Application → specification
A propagation house and a vegetable production house can share a covering material while requiring different ventilation, clearances and operating access. Describe the crop workflow before comparing factory packages.
Record crop height, training supports and aisle layout. Ask the project designer to review how added crop or service loads relate to the structural scope. Identify roof vents, drainage, service access and the control interface required for the production plan.
Describe bench widths, misting zones and the planned sanitation route. A fine mesh or shade curtain can change airflow conditions; specify it with the vent arrangement instead of adding it after a cooling package has been priced.
Clarify whether the structure is temporary or permanent, what seasonal use means and who removes or replaces the covering. Film replacement access, storage conditions and waste handling can affect a budget-led purchasing decision.
Specify pallet or bundle handling, site access, bay identification and spare fasteners. Ask whether packing matches the erection sequence. A shipping package suitable for a warehouse may require different unloading equipment at a growing site.
| Decision | Glass / diffuse glass | Polycarbonate / film |
|---|---|---|
| Optical requirement | Request light transmission, diffusion where relevant and the supplier's test conditions. Do not compare a new-glass laboratory value with an aged covering value. | Request the same optical basis, thickness and any layer treatment. Ask how condensation and aging are addressed in the offered specification. |
| Frame and bay layout | Bind panel dimensions and support details to a drawing revision. A venlo greenhouse name alone does not state span / bay width or site load capacity. | Confirm sheet support spacing or film fixing details, replacement access and compatibility with the quoted frame. |
| Budget and maintenance | Separate packing, breakage provisions and replacement handling. Evaluate the purchase against the planned use and support arrangements. | Compare initial envelope cost with the proposed replacement procedure and maintenance burden; a simpler starting price does not establish lower lifetime cost. |
| Climate equipment | Identify vent area, shading or light deprivation, fans, evaporative cooling pad, electrical supply and control responsibility. Their performance remains dependent on site climate, crop and engineering calculations. | |
Illustrative procurement scenario: a nursery compares two packages for the same bay layout. The buyer records covering thickness, optical test basis, vent scope and replacement labor as separate rows, then asks both factories to mark exclusions. The outcome is a clearer comparison record; no yield or energy result is claimed.
Before approval, ask for sample dimensions and material identification, review the documented test basis, and compare the sample with the final schedule. Site loads, foundation design and permit suitability need qualified local review. Product language follows the Priva horticulture reference, which does not validate any offered supplier. Browse inquiry options when you are ready to define quantities.
State the project use, structure and covering, dimensions and bay layout, quantity, receiving location and seasonal delivery target.