Exterior paint averages $25-$40 a gallon, and a 3,000-square-foot home takes 15 or more gallons of paint, or $375-$600 just for the paint. However, really premium paint can cost $50-$100 a gallon, or $750-$1,500 for that large home. Doing it yourself also requires renting a pressure washer or sprayer for $50-$100 a day; extra-long ladders or scaffolding at $20-$75 daily; and a power sprayer for $50-$100 daily, plus masking tape, drop cloths and other supplies. However, it's possible to paint a large, two-story house for materials-only costs of $400-$600. Thornton Home Painting

Once you have the interior square footage calculated, experts say you’ll want to divide by 350. 350 square feet is the average coverage of a gallon of paint (though some say 250-400 square feet). The average coverage for a gallon of primer is 200 square feet. Your square footage divided by 350 square feet gets you the number of gallons of paint you’ll need. Square footage divided by 200 gets you the number of gallons of primer you’ll need. You can save money by ensuring you don’t buy too much paint.

Having a professional paint your home from top to bottom, inside and outside has a number of advantages. For one thing, it'll save you a ton of time by not having to do the work yourself. In addition, you won't have to be concerned about safety issues, such as climbing a ladder to paint your house's gutters. Best of all, you can expect a clean, attractive finished product from a professional painter.
Exterior paint averages $25-$40 a gallon, and a 3,000-square-foot home takes 15 or more gallons of paint, or $375-$600 just for the paint. However, really premium paint can cost $50-$100 a gallon, or $750-$1,500 for that large home. Doing it yourself also requires renting a pressure washer or sprayer for $50-$100 a day; extra-long ladders or scaffolding at $20-$75 daily; and a power sprayer for $50-$100 daily, plus masking tape, drop cloths and other supplies. However, it's possible to paint a large, two-story house for materials-only costs of $400-$600. Thornton House Painting
Small random-orbit or pad sanders make this job go faster. (Wallis first covers these boundaries with Synkoloid patching compound so no edge is visible after sanding.) As shown, you want to make sure that there is a feathered, smooth transition from exposed wood to old paint. For areas that might get close scrutiny, you can follow up with a 100- or 120-grit rubdown to erase any scratches.
Some siding on older homes might need so much repair that it is more cost-effective to replace the siding rather than repair it all and then paint over it. Expect to pay between $1,550 and $3,050 for the removal and disposal of old siding and $4,000 to $14,000 for new siding and installation. Expect to pay more if the wood underneath is wet and rotten and needs structural repair work.

Expect paint supply costs to run between 15 percent and 25 percent of the total job. If you're using premium paint, expect to spend between $50 and $100 per gallon. Included in the estimate is the number of gallons that are needed as well as the number of coats that will be applied. Other supplies could include brushes, scaffolding and even power washers, depending on the scope of the paint job. This should be an itemized list that's easy to understand, with every dollar accounted for.
Can you balance blues, whites, and reds on a home exterior without going the full-on patriotic red, white, and blue route? Taylor Cabot, a Portland, Oregon architect, did just that with his 1923 cottage. Saying that he most decidedly "did not want the house to look like an American flag," he went with a deeper, shadier blue for the main body of the house. The red, too, was not a bright patriotic red but, like the blue, was shaded down into a darker maroon.  Thornton House Painting
Exterior paint prep can be a daunting task to tackle. Depending on the size of the project and your experience level, you might not even know where to begin. Like everything, the best way to start is with a good plan. Identify what parts of the project can be broken into sections and what parts need to be done together. Look for areas that will cause you trouble, so that you can approach them with your eyes open. The planning stage is also the best time to consider testing for lead paint. If you have a house that was built prior to 1979, it's always a good idea to know what you're getting into. This is especially important because it's likely that you'll need to sand or scrape your existing exterior paint during the course of your project. See this Family Handyman article Testing for Lead Paint for more details on how to easily and affordably find out if you have lead paint. Thornton House Painters

Staining a deck costs $540 to $1,000. Covered porches might hit $2,000. Consider negotiating the price a bit lower by combining it with a full exterior job. Painting handrails can run anywhere from $1 to $2 per linear foot, depending on whether it’s wood, metal or some other material. Although you might think this is an easy $30 to $100 job, most painters charge a minimum fee regardless of the size of the project. You’ll probably end up paying at least $150.
One pro tip: the term mineral spirits and paint thinner are sometimes used interchangeably. They are actually very similar. But mineral spirits are more often used indoors because they have lower fumes. Paint thinner is less expensive but has a high VOC (Volatile Organic Compounds). See Mineral Spirits vs. Paint Thinner for a complete run down on the differences between these two products. Thornton House Painters
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