Most of us can do an okay job of painting a room. But a seasoned professional does a great job. Obviously, pros have more experience than the average homeowner, but they also know techniques and tricks that make them better painters. We asked six pro painters to share those secrets. They probably kept a few tips to themselves, but they provided us with more than enough to help you work more efficiently and get better results. Some of what you'll read may surprise you. For instance, their secrets won't cut painting time. Painters spend two to four days on an average-size room. That's how long it takes to prep, prime and paint correctly. It's more work, but when you stand back to admire the results, you'll agree it's time well spent.
A can of paint is generally labeled "low-VOC" if it has less than 100 grams of VOCs per liter for flat sheens and 150 grams for nonflat. Cans that meet standards set by Green Seal, an independent tester and certifier of paints, have even less—no more than 50 grams per liter for flat finishes and 100 grams for nonflat. A "zero-VOC" paint can't have more than 5 grams per liter, according to Environmental Protection Agency standards.

Determine the coverage area for each color and estimate the number of gallons you'll need for each. For odd walls with angled ceilings, make your best guess. If you're not comfortable doing this, measure the wall at its highest height and multiply that by its width. Now subtract the lowest height from the highest height, multiply that number by the width, cut that answer in half, and finally subtract that new number from the original height by width. That should give you the wall area.
The graph says the average cost to paint a home interior is $1600; at the high end, $4,000. But for what size home? I'm getting estimates for painting an 1800 square foot townhome in the range of about $6500 - which includes sanding and repainting all doors, and painting all trim, walls and ceilings. What does the range above include and for how big of a home? Thanks.

Home Interior Painter