Types of House Foundations for Home Construction

A slab foundation is simply a poured slab of concrete that a house is built upon. A Slab foundation usually sits upon a footing that has been constructed below the frost line. The concrete slab is typically 4 to 8 inches in thickness with embedded steel rods known as “rebar” to prevent cracking and faulting. The house foundation is built directly on the soil with no basement or crawlspace. All water lines and waistlines are installed prior to the concrete being poured.

SLAB FOUNDATION ADVANTAGES

One of the main reasons slab foundations are popular is the cost factor. Slab foundations are the least expensive and the quickest to install. Slab foundations reduce the cost of the entire building simply because the houses built directly on the slab. That saves the cost of floor joists that would normally support the building. Slab foundation homes are easier to heat because there is no airspace under the house affecting the interior temperatures.

SLAB FOUNDATION DISADVANTAGES

Because there’s no basement or crawlspace all ventilation duct-work must be channeled through the attic and through spaces in the walls. There is no additional space for utilities and no storage, the entire home is basically sitting on a large platform of solid concrete. Although slab foundations are the least expensive house foundations to construct, they’re the most expensive to repair. All the plumbing for the home is basically under the concrete slab making it impossible to repair without tearing up concrete floor which is now part of the interior of your home. Leaks are difficult to detect because they’re under the slab and in many cases go undetected for years. An unusually high water bill is the first indication that you may have an underground leak.

THE SECOND OF THE THREE TYPES OF HOUSE FOUNDATIONS-CRAWLSPACE

Crawlspace foundation consists of a perimeter concrete wall and concrete columns that will support the floor joists of your home. The distance between the soil and the first floor of your home is known as the crawlspace.this foundation is either built the ground level or over shallow excavation depth from 3 to 4 feet. The exterior foundation walls will support the building load and several concrete Piers will be constructed in the crawlspace for extra support. Crawlspace foundations in the past have been built using the original soil as the floor, and recent changes in building codes are now insisting on at least a two inch cement flooring to be used to help control any moisture problems.

CRAWLSPACE ADVANTAGES

A Crawlspace foundation raises the home 3 to 4 feet above the ground level. This has many advantages, all the plumbing and wiring and ventilation ducts can easily be maintained and serviced. In addition to providing access under the home crawlspaces allow airflow under the home. This will assist in cooling in the summer, crawlspaces are usually cool when properly ventilated.

Crawlspace House Foundations in Flood Areas

If you live in an area that is prone to flood, having a crawlspace foundation is …

Read more