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. House Painting
Prep the house. Wash the walls, remove wallpaper, patch, spackle, seal stains, dry and sand before you attempt to paint. Now is also the time to apply painters tape for trimming, lay drop cloths, etc. Remove all outlet and light switch face plates, collecting screws in a zip-top bag (good opportunity to wash the face plates all at once as well). You can also buy your paint at this time. Don't wait until the last minute. It can take hours to mix many gallons of all your colors. Remember that traffic triples at your home-supply and hardware stores on weekends. Buy on a weekday if possible.
When painting a carpeted room, keep in mind that paint will soak through drop cloths. This is especially true of the cheaper, lightweight cloths. It helps to tape masking paper to all of the base boards before laying the drop cloths. Tuck the edges of the cloth under the paper--this will help keep it clean. You might want to invest in a hand-held masking machine--they make the job go much faster. Even after taking these precautions make sure to clean big drops or spills before they soak through and before you step on them! House Painting