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Slab vs. Pier-and-Beam Foundations
Slab-on-grade
Most modern Texas homes sit on a concrete slab with thickened perimeter and interior beams, sometimes post-tensioned with steel cables. On expansive clay, the slab edge tends to move with soil moisture. Repairs usually involve piers under the beams.
Pier-and-beam
Older homes, and some newer ones, are raised on piers with wood beams and joists above a crawl space. Common issues include settled or deteriorated piers, rotted sills, sagging joists and crawl space moisture. Repairs often involve re-shimming, adding or replacing piers, and beam work.
Pros and cons
- Slabs are economical and common but harder to access for plumbing work.
- Pier-and-beam allows easy access underneath and is often simpler to re-level, but needs ventilation and moisture control.
FAQ
Which foundation type is better for Texas clay?
Both can perform well when designed for the site. Each just fails in different ways and needs different maintenance.
How often does pier-and-beam need leveling?
It depends on the home and soil. Some homes go many years between adjustments; others need periodic shimming.
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