S500 Class-of-Loss Screen by Wetted-Surface Fraction
Turns the wetted-surface field read (how much of the floor and wall is wet, how high it wicked, whether low-evaporation assemblies are wet) into a candidate IICRC S500 Class of water intrusion and the matching per-class evaporation factor that feeds the load tiles. A deterministic screen that proposes a Class and states the rationale; the inspector's classification and a moisture map govern.
Formula and source
top-down (first match wins): Class 4 if low-evaporation materials wet; else Class 3 if wick_height_ft > 2.0 or wall_wet_fraction >= 0.40; else Class 2 if floor_wet_fraction >= 0.40; else Class 1. Output carries the matching per-class evaporation factor (gal/ft^2).
ANSI/IICRC S500 Class-of-loss definitions and the 24 in (2 ft) wick threshold, by name; thresholds are deterministic where S500 leaves a judgment band.
Audience
This tile is built for restoration and the adjacent professions in the Water Damage and Mold Restoration group. The interactive calculator runs entirely in your browser. No account, no fee, no advertising, no tracking.
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Posture
Rough Logic answers the math question the working professional asks on the job. The site is a calm, fast, ad-free, account-free, ever-free reference. It does not interpret code. It does not replace the licensed professional. It does not store your inputs. The Authority Having Jurisdiction governs all installations and inspections.