You can save a bundle by doing the labor yourself. The biggest DIY expense is paint. Other expenses include buying or renting supplies and equipment, like caulk, primer, brushes, rollers, tarps and ladders or scaffolding. Freeman advises applying paint with brushes, not a sprayer. “If you overspray all the window frames and overspray your shingles and your sidewalks and the brick on the front of the house, you do damage that is not easily fixed,” he says.
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.