What caused houses to go from having crawl spaces underneath to being on a concrete slab, no space underneath?
In: Engineering
slab houses are super cheap to build. They became very popular in post-war mid-century modern style houses like the ranch. Building during that time needed to be fast and inexpensive. It also had to become more efficient in the use of materials as the demand for post-war housing strained the supply of building materials. You still see basements in the In the North and North East but outside of freezing climates basements become and unnecessary expense.
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