Standards register

Standard Test Method for Determining Relative Humidity in Concrete Floor Slabs Using in situ Probes

How relative humidity inside a concrete slab is measured, using probes placed in situ rather than a surface reading.

This is the test behind "was the subfloor moisture-tested" on a concrete slab. A surface reading is not this test, and a contractor who has done one has not done the other.

Primary source

store.astm.org/f2170-19a.html

Last verified

2026-08-20 · 1 day ago

Framework pillars

1. Moisture and acclimation · 2. Substrate and method

Criteria

1.1 — Was the subfloor moisture content measured, and were the rea… · 1.3 — Do both readings sit inside the manufacturer's stated accept…

Standard Test Method for Measuring Moisture Vapor Emission Rate of Concrete Subfloor Using Anhydrous Calcium Chloride

The calcium-chloride test — how much moisture vapour a concrete subfloor emits over a measured period.

The older of the two concrete moisture tests, and still specified by some manufacturers. Which test a warranty requires is a question worth asking before the slab is covered.

ASTM lists an open revision work item (WK96566) against this standard. The edition in force may change; check the issuing body before relying on a specific year.

Primary source

store.astm.org/f1869-22.html

Last verified

2026-08-20 · 1 day ago

Framework pillars

1. Moisture and acclimation · 2. Substrate and method

Criteria

1.1 — Was the subfloor moisture content measured, and were the rea…

Standard Practice for Preparing Concrete Floors to Receive Resilient Flooring

Preparation of a concrete floor before a covering goes down — flatness, cleanliness, and the condition the slab has to be in.

The substrate-condition half of pillar 2. Slab flatness discovered after a deposit is the most common source of change orders on a hardwood job, and this is the document that defines what "prepared" means.

Primary source

store.astm.org/f0710-21.html

Last verified

2026-08-20 · 1 day ago

Framework pillars

2. Substrate and method

Criteria

2.3 — Was the substrate assessed for flatness and condition before…

NWFA technical guidelines and publications

Installation, sand-and-finish and wood-species guidance for the North American wood flooring trade.

The trade body whose guidelines most manufacturer warranties reference. Acclimation periods, subfloor requirements and installation method by substrate all trace here.

The NWFA landing page does not enumerate current editions of individual guideline documents. This entry deliberately does not assert an edition or year — confirm the applicable document and revision with the NWFA directly before citing it in a specification.

Primary source

nwfa.org/

Last verified

2026-08-20 · 1 day ago

Framework pillars

1. Moisture and acclimation · 2. Substrate and method · 3. Product specification · 5. Dust containment and sequence