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Chapter 3 - Finding Mold and Moisture

Lesson 2 - Equipment

Chapter 3 - Finding Mold and Moisture

Lesson 1
Where to look for mold contamination - building investigation

Lesson 2
Equipment

Lesson 3
Mold Sampling Considered

BEGIN KNOWLEDGE TEST

In general, the most important equipment is your own eyes and nose, although a good flashlight may help. Some investigators use a borescope to look for mold growth behind walls without significantly damaging the drywall. (A borescope is an optical probe, inserted through a small hole drilled into a wall, that lets an investigator inspect a small portion of the wall without causing extensive damage.) High humidity in a building can lead to mold growth, so humidity gauges may be useful for checking or monitoring humidity throughout the building.

Moisture meter, showing high moisture content in gypsum board behind tile.
Click image for larger version

Many investigators use moisture meters to find wet areas where mold may be growing. These meters measure the moisture in many types of building materials. They also can monitor the process of drying these materials. A moisture meter typically has a thin probe that can be inserted into the material to be tested or pressed directly against its surface. Moisture meters can be used on carpet, wallboard, wood, brick, and concrete. Because mold often grows where moisture is high, a moisture meter can help an investigator locate hidden areas of mold growth.

The use of personal protective equipment (PPE) should be considered during a mold investigation. The primary function of PPE is to avoid inhaling mold and mold spores and to avoid mold contact with the skin and eyes. Professional judgment should be used when selecting PPE. (See Table 1 for more on PPE.) The use of PPE is indicated when mold is disturbed and likely to become airborne during an investigation. There are also other situations when PPE should be used based on professional judgment. Anyone using respirators and other PPE in the workplace must be trained, must have a medical clearance, and must be fit-tested by a trained professional. Note that all Occupational Safety and Health Administration (OSHA) requirements must be met. (See the Resource List.)

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