What Is the Best Time to Perform an Infrared Roof Scan?

While most roof systems can benefit from an infrared roof scan, there are some types of roof systems for which they are not recommended. In addition, there are some guidelines your roofing professional should follow when scheduling an infrared roof scan.

When Are Infrared Roof Scans Usually Performed?

Here are the times of year and weather conditions that are optimal for performing a thermographic roof scan:

  • Between April and November
  • At night, after a sunny day, where there is at least a 6-8 degree Celsius difference between the daytime high and temperatures shortly after sundown
  • When the roof surface is dry
  • On a compatible roof system (more on this below!)

When Do You Need an Infrared Roof Scan?

Here are a few reasons a thermal scan might be a good idea for your buildings:

  • Sustainable Facilities Management Practices: Maintenance and proactive problem solving are some of the most sustainable methodologies available to facilities managers. They keep your existing roof out of the landfill longer.
  • It’s Been a While Since You Had One Done: We generally recommend an IR scan every 1-3 years, depending on the interior purpose of the building, available maintenance budgets, and the individual owners themselves.
  • Quality Assurance on a Recently Installed Roof System: If you don’t trust the new roof you recently had installed, a thermographic scan can reveal problems quickly as long as the roof system is compatible with infrared technology. (See next section)

When You Don’t Need an Infrared Roof Scan

There are certain types of roof systems and components that are not compatible with thermographic technology:

  1. Inverted Roof Membrane Assemblies: are not compatible with infrared technology.
  2. Roofs with heavy ballast stone are very challenging to scan, often with inconclusive results.
  3. Certain types of insulation are not compatible with infrared scanning as they do not absorb and/or hold moisture. Your professional roof consultant can provide guidance.
  4. White or reflective membranes provide mixed results, depending on the membrane, insulation type and experience of the technician.

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