When their bids are successful, contractors meet customers to finalize their requirements and plan the order and timing of work. Contractors estimate the time required for surface preparation, painting several coats and drying time between coats. For interior painting jobs, they might have to allow time for clearing rooms. Exterior painting schedules might be dependent on the weather in different parts of the country. Exterior painting is not practical in very wet or very cold conditions.
To win work, contractors generally have to bid against other suppliers. To make an accurate bid, they estimate the time and materials required to complete the job. They measure the area to be painted and discuss the type of finish the customer requires. They assess the quality of the surfaces to work out how much remedial work they must carry out before painting. They might have to remove old paint or wall coverings, or repair cracks and other damage. They also calculate the cost of any essential equipment, such as scaffolding for exterior walls.