STP1107

    Tracing Roof and Wall Leaks Using Alternating Electric Fields and Vapor Detection

    Published: Jan 1991


      Format Pages Price  
    PDF (108K) 5 $25   ADD TO CART
    Complete Source PDF (6.2M) 5 $75   ADD TO CART


    Abstract

    Exterior water can penetrate a building and move in either continuous or discontinuous flow. In the case of continuous flow, from point of entry to point of observation, surfaces of construction materials are wetted and may provide a path of adequate conductivity to produce a detectable alternating electric field when a voltage is applied. Where this is the case, a suitable a-c ource and detector can be used to determine the source of water entry.

    For cases where water flow is discontinuous, detection of vapor from water mixed with organic solvent can assist in tracing water movement and source of origin. Commercial equipment is available to measure, non-destructively, moisture behind and within non-conducting substrates such as wood and exterior foam panels. Using these methods one can often unambiguously locate the source of a water leak.

    Keywords:

    moisture detection, leak detection, alternating electric field, organic vapor


    Author Information:

    May, JC
    building consultantarchitect, J. May Home Inspections/JMHI, Inc.M.B. Associates, CambridgeBoston, MAMA

    Vassiliades, JM
    building consultantarchitect, J. May Home Inspections/JMHI, Inc.M.B. Associates, CambridgeBoston, MAMA


    Paper ID: STP17702S

    Committee/Subcommittee: E06.55

    DOI: 10.1520/STP17702S


    CrossRef ASTM International is a member of CrossRef.