Paint primer costs $10 to $30 per gallon can on average and ensures the paint sticks the surface evenly. Most jobs require a primer, especially if the wall has been painted over, the walls had wallpaper or a textured surface, or for a more drastic color change. Use a latex-based primer with latex paint and oil-based primer with oil paint. A stain-blocking primer offers mildew resistance and blocks most stains from bleeding through the paint. Paint-and-primer combo products are suitable for repainting the same color, or small touch-ups. How Much Paint Do I Need For A Room?
These temperature swings cause your home to expand and contract. Due to this expansion and contraction you will see seams cracking, swelling on the edges of your boards and around your nail heads. These are usually the first signs your home needs to be repainted!

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The total cost to paint the inside and outside of an apartment ranges between $3,553 and $10,150; however, it is relatively rare for apartment dwellers to receive permission to paint the outside of their home. Therefore, examining the average cost to paint just the inside might offer a more accurate picture of painting an apartment. The cost to paint the interior of an average-sized apartment ranges from $2,030 to $6,090.