Venlo Greenhouse
Venlo Greenhouse
The benchmark of modern greenhouse engineering — originating from the Dutch greenhouse hub of Venlo, this small-roof glasshouse sets the standard for light transmission, structural precision, and longevity. Each main span contains multiple 3.2m small gable roofs glazed with 4-8mm tempered glass or 4-16mm polycarbonate hollow sheet, supported by slender aluminum alloy profiles that minimize shading. The result is a light transmission rate of up to 90%+ (glass) or 75–85% (PC) — combined with factory-prefabricated aluminum/steel construction, rack-and-pinion ridge ventilation on every small roof, and a service life of 20+ years. The preferred choice for high-end floriculture, premium vegetable production, research, and commercial display.
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Key Highlights
· Venlo 3.2m small-roof design with glass or polycarbonate — light transmission up to 90%+ (glass) or 75–85% (polycarbonate)
· Slender aluminum glazing bars + galvanized steel frame — factory-prefabricated precision, 20+ year service life
· Rack-and-pinion ridge vent on every small roof — ventilation up to 20–30% of floor, precise zone control
· Global standard for high-end floriculture, premium vegetables, research, and display
· Slender aluminum glazing bars + galvanized steel frame — factory-prefabricated precision, 20+ year service life
· Rack-and-pinion ridge vent on every small roof — ventilation up to 20–30% of floor, precise zone control
· Global standard for high-end floriculture, premium vegetables, research, and display
Product Overview — The Dutch Standard for Light and Precision
The PONSUNO Venlo Greenhouse is the most widely adopted large-scale greenhouse type worldwide. Its design maximizes light through three engineering choices: 3.2m small roof spans, slender aluminum glazing bars (instead of heavy steel purlins), and high-transmission covering (glass or polycarbonate). It is the global standard against which other large-scale glasshouses are measured.
- Structure & Materials. The load-bearing frame uses hot-dip galvanized steel (275g/m² zinc coating) for columns, trusses, and bracing. The roof glazing system — bars, caps, gutters, vent frames — uses extruded aluminum alloy, lightweight and corrosion-free. All components are factory-prefabricated and bolted/clipped on site; no field welding.
- Roof Design. Each main span (6.4m / 8m / 9.6m / 12.8m) contains two or more 3.2m small gable roofs (~0.8m high, 22–25° pitch). The short span allows slender aluminum bars, minimizing shading. Each small roof has its own ridge vent for zone-by-zone control. Multiple gutters provide excellent drainage.
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Light Transmission Core Advantage. Three factors deliver industry-leading light:
· 4mm tempered glass: 90%+ transmission, full PAR spectrum — for high-light crops and maximum yield· Polycarbonate (4–16mm): 75–85% transmission, better insulation and impact resistance — for cold climates and hail-prone regions· Slender aluminum bars + no intermediate purlins: minimal structural shadingGlass Venlo greenhouses deliver 5–15% more light than polycarbonate or film structures; polycarbonate Venlo greenhouses reduce heating demand by 20–40% vs. single-layer glass.
- Ventilation. Ridge vent on both sides of every small roof, rack-and-pinion driven. Total ventilation area up to 20–30% of floor area — among the highest of any greenhouse type. Operable independently per bay or zone. Side ventilation optional.
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Covering Options. The glazing system accepts both glass and polycarbonate:
· Glass (high-light): 90%+ transmission, premium appearance, 20+ year life· Polycarbonate (insulation): 75–85% transmission, better insulation/impact resistance, 10–15 year life· Double glazing: maximum insulation for extreme cold· Side walls: glass / PC / color steel / film — independently selectable
- Structural Performance. Wind resistance up to 130–150 km/h; snow load 0.30–0.50 kN/m². Reinforced options available for high-wind/high-snow regions.
- Trade-Offs. Higher capital cost than film structures. Single-layer glass has lower insulation than PC or double-film — mitigated by choosing PC covering, double glazing, or thermal screens. Integrated Systems. Full range available: ridge + side ventilation, internal/external shading (30–85%), thermal screens, heating, drip/spray fertigation, multi-zone environmental control, supplemental lighting, CO₂ enrichment, rolling benches/hydroponics.
Who It's For. High-end floriculture (roses, orchids), premium vegetable production (tomatoes, peppers), research institutions, retail/display greenhouses, cold-climate growers (with PC covering), and long-term capital investment projects.
| Parameter | Specification |
| Structure Type | Venlo greenhouse (small-roof) |
| Roof Profile | Multiple 3.2m small gable roofs per main span |
| Main Span Width | 6.4m / 8m / 9.6m / 12.8m |
| Small Roof Span | 3.2m |
| Roof Pitch | ~22° – 25° |
| Bay Spacing | 4m (standard) |
| Number of Bays | 2 – 20+ |
| Gutter Height | 3.5m – 6.0m |
| Frame | Hot-dip galvanized steel (columns/trusses) + aluminum alloy (glazing system) |
| Column Size | 60×60 – 100×100mm square tube |
| Gutter | Aluminum alloy or galvanized steel, sloped drainage |
| Roof Covering | 4mm tempered glass / PC hollow sheet (4–10mm) / double glazing |
| Side-Wall Covering | Glass / PC / color steel / film |
| Light Transmission | 90%+ (glass) / 75–85% (PC) |
| Ventilation | Ridge vent per small roof (rack-and-pinion) + optional side vents |
| Ventilation Ratio | Up to 20–30% of floor area |
| Shading | Optional internal/external (30–85%) |
| Thermal Screen | Optional energy curtain |
| Heating | Optional hot-water boiler / unit heater / radiant floor |
| Irrigation & Fertigation | Optional drip/spray with automated dosing |
| Environmental Control | Optional multi-zone + remote app |
| Supplemental Lighting | Optional LED / HPS |
| Snow Load | 0.30 – 0.50 kN/m² |
| Wind Load | Up to 130 – 200 km/h |
| Door | Aluminum glass door / personnel door |
| Frame Service Life | 15 – 20 years |
| Glass Service Life | 20+ years |
| PC Service Life | 10 – 15 years |