Why DFW is the foundation capital of the US
Houston is wetter. Phoenix is hotter. But DFW has the worst combination: expansive clay soil + drought-rain cycles + builders who skip pier-and-beam for slab-on-grade to save cost. The result is that 30-50% of DFW houses over 20 years old have had some foundation work. Many sellers do not disclose it. The Texas seller disclosure form has a foundation question; "I don't know" is the most common (and often dishonest) answer when the seller bought the house as a rental and never lived in it.
Red flag 1 - Visqueen / plastic sheeting under decks or against the foundation
Visqueen is contractor-grade plastic sheeting. It is the cheap waterproofing shortcut: lay it along the foundation, backfill on top, cover with a deck. The water never actually drains - it pools against the foundation and finds the basement or crawlspace within 1-2 wet seasons. If your inspector did not check under the deck, push back hard. Texas law requires inspectors to either inspect a structural area or document why they could not.
Red flag 2 - Sill plate replacement without a foundation permit
The sill plate is the wood that sits on top of the foundation. Rot here means the foundation has been wet long enough to damage structural lumber. Replacement is permitted work. If you see fresh sill plate but no foundation permit on file at the city, the work was likely done by an unlicensed contractor or the seller acting as their own contractor. Either way, no inspection happened. This is the exact pattern that broke the Indiana buyer's deal.
Red flag 3 - Below-grade entry enclosed by a deck
Below-grade entries (basement walkouts, cellar doors) need drainage and a proper concrete pad. Enclosing one under a deck without drainage means every rain becomes a pond on top of the foundation. Look for: a deck that ends right at the foundation wall, a slope toward the house instead of away, missing drain tile or French drain.
Red flag 4 - Grading slopes toward the house
Walk every side of the foundation. Soil should slope AWAY from the house at minimum 6 inches over the first 10 feet. If it slopes toward the house, every rain is foundation pressure. Many flipped houses get fresh landscaping that re-grades wrong.
Red flag 5 - Fresh paint on lower courses of brick / siding
Recent paint on the lower 3 feet of an exterior wall often hides efflorescence (white mineral deposits) from prior moisture intrusion. Run your hand along the wall - chalky residue under the new paint is a tell.
Red flag 6 - Recent flooring replacement on the same floor as the foundation issue
New flooring is the universal cover-up. Pull a section of baseboard (with seller permission, during inspection) and check the framing behind for moisture meter readings or staining.
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Full Guide Contents
Continue Reading - Realtor Plan
Full guide includes: the 15-item structural inspector checklist we generate on every Realtor-tier Home Buying Audit, sample engineer scope-of-work, and a comparison of three DFW foundation repair companies that will actually pull permits.
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