![]() For this type of slab, footings are dug around the perimeter of the building to below the frost line. Mat slabs are used only in warm climates where the frost line is near the surface.Ĭold climates require a monolithic slab. The concrete may be a thick slab of uniform depth, known as a mat slab. Concrete Slab-on-GradeĪ slab-on-grade foundation is built by removing the topsoil, leveling the soil, and pouring concrete on top. Crawl space foundation walls are typically made of concrete blocks or bricks. Crawl SpaceĪ crawl space is an area below the living areas with a ceiling height of less than 7 feet. Older homes may feature brick or stone foundation walls instead. In newer homes, basement foundation walls are typically made of poured concrete. The basement floor is usually a nonstructural slab of concrete, though some basements have dirt floors. BasementĪ basement is often defined as an area mostly below ground with a ceiling height of at least 7 feet. Knowing your foundation type and materials will help you make an educated assessment of any foundation cracks and decide when to call in a professional. Types of Foundationsĭifferent types of foundations can have unique problems. Early detection and intervention are crucial to prevent further damage. If you notice new or expanding cracks in your home’s foundation, it’s worth paying for a foundation inspection Hire a structural engineer or other qualified professional to evaluate the cause and severity of the cracks, and complete any recommended repairs as soon as possible. Bulging: Part of the foundation wall protrudes outward from the rest of the wall.Rotation: Movement of foundation walls either inward or outward.Uplift: Upward movement of the foundation.Settlement: Downward movement of the foundation. ![]() Here are a few examples of foundational movement: However, larger cracks and those that grow over time could indicate a serious structural issue. The natural curing process of concrete can cause hairline cracks-less than 1/8 inch wide-to appear in the first few years after a home is built. Not all foundation cracks are cause for concern. They are fissures or breaks that appear in a home’s foundation walls or concrete slab. Foundation cracks are one of the most common foundation problems.
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