According to Craftsman National Estimator, "High time difficulty factors for surface preparation and painting. Painting takes longer when heights exceed 8' above the floor. Productivity is lower when an application requires a roller pole or wand on a spray gun or when work is done from a ladder or scaffold. When painting above 8', apply the following factors:
While some professional painters will charge a flat fee for a painting project, most charge an hourly rate—about $25 to $100 per hour on average. Most painters will charge more for last-minute jobs (think 48 hours' notice or less), travel costs (if you live far away, the painter may want extra money for gas), or intensive prep work (e.g., removing mold or stains before painting). Also, depending on the painter, the rate may or may not include the cost of paint materials such as paint, primer, and supplies. House Painting Thornton

A moisture meter will let your contractor know if there’s moisture in the stucco before starting. The wetter the material, the less ready it is to be sanded, painted, finished or covered. Your contractor will use a premixed stucco repair patch material to fill any small holes and will paint on dry days to avoid sealing in water. Painting rough stucco requires more paint. Brush painting stucco costs $112 per 100 sq. ft., roll painting costs $55 per 100 sq. ft., and spray painting stucco costs $25 per 100 sq. ft.
Paint sheen is determined by the ratio of resins and binders to pigment levels in the paint. Paints with a high level of resins/binders create a high-sheen, shiny surface, while those where the pigment levels are high, create a less reflective surface. Generally speaking, glossier paints are more durable, while flatter paints are less resilient but cover better. 
To the touch, they still have the chalky feel of flat finishes, but with a slight waxy smoothness. The same paint color will appear slightly richer in a satin sheen than it does in a flat sheen. Satin/eggshell finishes can be wiped down or even hosed with water. Because of the hint of shine, satin paints have a somewhat more luxurious appearance than flat paints.  Thornton Home Painting
Aside from the size and the material of your home, there are several factors that affect how much it costs to paint your home. If you paint the home yourself you’ll almost certainly spend less than you would if you hired professional painters. If you’re doing a cost comparison, remember to include the cost of painting equipment when you’re tallying the cost of a DIY paint job. You’ll need a ladder, brushes and buckets in addition to the paint itself. For an interior job, you’ll probably want tape and a drop cloth. Thornton House Painting
Once you have the approximate square footage that you’ll need to paint, remember that a gallon of paint generally covers between 250 and 400 square feet. You’ll need more if you’re painting a rough, porous material, or if you want to paint a dark house a much lighter color. Depending on your color choice, you may need a more expensive tinted primer to help with the color transition. House Painting Thornton
O'Neil patches shallow holes and divots with Ready Patch because it dries fast, sands smooth, and stays flexible. Deep cracks and rotten spots are best repaired with two-step epoxies, such as those made by Advanced Repair Technology. (For a step-by-step instructions, see Repairing Rot with Epoxy.) The days of using polyester auto-body fillers on wood are over. "They cure too hard," says Portland, Oregon–based painting contractor Kathleen George. "They look good at first, but then they peel away." Thornton Home Painting
Two aesthetic things to consider when selecting a finish are how shiny you'd like the surface to be and whether or not you want to hide any imperfections on the surface to be painted. Generally, higher-gloss paint finishes reflect light better than lower-gloss finishes, like eggshell and matte. That makes them shiny, and also causes them to highlight flaws in walls and ceilings. Thornton House Painting
While you may choose to paint a door, ground-level window trim and other parts of your house’s exterior, it’s really a job best left to the professionals. One of the main reasons is experience. An experienced painter knows how to handle the prep work, spot problems and identify sources of future trouble, all while getting the job done more efficiently. They are also experienced with spending long hours on tall ladders. If you want high-quality work, it’s best to hire a professional painter near you.  Thornton House Painters
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