Our Moisture Testing Process

We determine our approach to each inspection by first performing a visual inspection of the property, looking for known areas of vulnerability, irregularities, installation and/or material defects, etc. to the create a list of red flags. After assessing this list, we create a plan of carefully selected test sites. The report indicates the results found at each test site with an appropriate action to take, if needed. 

Probe Testing

When probe testing exteriors, such as stucco, to check the sheathing for moisture and resistance, we use the Delmorst BD-2100 Moisture Meter at scale 1 for wood and wood based sheathing with moisture level readings ranging from 6-40%. Scale 3 is used for gypsum board/drywall with moisture level readings ranging from 0.1 to 50%. This tool as decribed here is used in accord with accepted industry standards in moisture testing. 

Structural Resistance 

Tested through the same holes as probe testing, structural resistance testing is done with a compatible Delmhorst guage to measure pin penitration into the sheathing behind the siding to check for possible evidence of moisture damage. 

Wall Scanning

When testing surfaces that can be checked with non-intrusive means, such as vinyl siding, we use a Tramex Exterior Wet Wall Detector at Setting 4.5, according to industry standards.

Moisture Ranges: 10 - 20% = Low 21-50% = Medium 51-100% = High 

Thermal Imaging

When performing our inspection addtional tools of the trade, such as hand held moisture meters and thermal imaging cameras, may be used at the discretion of the inspector. 


NOTE: The test equipment is used to help locate problem areas. It must be understood that the test equipment is not an exact science but rather tools used as indicators of possible problems. At times, because of hidden construction within the wall cavity, the meters get false readings or no readings at all. Some meters will pick up on metals, wiring, unique wall finishes, etc. Positive readings do not always mean there is a problem, nor do negative readings necessarily mean there is not a problem. We do not use the equipment to obtain exact moisture content, but rather to obtain relative readings which may warrant further investigation. This information is then used to help determine potential problem areas.