Exterior house painting may seem similar to the interior wall painting exercise but some critical differences exist between them. Preparing and maintaining exterior surfaces is considerably different than preparing indoor surfaces where weather damage. Exterior house painting requires more time and effort instead of interior painting. How often you need to repaint the exterior of your house depends on few variables, where you live, the type of materials your house is made with and the quality of the materials you use for the project. Depending on where in the world you live, the exterior paint on your home will have different needs. Coastal homes, for instance, endure intense sun, salty sea air and sand and exposure to those elements means you'll probably need a lot more exterior upkeep on your home. A home on the beach may need to be repainted as often as every year.