When you are looking to buy a home, the first thing you should determine is the type of foundation. The foundation is the first part of the home constructed and sets the groundwork for the remainder of the home. This is the most important part of the house and a properly designed foundation bears the weight of the entire house while protecting it from the climate, moisture, ground movement, etc. There are a few main types of foundations used by builders depending on factors such as the budget, location, soil, type of house and climate. The main types used are Slab, Crawlspace, and Basement.