Specifications of designs:

  • Span / Bay Widths: 6m, 8m, 9.6m & 10.65m clear spans.
  • Post spacing lengthways: 3 metres between posts (spacer beam to allow of 6m centres also an option)
  • Height to gutter options: 3m, 3.5m, 4m, or 4.5 metres
  • Apex height: Up to 7.5 metres
  • Side ventilation: – Standard roll up wall, manual or optional automatic. Rack & pinion side vents also available or forced air fan with cooling inlet pad system.
  • Security Sides: Hard clad side walls are an option with this design
  • Blackout screen compatible: Yes, screens quoted as an optional extra
  • Roof ventilation: Rack and Pinion design, full length, with auto or manual control, Single facing or Double facing “butterfly” options
  • Roof cladding: Single-skin or Twinskin Duratough® 210 4 Year film (service life 6-8 years)
  • Wall cladding: Single-skin or Twinskin Duratough® 210 micron 4 Year film (service life 6-8 years)  Shadecloth cladding or Hard security cladding also an option.
  • Screens & Lighting: Blackout, Thermal or Shade screens and lighting can be quoted as an option
  • Greenhouse film anti-fog package: Included for reduced overhead dripping onto crops
  • Frame Guard Tape: Polyguard fitted to all roof members that touch the plastic included
  • Gutter design: Wide “walkthrough” Vee gutter,  steel ,  gives easy & safe access to roofline. Rainheads included
  • Doors: Sliding door with aluminium framed, aluminium base sheet with clear acrylic top section panels, doors may be in end or sidewall
  • Footings: Typically 1.3 metre deep x 0.450 diameter (soil type dependent)
  • Wind load:  120kph, greater if required
  • Crop loading: 15kg m2, greater if required, crop kit system included on request. (overhead wire location by client)
  • Snow load:  Yes, snow load compliant up to 50kg m2
  • Installation: Redpath can supply in Kit form or have your nearest subcontract builder install your building for you.
  • Main assembly: All bolted design, Rubber sleeves (3mm thick) fitted to all poles at ground contact for superior anti-corrosion
  • Warranty: Yes, Redpath 5 Year gold series manufacturer’s warranty, with extra warranty on coverings

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