As autumn approaches, lower temperatures, increased humidity and shorter daylight hours can all affect professional spraying work. Taking time to prepare now can help reduce delays, protect equipment and maintain the high-quality finishes customers expect.
Air temperature is only part of the picture. The temperature of the surface being sprayed, humidity levels and the possibility of condensation can all influence how a coating applies and cures.
A surface may remain cold even after the surrounding air has warmed up, particularly first thing in the morning. Before beginning work, sprayers should check the conditions and always follow the coating manufacturer’s latest Technical Data Sheet.
If conditions fall outside the recommended limits, postponing the application may be the most professional decision. Spraying regardless can lead to poor adhesion, extended drying times or an uneven finish—and potentially a costly return visit.
Products generally dry and cure more slowly as temperatures fall. A coating that was ready for its next coat quickly during summer may need considerably longer in cooler conditions.
Build additional drying time into the working day and avoid assuming a surface is ready based purely on touch. Closing doors, refitting furniture or exposing a newly coated surface to moisture too soon could damage the finish.
When planning kitchen or workshop projects, controlled indoor conditions can make scheduling easier. However, any heating used must be suitable for the environment and the products being applied.
Paint and coating products should be stored in accordance with the manufacturer’s instructions and protected from frost and extreme temperature changes.
Leaving materials in a cold van overnight can affect their temperature and application characteristics. Wherever possible, allow products to reach the appropriate working temperature naturally before mixing or spraying them. Avoid trying to compensate by adding extra thinner unless the manufacturer specifically permits it.
Remember to check the storage requirements for cleaners, hardeners and other associated products too—not only the main coating.
Damp weather can introduce condensation to uPVC, doors, units and other surfaces. Even when moisture is difficult to see, it can interfere with preparation, adhesion and the final appearance.
Surfaces must be thoroughly clean and dry before coating. Take particular care around seals, joints, edges and sheltered areas where moisture may remain.
For exterior work, consider whether the surface is likely to stay dry throughout application and the initial curing period—not simply while the coating is being sprayed.
Colder weather can make it tempting to close every door and window, but ventilation and suitable exposure controls remain essential. HSE guidance warns that spraying solvent-containing products can create high airborne exposure, particularly in enclosed or poorly ventilated areas.
The correct controls will depend on the products and working environment, but may include segregation, mechanical ventilation or local exhaust ventilation and appropriate respiratory protective equipment. Never compromise safe working practices simply to keep a workspace warm.
The change of season is also a useful time to inspect and maintain spray equipment. Check hoses, filters, seals, guns and fluid sections for wear, clean equipment thoroughly and follow the manufacturer’s maintenance instructions.
Compressors and airlines should also be checked for moisture, as condensation can become more noticeable as temperatures change.
Managing expectations is an important part of working professionally. Explain that suitable conditions are essential for achieving a durable finish and that colder weather may affect scheduling or drying times.
Most customers will appreciate knowing that a delay is about protecting the quality of their finished project—not simply avoiding a difficult working day.
Preparation, patience and careful monitoring can help professional sprayers continue producing excellent results throughout the colder months.
Members are encouraged to consult product manufacturers’ latest technical information and review their own risk assessments and working procedures before undertaking any spray application.
