To get a reliable solution to a roof problem, a building owner needs a fair and thorough assessment of the existing roof system. A complete evaluation requires on-site observation and sampling activities. Roof repair or replacement can have several pitfalls, including:

  • Construction drawings or documents may not always show what was actually built.
  • More than one roof system may exist on a building, i.e. one roof system installed over another.
  • Roof deficiencies or damage are not always visible, and may require surveying, or sampling, such as:
  • Test cuts/material sampling
  • Physical and or quantitative analysis
  • Nondestructive moisture surveys
    • Infrared thermography
    • Electrical capacitance

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