The 1970s Ranch with a Cracked Foundation and a Finished Basement
You are inspecting a 1974 ranch with a finished basement. In the unfinished utility area, you see a vertical crack in the poured concrete foundation wall, about 1/8 inch wide at the top and tapering to hairline at the floor, running from the top of the wall down about four feet. There is a white, powdery deposit along the crack and a dark stain on the concrete floor below it. The finished portion of the basement has a drop ceiling, carpet, and drywall; the drywall is tight to the floor with no visible gap. The homeowner says the crack 'has been there for years and never leaked.' The lot slopes toward the house on the north side, and a downspout on that side discharges within 12 inches of the foundation. Your agreement excludes structural engineering opinions and states you do not determine the cause or future performance of cracks.
1. How should you characterize the crack and the efflorescence, and what should you recommend?
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The crack is a vertical shrinkage or settlement crack - the tapering pattern (wider at top, hairline at bottom) is typical of shrinkage or minor settlement, not of a shear or differential-movement crack that would typically be wider at one end or offset. But the efflorescence and floor stain indicate that water has moved through the crack at some point, whether or not it is active now.
The homeowner's 'never leaked' is not evidence; it is a claim. Your job is to report the observable conditions:
- Crack dimensions and pattern.
- Efflorescence (evidence of moisture migration).
- Floor staining below the crack (evidence of past or current water).
- The north-side grading and downspout discharging within 12 inches of the foundation (a moisture source).
Recommend: (1) correction of the grading and downspout extension to move water away from the foundation; (2) evaluation by a licensed structural engineer or foundation contractor to determine whether the crack is active and whether repair is needed; (3) monitoring for further movement. Do not opine on structural adequacy or future performance - your agreement excludes it, and you lack the engineering basis to do so.
2. The finished basement drywall is tight to the floor. What does that mean for your inspection, and how do you report it?
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Drywall tight to a basement floor is a concealment condition. It hides the bottom plate, the slab edge, and any evidence of water intrusion, wicking, or insect activity at the most vulnerable part of the wall. It also prevents you from seeing whether the wall is furred out, whether there is a moisture barrier, and whether the slab has heaved or settled.
You should:
- Report the limitation - the lower portion of the foundation wall and the slab-to-wall junction in the finished area were not visible.
- Note the condition itself - drywall installed tight to a slab is a recognized moisture-risk detail in basements, because it can wick water and hide damage.
- Recommend that the buyer consider having the finished area evaluated by a qualified contractor, and that any future renovation include a gap or moisture barrier at the slab.
You should not cut into the drywall or remove baseboard. The correct CPI behavior is to document the concealment, explain why it matters, and refer - not to guess at what is behind it.