The exterior of the house is part of easily exposed to dirt and fungi. Therefore, the section is part of the weather-exposed directly. So, you should get a good painting technique and choose a good quality paint. You can visit http://www.onemanandabrush.com for more information on proper painting.
Part exterior always exposed dirty you should always clean. There are some easy-to-find materials in the house that can be used to clean your walls, like
– Lemon Lemon Water
You can use lemon juice that has been mixed with water and put it in the spray bottle. Spray the fluid on the stained surface of the wall. After the staians have been removed from the walls of the house, you can clean them with a clean cloth.
Vinegar has an advantage because it can be used on walls that have mushrooms and mildew. You can mix water and vinegar and clean the dirty walls gently with a circular motion.