Moisture Mapping

 Purpose: Identify and map moisture within roof insulation and deck layers.
 How it works: Systematic grid or transect readings with calibrated moisture
    meters and probes; readings logged and visualized on a roof plan.
 Benefits: Quantifies wet area extent, helps prioritize replacement vs. repair,
    supports insurance claims.
 Deliverables: Moisture map, annotated photos, data table, recommended repair
   sequence.
 Preparation: Clear rooftop access, power or safe access path for crew.
Limitations: Probe readings require access points or core sampling for
   verification in some roof assemblies.
 

Infrared Scanning

Purpose: Detect thermal anomalies caused by moisture retention or roof failures.
How it works: Thermal camera survey during optimal thermal gradient windows,
   followed by ground-truthing with moisture meters.
Benefits: Fast coverage of large areas, non-contact identification of suspect
   zones, effective for evening/morning surveys when temperature contrast is highest.
Deliverables: Thermal map with hot/cold imagery, identified targets with
   confidence levels, next-step recommendations.
Preparation: Best performed during recommended temperature differentials;
   unobstructed line of sight to roof areas.
Limitations: False positives from wet ballast, shading, or thermal bridging;
   requires verification.
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Electronic Field Vector Mapping EFVM

Purpose: Pinpoint the actual entry point of water on electrically conductive roof assemblies.
How it works: EFVM applies a low-voltage electric field across the roof surface
   while measuring current flow to locate pathways where water penetrates.
Benefits: Identifies precise leak entry points without destructive exploratory cuts;
   highly effective on metal and conductive roofs.
Deliverables: Pinpoint locations on roof plan, voltage/current traces as evidence,
   recommended repair locations.
Preparation: Roof must be conductive or have a conductive layer; safety
   controls implemented for live-field work.
Limitations: Not suitable for non-conductive single-ply membranes without a
   conductive layer.
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Low Voltage Roof Scanning
Purpose: Non-destructive scan to detect moisture in membranes and insulation
   with minimal roof disturbance.
How it works: A low-voltage electric field and sensitive detection equipment are
   used to measure moisture-related conductance differences across a roof surface.
Benefits: Safe for most membrane roofs, minimal wear, quick deployment, and
   suitable for routine condition assessments.
Deliverables: Condition map, prioritized targets, photographic evidence, and
   recommended next steps. 
Preparation: Clear roof surface; coordination if rooftop equipment must be moved.
Limitations: Reduced effectiveness on very thin or non-conductive systems.
 

High Voltage Roof Scanning

Purpose: Deep-penetration moisture detection for thick, multi-layer roofs or
   heavily insulated systems.
How it works: Controlled higher-voltage scanning increases sensitivity and
   depth of detection compared with low-voltage methods; always performed with
   strict safety protocols.
Benefits: Finds hidden saturated zones that low-voltage methods can miss;
   useful for older or complex roof builds.
Deliverables: High-resolution condition maps, failure probability ratings,
   recommended invasive or repair actions.
Preparation: Safety setups, exclusion zones, and coordination with building  operations.
Limitations: Requires specialized equipment and certified operators; more
   planning for safety and access.
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