Each multispan structure serves different growing needs. Here's how to choose:

Multispan Polytunnel (From $9,340)

• Best for: Year-round crop production, temperature-sensitive plants, seedling nurseries, early season growing
• Cover: Australia's thickest 250-micron UV-stabilised greenhouse film for maximum heat retention and light diffusion
• Climate Control: Full environmental control with optimised ventilation systems
• Wind Rating: 130 km/h - suitable for most Australian locations
• Use Cases: Tomatoes, capsicums, cucumbers, lettuce, herbs, cut flowers, propagation

Multispan Shade House (From $7,140)

• Best for: Heat-sensitive crops, nursery stock, ornamentals requiring partial shade
• Cover: 180gsm UV-stabilised knitted shade cloth (50% filtration standard, custom options 50-90%)
• Benefits: Lightweight yet strong, reduces structural load, excellent airflow, hemmed edges for durability
• Wind Rating: 130 km/h with superior wind permeability
• Use Cases: Native plants, ferns, orchids, shade-loving ornamentals, reducing transplant shock

Multispan Net House (From $8,417)

• Best for: Pest exclusion, hail protection, bird control while maintaining natural ventilation
• Cover: Choice of hail netting or bird netting based on your needs
• Frame: 32mm hot-dip galvanised steel designed for net tension and wind loads
• Ideal for: Tree propagation, organic growing (reducing pesticide need), fruit trees, berry production
• Use Cases: Blueberries, stone fruit trees, citrus propagation, vineyard bird protection

Still Unsure? Contact our team for a free consultation. We'll assess your crops, climate, and budget to recommend the perfect multispan solution.

Our multispan structures feature industrial-grade construction engineered for Australian conditions.

Frame Specifications:

• Primary Frame: 32mm - 42mm hot-dip galvanised structural steel tubing (varies by model)
• Galvanisation: Full hot-dip process providing 10+ year corrosion resistance guarantee
• Welded Connections: All critical joints are professionally welded for maximum strength and rigidity
• Join-Clamp Connectors: Allow seamless expansion and multi-span joining
• Arch Spacing: 1.5m - 2m spacing (model dependent) for optimal load distribution
• Foundation System: 40mm-42mm galvanised steel footings designed for concrete anchoring or ground sockets

Reinforcement Features:

• Dual 'Top Hat' steel channel system (25x25x40x25x25mm) for improved rigidity
• 8 heavy-duty corner support brackets (2 per corner) standard on most models
• Front wall bracings for wind resistance
• Reinforced door frames to prevent sagging
• Horizontal support arches for added stability (premium models)

Engineering Standards: All structures are designed to meet Australian building standards and can be engineer-certified for council approval upon request.

Standard Multispan Widths:

• 8m Width: Entry-level multispan, ideal for hobby farms and small commercial operations
• 9.8m Width: Mid-size option balancing coverage and cost
• 11.6m Width: Large commercial span for maximum efficiency

Standard Lengths: 8m, 10m, 12m, 14m, 16m, 18m, 20m

Height Specifications:

• Wall Height: 1.5m - 2.2m (standard to premium models)
• Apex Height: 3.2m - 4m (provides excellent clearance for tall crops and machinery)

Customisation Options:

• Extra Door Kits: Add additional 2m x 2m sliding door panels for improved access (add $400-600 per kit)
• Roll-Up Side Ventilation: Manual or motorised options for climate control
• Custom Lengths: Extend beyond standard lengths in 2m increments
• Hybrid Configurations: Mix polytunnel, shade house, and net house spans in one connected system
• Shade Cloth Options: 50%, 70%, or 90% shade density (for shade houses)
• Netting Types: Hail net (various mesh sizes) or bird netting (for net houses)

Need a Custom Size? We design bespoke multispan systems for unique sites. Contact us with your dimensions, and we'll provide a custom quote within 48 hours.

We offer three specialised cover types, each engineered for specific growing conditions:

1. Greenhouse Film (Multispan Polytunnel)

• Thickness: 250 microns - Australia's thickest polytunnel cover
• Material: Multi-layer UV-stabilised polyethylene with anti-fog and light diffusion properties
• Light Transmission: 90%+ with optimal diffusion to reduce plant stress
• UV Protection: 5-year UV stabilisation guarantee (typically lasts 6-8 years)
• Benefits: Excellent heat retention, protection from frost, rain, and wind, creates controlled microclimate
• Temperature Control: Can raise internal temperatures by 8-15°C depending on ventilation and season

2. Shade Cloth (Multispan Shade House)

• Weight: 180gsm knitted polyethylene
• Filtration Options: 50% (standard), 70%, or 90% shade density
• Construction: Knitted (not woven) for superior strength and wind permeability
• UV Stabilisation: 10-year guarantee on fabric integrity
• Edge Treatment: Hemmed edges prevent fraying and extend lifespan
• Weight Advantage: 40% lighter than equivalent woven shade cloth, reducing structural load
• Temperature Reduction: Can lower temperatures by 5-10°C while maintaining airflow

3. Protective Netting (Multispan Net House)

• Hail Netting: High-density polyethylene, various mesh sizes (typically 8mm-12mm) for hail stone protection
• Bird Netting: 12mm-20mm mesh depending on target species
• UV Stabilisation: 5-8 year expected lifespan
• Ventilation: Maximum airflow while providing physical protection
• Light Transmission: 85-95% (minimal shading effect)

Protection Felt Tape: Included with all systems to prevent friction between cover and frame, significantly extending cover life.

All multispan structures are engineered to withstand Australia's diverse and often harsh weather conditions.

Wind Ratings:

• Multispan Polytunnel: 130 km/h wind resistance when properly installed and maintained
• Multispan Shade House: 130 km/h with superior wind permeability reducing structural load during gusts
• Multispan Net House: Designed for high wind loads with tensioned netting that flexes during wind events

Engineering Features for Wind Resistance:

• Closer Arch Spacing: 1.5m-2m spacing prevents excessive flexing in high winds
• Reinforced Corner Bracing: 8 heavy-duty brackets (2 per corner) anchor the structure
• Front Wall Bracings: Prevent end-wall collapse during head-on wind events
• Ground Anchor System: Multiple options including concrete footings, ground screws, or auger anchors
• Profile Design: Gothic arch profile designed for optimal wind flow and snow load distribution

Durability in Australian Conditions:

• UV Resistance: All materials selected for extreme Australian UV exposure
• Temperature Extremes: Tested from -5°C to 50°C ambient temperatures
• Corrosion Protection: Hot-dip galvanisation provides 10+ years protection even in coastal environments
• Hail Resistance: Frame designed to withstand hail impact; poly film and netting options provide crop protection

Installation Requirements: Proper installation is critical for achieving rated wind resistance. We recommend professional installation or following our detailed installation guide. Wind ratings assume proper foundation anchoring and regular maintenance.

Site Considerations: Exposed sites, coastal locations, and areas with regular high winds may require additional anchoring or engineering certification. Contact us for site-specific advice.

Proper ventilation is critical for healthy plant growth. Our multispan structures are designed with commercial-grade ventilation in mind.

Standard Ventilation Features:

• Sliding Door Panels: Commercial-grade 2m x 2m doors at each end provide natural cross-ventilation
• End Wall Design: Optimised for maximum airflow when doors are open
• Optional Extra Doors: Add doors on side spans for increased ventilation and machinery access

Optional Ventilation Upgrades:

• Roll-Up Sides: Manual or motorised systems allow you to open entire side walls for maximum airflow during hot weather
• Roof Vents: Ridge vents or roof windows can be added for passive ventilation (heat rises and escapes)
• Shade Cloth Curtains: Install retractable shade inside polytunnels for temperature control without reducing ventilation
• Exhaust Fans: Powered ventilation systems for large multispan installations

Natural vs Mechanical Ventilation:

• Natural Ventilation: Ideal for most applications, uses doors and passive vents, no operating costs
• Mechanical Ventilation: Recommended for large multispan polytunnels (>200m²) or operations requiring precise climate control

Climate Control Integration:

Our multispan structures are designed to accommodate professional climate control systems:

• Heating Systems: Gas heaters, electric heaters, or hot water pipe systems for winter production
• Cooling Systems: Evaporative cooling pads and fans for temperature reduction
• Humidity Control: Fog systems or dehumidifiers depending on your crop requirements
• Automated Control: Compatible with electronic climate control systems and sensors

Multispan Advantage: A single unified climate control system can manage the entire multispan structure, reducing equipment costs and simplifying operation compared to multiple separate tunnels.

Multispan structures are trusted by commercial growers across Australia. Here's what you can grow:

Multispan Polytunnel Applications:

• Vegetable Production: Tomatoes, capsicums, cucumbers, lettuce, leafy greens, beans, peas
• Seedling Nurseries: Propagation of vegetable seedlings, ornamentals, native plants
• Herb Growing: Basil, parsley, coriander, mint - ideal for restaurant supply
• Cut Flowers: Roses, gerberas, chrysanthemums, carnations, and seasonal flowers
• Early Season Production: Get crops to market 4-6 weeks earlier than outdoor production
• Year-Round Growing: With heating, achieve 12-month production in most Australian climates

Multispan Shade House Applications:

• Nursery Stock: Native plants, ornamental shrubs, perennials requiring shade establishment
• Shade-Loving Plants: Ferns, orchids, bromeliads, tropical foliage
• Hardening Off: Transition seedlings from controlled environments to outdoor conditions
• Heat Stress Reduction: Grow heat-sensitive crops during Australian summers
• Reducing Transplant Shock: Ideal for tree propagation and container growing
• Shade for Livestock: Provide comfortable shaded areas for animals

Multispan Net House Applications:

• Organic Production: Exclude pests without chemical pesticides
• Tree Propagation: Protect young fruit trees, native trees, ornamental trees
• Berry Production: Blueberries, raspberries, blackberries - protection from birds
• Fruit Trees: Young citrus, stone fruit, avocados during establishment phase
• Vineyard Protection: Bird netting over grape vines before harvest
• Hail Protection: In hail-prone regions, protect high-value crops

Commercial Scale Benefits:

• Increased Yield: Protected growing typically increases yields by 30-50%
• Quality Control: Reduce weather damage, produce cleaner crops with less waste
• Market Access: Meet supermarket quality standards more consistently
• Extended Seasons: Produce crops outside their normal season for premium pricing
• Labor Efficiency: Work in comfortable conditions year-round, improve productivity

Installation Options:

We offer flexible installation solutions to suit your budget and timeline:

• Professional Installation: Full turnkey installation by our experienced team across Australia
• DIY Installation: Detailed installation guides, video tutorials, and phone support included with every kit
• Partial Installation: We handle foundation work and frame assembly; you install the cover
• Installation Training: We can train your team on-site for future expansions or maintenance

Installation Timeline:

• Site Preparation: 1-2 days (leveling, marking foundation points)
• Foundation Work: 1-3 days depending on soil type and method (concrete, ground screws, or augers)
• Frame Assembly: 2-5 days depending on size (small 8x8m to large 11.6x20m)
• Cover Installation: 1-2 days (requires calm weather for proper tensioning)
• Total Time: 5-12 days for a complete professional installation

DIY Installation Considerations:

• Team Size: Minimum 3-4 people recommended; 5-6 for larger structures
• Skills Required: Basic construction skills, ability to use hand and power tools
• Special Equipment: Post hole digger or auger, ladder, concrete mixer (if using concrete footings)
• Installation Support: We provide comprehensive guides, videos, and phone/email support throughout your build
• Estimated Time: 2-3 weeks for a team working part-time

Site Requirements:

• Level Ground: Site should be reasonably level (minor grading acceptable)
• Drainage: Good drainage essential - avoid low-lying areas prone to flooding
• Sun Exposure: North-facing orientation optimal for polytunnels (maximum winter sun)
• Wind Protection: Consider natural windbreaks or plant hedgerows for exposed sites
• Access: Clear access for delivery truck (multispan kits are oversized freight)
• Utilities: Plan for water access, electricity if adding automation

Professional Services Available Australia-Wide:

• Site Assessment: Pre-purchase site inspection and recommendations
• Custom Design: Tailored multispan solutions for unique requirements
• Engineering Certification: Structural engineering reports for council approval
• Repair & Maintenance: Cover replacement, frame repairs, structural upgrades
• Upgrades & Modifications: Add spans, doors, ventilation systems to existing structures

Warranty & Support:

• Structural Frame: 10-year corrosion resistance guarantee
• Poly Film Cover: 5-year UV stabilization warranty
• Shade Cloth: 10-year fabric integrity warranty
• Ongoing Support: Lifetime phone and email support for all customers

📹 Watch Our Installation Guide: Full step-by-step video series available on our website

Purchase Costs (Starting From):

• Multispan Polytunnel: From $9,340 (8m x 8m base configuration)
• Multispan Shade House: From $7,140 (8m x 8m base configuration)
• Multispan Net House: From $8,417 (8m x 8m base configuration)

Cost Factors:

• Size: Larger structures have better cost per square metre
• Width: Wider spans (11.6m) more cost-effective than narrower (8m) for same total area
• Extra Doors: Add $400-600 per additional door kit
• Customisation: Roll-up sides, ventilation upgrades, custom covers affect pricing
• Installation: DIY saves $2,000-8,000 depending on size
• Freight: Varies by location - remote areas incur higher costs

Running Costs:

• Minimal Maintenance: Galvanised frame requires virtually no maintenance
• Cover Replacement: Every 5-10 years depending on type (poly film 5-8 years, shade cloth 10+ years)
• Utilities: Polytunnels with climate control: $500-2,000/year in heating/cooling (varies by climate and crop)
• Repairs: Occasional zip tie replacement, door track maintenance (minimal cost)

Return on Investment (ROI):

Case Study: 8m x 20m Multispan Polytunnel ($15,000 investment)

• Growing Area: 160m² of protected space
• Crop: Cherry tomatoes, 2 crops per year
• Yield Increase: 40% more yield vs outdoor + earlier to market
• Additional Revenue: $18,000-25,000 per year (based on wholesale prices)
• Payback Period: 8-14 months

Case Study: 9.8m x 16m Multispan Shade House ($12,500 investment)

• Growing Area: 156m² of shaded space
• Crop: Native plant nursery stock
• Capacity: 2,500-3,000 plants in containers
• Survival Rate Improvement: 30% fewer losses due to heat stress
• Additional Revenue: $12,000-18,000 per growing cycle
• Payback Period: 10-18 months

Case Study: 11.6m x 14m Multispan Net House ($14,800 investment)

• Growing Area: 162m² of protected space
• Crop: Blueberry plants for propagation/sale
• Benefit: 95% reduction in bird damage, improved plant quality
• Additional Revenue: $15,000-20,000 per year (reduced loss + quality premiums)
• Payback Period: 9-15 months

Financial Benefits:

• Increased Productivity: Grow more in less space with higher quality
• Extended Seasons: 4-8 additional weeks of production = premium prices
• Reduced Losses: Weather protection minimises crop loss and waste
• Labour Efficiency: Work comfortably in all weather, improve productivity
• Business Asset: Increases property value and business equity
• Tax Benefits: May qualify for instant asset write-off or depreciation (consult your accountant)

Financing Options: Many commercial growers use equipment financing or farm business loans. We can provide detailed quotes and specifications for your lender.