Types of House Foundations

Written by stephanie daniels
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The foundation of a house or any other building provides a flat surface for the home to sit on. The foundation shoulders the weight of the house and even disperses the weight so the house does not cave in where support is not offered. The foundation also separates the home's wooden frame from the ground, preventing rot caused by water damage and termites.

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Slab Foundation

A slab foundation is a single, solid slab of poured concrete that the constructed house will sit upon. A slab foundation is created by filling a concrete block or wooden frame with concrete and allowing it to harden. Unlike other types of foundations, slab foundations leave no room for moving underneath the completed house to install air ducts or electric receptacles.

Crawlspace Foundation

The crawlspace foundation is a hollow block or poured concrete frame that provides enough room between the base floor of the house and the ground for a person to crawl underneath. The crawlspace allows room for electricians or HVAC technicians to install electrical circuits and complete wiring projects or install and cut holes for air-conditioning ducts.

Pile Foundation

The pile foundation is a variation of the crawlspace foundation. The pile foundation leaves a crawlspace between the ground and the base of the house, but along with an outer frame, concrete piles or columns also are poured to provide additional support throughout the centre of the house. Large support walls in the home will be placed over these piles or columns.

Spread Foundation

The spread foundation is used to make both crawlspace foundations and basement foundations. The spread foundation consists of a concrete or block frame along the outer perimeter of the house. The foundation is considerably thicker than the walls of the home, allowing the weight of the home to spread out over the foundation.

Basement Foundation

A basement foundation leaves a large distance between the base floor of the house and the ground. A basement foundation has an open space large enough for an adult to stand upright. Such foundations are often used for garages or transformed into family rooms or walkout basements.

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