Roof Moisture Survey

 
 
Gower Group - Roof Decscans
 

Electric Capacitance / Impedance

ASTM D7954 - Standard Practice for Moisture Surveying of Roofing and Waterproofing Systems Using Non-Destructive Electrical Impedance Scanners

Roof scans are a non-destructive testing technique used to quickly and accurately identify water entry pathways and areas of entrapped water within a roof assembly. The primary purpose of non-destructive testing is to identify and quantify areas of wet insulation within conventional low-slope roof systems. In many cases, non-destructive testing can provide a snapshot of the overall condition of the roof system beyond what can be seen on a visual basis.

It involves placing a moisture meter on the surface of the roof to send a safe electric current into the roof without penetrating the roof membrane. If the material is wet, the dielectric properties of the material would produce a higher meter reading than it would if the material were dry.

The primary purpose is to identify and quantify areas of wet insulation within conventional low-slope roof systems. In many cases, testing can provide a snapshot of the overall condition of the roof system beyond what can be seen on a visual basis.

Roof scan testing may be utilized as a maintenance tool for several reasons, such as, justification that the roof is in a failure mode and in need of replacement, identifying problem areas before they manifest themselves as interior leak conditions, and identifying areas of wet insulation for the purpose of energy savings due to lost R-value.

INFRARED

ASTM C1153 - Standard Practice for Location of Wet Insulation in Roofing Systems Using Infrared Imaging

Infrared testing can be performed in a variety of situations to detect problems before they become much larger issues. Infrared testing is used to detect water damage and leaks beneath the surface of the roof, allowing the opportunity to repair the section before it continues to spread. Infrared testing is used to detect heating and cooling loss or moisture problems due to insulation deficiencies or construction issues.

Moisture intrusion, resulting from poor roof installation to defective exterior finishes and HVAC systems, are one of the most common defects in the construction industry. With our construction knowledge base and extensive state of the art equipment, we can locate the source quickly, saving our clients time and money in the long run.