Concrete walls must always be prepared before painting, but in some cases previous finishes will also have to be removed so that paint doesn't peel or chip off. Additionally, special sealants, primers and paints may be applied to ensure concrete's endurance in face of the specific elements. Depending on the wall's condition and exposure to the sun, painting professionals will usually estimate between $500 (~250 sq. ft.) and $2,000 (~1,000 sq. ft.), depending on wall area to cover.
• One room or the whole house? Applying one coat in one room is a reasonable DIY Saturday project (especially if you have help and beer). Multiply the time spent moving furniture, prepping walls and sanding old trim by the number of rooms in the house, and you might want to hire real help. It's the same outside. You can probably tackle one shady garage wall that needs a little scraping and sanding plus a coat of paint, but covering all surfaces of the house is usually best left to a pro.
To paint a large section without leaving lap marks, roll the nearly dry roller in different directions along the dry edge, feathering out the paint as you go. After completing the entire length of the wall or ceiling, move to the next section and paint over the feathered edges. For the second coat, apply the paint in the opposite direction. This crisscrossing paint application sharply reduces (if not eliminates) lap marks.
Stucco is a specialized material that requires extensive preparation work (cleaning, caulking, filling in cracks, etc.). Additionally, paint suitable for rolling or brushing over stucco varies greatly depending on location and climate conditions. Some stucco paint varieties will chip and peel away in certain climate conditions, so painting professionals won't recommend them. These factors make stucco one of the more expensive siding materials to cover. You can expect to pay anywhere from $900 (~500 sq. ft.) to $3,000 (~1,500 sq. ft.) to have stucco revitalized with paint, depending on how much is needed to cover the home exterior.

how Much Do Home Painters Charge

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