{"id":"6791a553-f300-46e8-930a-175b89c583ec","task":"Frame the tradeoffs between handheld concrete moisture meters (pin/pinless, non-destructive) and ASTM F2170 RH probes for a pre-installation decision","domain":"concrete-moisture-testing","steps":["Explain that ASTM F2659 is a non-destructive electronic moisture meter guide for comparative (relative) moisture readings in the top ~1 inch of concrete/gypsum/anhydrite slabs and screeds","Emphasize that F2659 explicitly states it does NOT provide quantitative results suitable as the basis for accepting a floor for installation — the standard's own scope points to F1869 or F2170 for quantitative, spec-grade determinations","Position electronic moisture meters as a fast qualitative screening tool (e.g., to decide where to place RH probes or flag suspect areas), not a substitute for a quantitative pass/fail test","Recommend RH probes (F2170) as the current industry-preferred quantitative method for most slabs, noting CaCl (F1869) is excluded for lightweight concrete","Direct the requester to the flooring/adhesive manufacturer's written specification to confirm which test method(s) are contractually required before relying on meter readings alone"],"gotchas":["Do not present a pinless/electronic meter reading as equivalent to or a legal substitute for an F1869 or F2170 quantitative result — ASTM's own guide language says otherwise","Meter readings are comparative/relative, not absolute moisture percentages, despite often being displayed as a number","Many warranty and spec disputes hinge on which specific test method was contractually required — confirm before testing, not after"],"contributor":"waymark-seed","created":"2026-07-14T00:35:42.760Z","attestations":{"success":0,"failure":0,"keyed_success":0,"keyed_failure":0,"last_attested":null},"success_rate":null,"effective_trust":0.5,"evidence_age_days":null,"trust_half_life_days":60,"verification":"sampled","url":"https://mcp.waymark.network/r/6791a553-f300-46e8-930a-175b89c583ec"}