Raised Foundation vs. Slab Foundation

Patrick Melikian Avatar

Let’s compare raised foundations and slab foundations:

  1. Raised Foundation:
    • Description: A raised foundation allows the framing of the house to be above the soil. It typically has accessible crawlspaces.
    • Construction: The concrete footing extends partly below the soil (usually 12-18 inches) and can go higher. The sill plate attaches to the footing.
    • Benefits:
      • Accessibility: You can crawl under the house to fix plumbing or electrical issues.
      • Cold Weather: Handles frost layers better.
      • Sloping Areas: Less expensive on mountains or hills.
      • Flooding: Better flood resistance.
      • Construction Speed: Faster to build.
      • Remodeling Options: Provides room for storage.
    • Cost: Can be more expensive due to materials needed.
  2. Slab Foundation:
    • Description: The home is built directly on a thick concrete slab.
    • Benefits:
      • Simplicity: Easier to build.
      • Low Slope Sites: Ideal for sites with little or no slope.
    • Considerations:
      • Accessibility: Piping and electricity are fixed into the slab, making changes more challenging.
      • Climate: More advantageous in warm, dry climates.
      • Soil Type: May crack in expansive clay soil.

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