The external part of the house is as important as the internal part. It is therefore essential that the part of the external house should be taken care of just like as how one takes care of the internal parts.  Below are some of the strong points that one should remember on how to take care of the exterior parts:
a.        You should take a look at roof part of the house as this is more exposed to sun rays, dust, and dirt.  One of the best ways to protect the roof is to repaint it from time to time.  The paint on the roof protects it from getting rusty and old.  You need to remember that the more exposed your external part to humid, sun, and dust, the faster it gets old and rusty.
b.      You should also check on the house foundation against wood eating insects such as termites. More often, the problem with the foundation is that it weakens as time passes by not because they are exposed mainly to dust and dirt but because it is being attacked by termites - the main enemy of the wood foundation. 
These are two of the best ways on how you can protect the exterior part of the house and maintain it strong and healthy.