How can we help Roof Professionals?

As roof owners delay purchasing a new roof due to tough economic times, you can assist them by using infrared thermography to locate subsurface moisture in roofing materials. As part of your professional assessment, a well-prepared roof moisture survey will help you make surgical repairs and position yourself when they are ready to spend some money on their roofs.
We would like to be your resource for IR thermography with two excellent infrared survey service products and several others.

On-Roof Infrared Surveys

A network of Certified, well-trained thermographers is at your service. We can get on-roof IR surveys done anywhere in North America.

Surgical Aerial IR Roof Surveys

We can fly the specific roofs that you have contracted to analyze and make high resolution photographs, high resolution thermographs and CAD drawings of the wet areas.

Target Marketing

By flying over wide areas with high concentrations of roofs, we help you find potential customers so that you can target marketing efforts.

New and Used IR Imager Sales

We have an on-line store for infrared contractors, which you can buy or rent imagers from and get training at discounted prices.

Consulting and Research

We can perform testing and consulting on your roof products in a lab or on a test roof.


Greg Stockton
Stockton Infrared Thermographic Services, Inc.
8472 Adams Farm Road
Randleman, NC 27317-7331
(800) 248-SCAN (toll-free)
(336) 498-GREG (voice)
(336) 689-3658 (cell)

Roof Maintenance in General

Waterproofing problems manifest themselves in two ways: Leakage and entrained moisture contamination. Leakage is pretty simple, although the leak inside the building rarely directly relates to the exact spot on the roof, since the water flows down the slope of the roof to a spot that is not sealed and into the building at that point. Most leaks occur where the waterproofing is sealed or where there is a penetration of the roof. Since most types of roof systems absorb some amount of water, it is harder to find the exact spot of water contamination in the insulation because it may not leak into the building until it has absorbed all the water it can hold.
There are three types of surveys that are used to find water in a roof:
  • Nuclear gauges - which count neutrons
  • Capacitance meters - which measure resistance
  • Infrared - which measures heat.
Both nuclear gauges and capacitance meters are used to take spot readings on a 5’ X 5’, 10' X 10' or 20' X 20' grid on the roof. These measurements are used to extrapolate where the water is from the readings obtained from the gauges. These surveys are very labor-intensive and therefore expensive. They are good for types of roofs that do not gain or lose much solar energy and therefore do not lend themselves to infrared.

Roof Infrared Basics

During the day, the sun radiates energy onto the roof and into the roof substrate, and then at night, the roof radiates the heat back into outer space. This is called radiational cooling. Areas of the roof that are of a higher mass (wet) retain this heat longer than that of the lower mass (dry) areas. Infrared imagers can detect this heat and "see" the warmer, higher mass areas, during the "window" of uneven heat dissipation.

Understanding Infrared Roof Imagery

Infrared imagery is often a grayscale picture whose scales (or shades of gray) represent the differences in temperature and emissivity of objects in the image. As a general rule, objects in the image that are lighter in color are warmer and darker objects are cooler. No object in the images is detected via visible light wavelengths (400-700 nanometers) rather, only from infrared wavelengths in the 3000-5000 nanometers or in the 3-5 micrometers (microns) range. Lights and other relatively hot objects are very evident, but as a result of their heat, and not light emissions.
When an image is taken by our infrared camera, it is often recorded on videotape and/or digitally saved to a hard drive and later converted to a digital image file with the help of a computer. The image may then be modified in a number of ways to enhance its value to the end user. The highest resolution infrared images are usually found on the digital media, while the printed pictures may be used as a convenient reference when making the building drawings or accompanying a roof report.
Areas of roof moisture contamination often manifest themselves as warmer (lighter colored) areas that may be nebulous in shape and sometimes mottled in appearance, although they are commonly found in linear or puddle-like shapes. The linear shapes many times follow low areas, drainage routes, roof edges and seams. Puddle-like round or oblong shapes often form around roof penetrations such as mechanical equipment, standpipes, vents and drains. The wet areas are lighter in color because the latent heat (from daylight sunshine) in the trapped water mass is greater than in the dry, functioning insulation or roof substrate. After sunset when the roof structure cools down, wet areas of roof insulation and other materials continue to radiate heat, allowing our sensitive infrared cameras to detect the sources of heat and record them for later analysis.

On-Roof Infrared

We create detailed, high-quality and easy to understand reports documenting roof moisture. Roof professionals can then use the information to verify the wet areas and write specifications to repair the roof.

Aerial Roof Infrared

We create detailed, high-quality and easy to understand reports documenting roof moisture. Roof professionals can then use the information to verify the wet areas and write specifications to repair the roof.

Imagery Examples

The aerial infrared division of Stockton Infrared Thermographic Services, Inc. (AITscan) has performed qualitative infrared thermographic surveys of roof moisture on thousands of buildings. We brought together all the components that truly make us the state-of-the-art in the field of infrared thermography. Our deliverable product is the best on the market today. We use high-resolution infrared imagers, digital recording equipment, techniques that have been refined over the years and the attitude that we are going to obtain the best imagery possible and produce a professional report in a timely manner.
CAD Drawing
Why cover a wet roof?

Roof Asset Management

Example of mosaic visible image of a low-sloped roof (click to magnify)
Example of mosaic thermal image of a low-sloped roof (click to magnify)
Example of mosaic visible image of a low-sloped roof with CAD drawing overlay
Example of mosaic thermal image of a low-sloped roof with CAD drawing overlay

Clients whose name you will recognize

Abbott Laboratories
Bank of America
BE Aerospace
Bechtel Nevada
Becton Dickenson
BFI Waste Systems
Black & Decker
Borden Chemical
Brown & Williams Tobacco
Brown University
Burlington Industries
Busch Entertainment
CB Richard Ellis
CIBA Specialty Chemicals
Cisco Systems
Continental General Tire
Defense Information Agency
Defense Logistics Agency
Duke University
ER Squibb & Sons
EMC Corporation
Eveready Battery Company
Fleischmann's Yeast
Ford Motor Company
GAF Materials
Gates Rubber Company
Goodyear Tire Company
Hatteras Yachts
Hilton Hotels
Hoechst Celanese Corporation
Hospital Corporation of America
International Paper
Johnson Controls, Inc.
Kelly-Springfield Tire Company
Kimco Realty
K-mart Corporation
Konica Manufacturing, USA
Liebert Global Systems
Litton Poly-Scientific
Lockheed Martin
Lowes Corporation
Lucent Technologies
MCI WorldCom
Michelin Aircraft Tires
Mount Olive Pickle Company
National Institute of Stdr & Tech. Nortel Networks
Oxford Press
Parker Hannifin Powertrain
Perdue Farms
PYA Monarch
Quad Graphics
Sara Lee Corporation
SC Johnson
Sheraton Hotels
Smithfield Foods
Soil and Materials Engineers
Sumitomo Electric Lightwave
The Coca-Cola Company
Townsend Foods
Trammel Crow Company
Trizec Properties
Tyson Foods
United States Postal Service
US Army
US Army Corp of Engineers
US Foods
US Navy
Wachovia Bank
Wal-Mart Stores
Tremco Waterproofing Technologies
Wyeth-Lederle Vaccines
ZF Meritor LLC

Legal Notice:

All materials contained herein are trademarked and copyrighted (1988-2010). All data, images or any other documentation is the exclusive property of Stockton Infrared Thermographic Services, Inc. (SITS). The name “Stockton Infrared Thermographic Services, Inc. ,” “SITS,” and other trade names, trademarks, service marks, logos and other commercial symbols (collectively the “Marks”) are hereby protected. All content, images, systems, formats, designs, methods, specifications, standards, procedures, software or other technology, whether patented, licensed, or designated by SITS, are and shall be the sole property of SITS. User shall have no right to use any of the Marks without the express written consent of SITS.