There are some confusions among civil engineering students as well as professionals on relative differences among slab foundations, crawl space foundations and basement. So we have decided to write a post on this topic. First, we will go through the basic concepts of each of the topics and then we will summarize the relative differences between slab foundation, crawl space foundation and basement in a comparison table.
Slab foundations are usually around 6 to 8 inches thick. The house sits on the slab, which means no floor support system is needed. In an area where ground water and drainage is a problem, then a slab foundation is not a good option, but in areas with good drainage and few groundwater problems they are ideal. They are cheaper than most other foundation options and are often quicker to install, which means they keep house building costs down.
Crawl Space Foundations
It is a space left in between home and the ground. Crawl space is typically between two and three feet, and stem walls extend from the footings around the perimeter of the foundation, though sometimes beams and piers are used instead. If there is a high moisture content and possibly poor drainage, then it is better to use a crawl space foundation as it helps to stop water from building up. They do require more excavation and more installation time than slab foundations, but are not overly expensive because of it. Some people are concerned about rodents getting into the crawl space under the house. But if there are spaces for cats to wander in, then it is rarely a problem. You can also check the crawl space repairing facts.
Many people prefer a house with a basement because they make excellent storage rooms, and they often offer a lot of soundproofing when compared with the rest of the house. Some people install windows and turn the room into a bedroom, dry storage area, or games room. They often improve the selling price of a house, and allow plumbers and electricians easy access to the house. They also make installing insulation a lot easier too. There are few basement foundations in places with a high water table, such as Miami, because the water may cause flooding or cracks in the foundation. If you are looking for an extra room, then a house with a basement may be suitable, but the ground you build upon and the local environment may restrict your choices.
Difference among slab foundation, crawl space foundation and basement
Let’s summarize the differences as slab foundation vs crawlspace vs basement comparison table for easy understanding as below.