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Roof Inspections Services

Roof InspectionsProperty Managers too often assume that a roof is in good shape if it does not leak. This error in judgment may be costly because many roof problems are present long before water actually enters the building. It is unfortunate, but the out-of-sight, out-of-mind philosophy still plays a major role in roof maintenance.

It is quite common for an entire roof to be replaced because a leak could not be found, and conversely, areas are being fixed that are not the problem spots. Life expectancy failures of roofing materials can cost the building owner millions of dollars yearly. Roofing problems represent 30% of all court cases brought against architects, and VIS offers an effective solution.

A state-of-the-art infrared survey locates moisture in a roof and also provides an accurate map to replace the wet areas.

During daylight hours, a roof collects thermal energy from the sun. The roof surface receives this energy, which is then transferred into the roof structure. Dry insulation will resist the flow of heat and will store very little thermal energy. Where there is water in the roof structure and insulation, the area is more receptive to the flow of energy. When a thermal scan is done, the wet areas then emit more energy than the dry and an obvious image can be recorded to pinpoint the problem areas.

Although temperature differences between wet and dry insulation will occur during both day and night, daytime inspections are of little value since the intense thermal radiation will mask thermal differences. Therefore, roof surveys should be conducted at night after a hot, dry day (i.e., no surface water).

The frequency of roof surveys depends on age and condition, environmental influences, rooftop traffic, and size and accessibility.

Visual Inspection Systems, LLC has over 25 years of infrared inspection experience. A VIS roof survey includes comprehensive documentation consisting of a written report, photographs, thermographs, and notes on a roof plan that will indicate conditions found. This documentation will enable you to implement corrective activities quickly and precisely, and to develop a long-range preventative maintenance program.

Infrared inspections are a quick, inexpensive, and aggressive approach to eliminating your roofing problems.

Guidelines to help determine the best time to schedule your inspection:

  • Perform visual roof survey semi-annually — spring and fall. In spring, you observe any winter damage and can effect repairs in favorable weather. Fall surveys allow identification of problem areas — roof repair can occur before weather turns cold.
  • Perform warranty surveys before contractor’s or manufacturer’s warranty expires.
  • Perform quality-of-work verifications once repairs or new installations are completed.
  • Determine total areas of wet roofing in order to decide whether to replace entire roof or install patches.


The primary benefit of an infrared inspection program is longer roof service and fewer leaks. Secondary benefits include minimizing or reducing:

  • Costly emergency repairs
  • Product damage
  • Building and structural damage
  • Occupancy downtime
Infraspection Institute
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