Foundation Forensics · Independent Evaluation Platform
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Published survey data is cited for context only and does not constitute a geotechnical investigation or engineering opinion. Parcel-specific subsurface conditions require site-specific geotechnical study by qualified professionals.
Upload a floor plan image (SVG, PNG, or JPG). Click on the canvas to place measurement points at their physical locations. Drag points to reposition.
Every distance this report derives from the floor plan — the § 3.6 segment runs, the § 5.2 deflection span, and the slopes computed from them — is a pixel measurement converted to feet. Uncalibrated, that conversion is an assumption, and a report that states a run in feet is asserting a measurement. Calibrate against one distance you know on site.
Horizontal sanitary drainage piping must be installed at uniform slope to maintain self-cleansing flow velocity (≥ 2 ft/sec). Differential foundation settlement alters the as-built slope, potentially reducing flow below self-cleansing thresholds, creating back-pitch (reverse slope), or exceeding joint-deflection tolerances — resulting in separations, leaks, and accelerating foundation damage via soil erosion.
Define the sub-slab sewer line path on the floor plan. The underlying elevation field is interpolated from measurement points in § 3.0 / § 3.5.
Most Texas homeowners policies may cover foundation repair when movement is attributable to a plumbing leak, provided the claim is filed before remediation begins. The claim summary consolidates findings for adjuster review.
Deflection ratio (Δ/L) — bending. ASCE Texas Section Version 3 (2022) § 5.4 defines it as the maximum deviation of a third point from a straight line between two points, divided by the distance (L) between the two points. This tool searches every pair of plan-located points as a candidate chord and reports the governing (worst) triple. L is the chord length, not the overall plan extent. Tilt — rigid-body rotation, taken as the gradient of a least-squares plane fitted through the same points and expressed as a percentage. A slab can carry substantial tilt with no bending at all, and the two are reported separately for that reason. Elevation range — the arithmetic spread of the readings. It contains both effects and is not, by itself, either one.
What the source actually says, and its limits: § 5.5 cites the IRC allowable live-load deflection of L/360 for a structural floor member and offers it as an analogy — the whole foundation treated as one member, differential soil movement as live load — adding that below L/360 the foundation is unlikely to be materially deflected unless visible indications show otherwise. § 5.6 states that a tilt greater than 1 percent is usually noticeable and that the ADA considers a 2 percent slope too large. Those are the only numeric figures in the document. L/240 does not appear in it, and it contains no severity or damage classification table. Noticeable is not the same as damaged, and this tool computes the values without asserting either.