Short answer: A greenhouse covering datasheet should identify product type, thickness or build-up, dimensions, optical and thermal properties, UV protection, surface treatments, mechanical properties, warranty conditions, installation direction, storage and compatibility. Buyers should compare the complete datasheet and project use, not only film thickness or panel layers.
Plastic film, rigid polycarbonate panels and glass use different performance measures and installation systems. Confirm whether the quotation includes one or two film layers, an inflation system, single- or multiwall polycarbonate, tempered or other glass, profiles, seals, fasteners and replacement accessories.
| Film property | Buyer question |
|---|---|
| Thickness and roll size | Does it match the roof or side dimensions, overlaps and installation method? |
| Light transmission and diffusion | How were values measured and what crop or climate objective do they support? |
| UV stabilization | What exposure, storage, installation and chemical conditions apply? |
| Anti-drip or anti-fog surface | Which side faces inward and how should it be handled? |
| Thermal or infrared property | Is heat-retention performance relevant to the target climate and crop? |
| Mechanical data | What test methods and installation tension are specified? |
Confirm panel thickness, wall structure, width, length, mass, UV-protected side, light transmission, thermal data, impact test reference and allowable installation details. Ask for required support spacing, expansion allowance, minimum bend radius where applicable, edge sealing, profiles and fasteners. Panel performance depends on correct orientation and installation.
Confirm glass type, thickness, dimensions, surface treatment where used, safety requirements, edge quality and glazing system. Structural and local safety review may affect glass selection. Include gaskets, clips, sealants, supports and replacement access in the comparison.
Light transmission, haze or diffusion and thermal properties can use different test methods and conditions. Ask for the method and product configuration. More transmission is not universally better if the crop and climate need diffusion or shading; the covering must be coordinated with screens, ventilation and cooling.
Read the written warranty, covered property, start date, claim process, required records, installation conditions, chemical restrictions and prorating where applicable. Do not turn a warranty period into a guaranteed service life. Exposure, installation, maintenance, crop chemicals and extreme events can affect performance.
Identify inside and outside surfaces before installation
Protect film and panels from sharp edges, dragging and contamination
Allow thermal expansion for rigid panels
Use compatible profiles, seals, tapes, fasteners and cleaners
Follow specified film tension and lock-channel details
Store material away from heat, sunlight or moisture as instructed
Record product labels and batches for warranty traceability
Compare covering area, wastage allowance, accessories, installation tools, inflation equipment, replacement pieces, packaging and freight. Confirm whether side curtains, insect net, doors, gable panels and internal screens use different materials. A low covering price can exclude essential profiles and installation parts.
No. Thickness is one factor; resin, additives, optical properties, installation, climate and warranty conditions also matter.
Follow the manufacturer's marked UV-protected side and installation instructions.
No. It can influence droplet behavior, while humidity, surface temperature, slope, ventilation and installation still matter.
No. Review the written coverage, conditions, exclusions and actual site exposure separately.
Use the covering comparison guide, cover material category and document approval checklist.
Send the climate, crop, structure and proposed covering datasheet through the contact page for a comparison checklist.