What are the 3 types of foundations?

April, 30 2021

Types of foundation


Foundations are the load-bearing portion of a structure, and they’re built below the ground to support the structure above. They distribute the structure’s load on the soil and keep it less than the soil’s bearing capacity.


Different houses are generally built on different foundations, depending on the geographical location and climate, house design, project budget, soil, and moisture conditions. However, the three commonly used types of foundation are:


1. Full basement


This is the deepest of all the three foundation types, and it’s usually at least six feet high. It matches most or all of the floor space above, and in newer homes, the full basement is taller to facilitate ADU conversions.


Full basements provide added living space, and they can be conditioned like the rest of the home or remain unconditioned. They usually consist of structural foundation walls, bearing on foundation footings that run along the basement’s perimeter. In modern homes, the full basement is made with mortared or poured concrete.


2. Concrete slab-on-grade


Slab-on-grade refers to concrete that rests on the ground. They’re commonly used in regions that don’t experience ground thawing or freezing, and they’re less expensive than the other types of foundations. Additionally, slab-on-grade provides better protection against termite infestation.


Unfortunately, since drainage and water supply pipes are embedded in the concrete, you’ll have to cut through to access the pipes in case of a problem.


3. Crawlspace


These are foundations that create a crawlspace, unheated spaces that can be used for storage or a furnace. Since crawlspaces don’t require as much excavation as full basements, they’re less expensive. You can ventilate crawlspaces with small vents, promoting airflow.


Importance of foundation for geotechnical engineering


Geotechnical engineering involves investigating the behavior of earth materials by using principles of soil and rock mechanics. It aims to determine these materials’ physical, mechanical, and chemical properties while assessing the risks posed by site conditions. Additionally, it monitors earthwork and foundation construction.


Foundation is a vital aspect of geotechnical engineering as it applies the knowledge of soil and rock mechanics, geology, and structural engineering to design and construct foundations for structures. Additionally, it calculates the bearing capacity of deep and shallow foundations.

For safe, secure, and responsible construction, you need to support your projects with our geotechnical and geological experience. Contact G3Soilworks to maximize the productivity and profitability of your construction projects in Southern California.


Follow, engage, learn. Stop by our blog to see what’s happening at G3SoilWorks.

G3SoilWorks – a full service geotechnical / engineering geologic consulting firm, is pleased to reach our third year. It has come with many interesting clients, assignments and obstacles.

350 Fischer Avenue Costa Mesa, CA 92626

Tel. 714-707-3155
E. info@g3soilworks.com