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Indoor airPLUS

Technical Guidance to the Indoor airPLUS Construction Specifications

1. Moisture Control

Sections 1.11 - 1.13: Interior Water Management

1.13 Do Not Install Materials with Water Damage

Do not install building materials that have visible signs of water damage or mold. In addition, interior walls shall not be enclosed (e.g., with drywall) if either the framing members or insulation has a high moisture content. For wet-applied insulation, follow the manufacturer’s drying recommendations.

Advisory: Lumber should not exceed 18% moisture content.


Installing building material on which mold is growing would simply transport mold into the home occupant's environment. Rain, sleet and snow are all part of home building; although stored or staged building materials should be protected from the elements, materials can still become wet after they are incorporated into the structure (as rough-framing and sheathing, for example) but before the home is roofed and otherwise made weather-tight.

Materials that are not allowed to dry sufficiently can support mold growth. Wet-applied insulation must be allowed to dry for the same reasons.


Visually inspect building materials and use a moisture meter to test any that are questionable. Allow material to dry sufficiently.

Detailed Illustrations

Moisture meters

Moisture meters

(Click on the image for a full-page version)

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