- Introduces the need for an improved approach to moisture testing for flooring installations on concrete substrates, as traditional methods are not always accurate predictors of moisture conditions.
- Defines important terms related to moisture in concrete like moisture content, relative humidity, vapor pressure differential, dew point, alkaline salts, curing vs drying.
- Discusses sources of moisture in concrete like mix water, ground moisture, vapor pressure differences. Explains how alkaline salts can artificially lower moisture readings.
- Describes indicative (informal) tests and controlled (formal) tests used to assess moisture conditions. Identifies limitations of traditional tests like ASTM F1869 and ASTM F2170.
- Recommends using ASTM F2659 in combination with F1869 and F2170 to better map moisture across large areas and identify problem zones requiring mitigation.
- Outlines responsibilities and testing requirements for project participants like the constructor, subcontractors, manufacturers.
- Provides guidance on concrete mix design, placement, finishing, curing, protection, and establishing drying conditions.
- Discusses temperature/humidity controls needed during construction and importance of the permanent HVAC system.
- Defines quality management program requirements and pre-construction coordination activities.
- Details specific moisture testing procedures, frequencies and acceptance criteria.
- Provides recommendations for removing excess moisture from concrete if needed.
- Includes appendices defining terms, contextual concrete info, managing drying conditions, and a sample specification.