Control solar gain and heat loss as part of the operating plan.

Name the climate problem before choosing a percentage

Shade percentage describes light reduction, but it does not describe the whole growing environment. The useful first question is whether you need to lower solar gain, limit peak leaf stress, manage glare, soften sidewall exposure or run a seasonal cover strategy. The answer changes with crop, season, local sun angle, existing roof material, ventilation capacity and whether the cloth is installed inside or outside the structure.

Separate daytime light management from heat retention

Shade cloth primarily changes incoming solar radiation. A single- or double-film system changes the greenhouse envelope and its operating work. A double-layer film arrangement may require compatible inflation equipment, attention to air pressure and regular inspection of tension and sealing. Do not expect a shade material to solve a ventilation problem, or an added film layer to replace routine climate observation.

Use a short observation plan

• Record outdoor and in-house temperature at the same times each day.
• Note ventilation position, humidity response and visible crop condition.
• Test a proposed shade period or location before committing to a full installation.
• Review the exact cloth specification and film system instructions with the supplier.