Insurance Requirements for Preventative Moisture Management Assessments via Infrared Surveys
By the end of 2006, insurance companies will begin requiring homeowners and commercial buildings to begin moisture testing as a condition of insurability. Use Mayfield IR to avoid mold problems and claims by eliminating areas of leakage which can lead to spore growth.
FLOODS HURRICANES DISASTER RELIEF & INSURANCE CLAIMS
Moisture from disasters such as flooding, hurricanes, and even wind driven rain can remain long after the crisis has passed. Mayfield Thermography can quickly find the true extent of the damage so that insurance estimates and repairs can be more accurate the first time. For your loss prevention or disaster relief needs, particularly in the New Orleans Baton Rogue Louisiana Mississippi area due to Hurricane Katrina, please consider our IR scanning services.
Brochures in Adobe Acrobat PDF format
In a revolutionary application of thermography, Mayfield is able to detect moisture leaks in walls, ceilings and structural components with ease. Moisture detection is critical to avoid mold issues, insect intrusion and ultimately expensive repairs.
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, and 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.
Why Aerial Infrared
Performing infrared roof moisture surveys while standing on the roof is not the best method because imagery from a walk-on survey is not as useful as aerial imagery. The same laws of physics apply to both aerial IR and on-roof IR. A dry roof, low winds and no rain are needed on the night of the survey. However, the "window" when the roof is radiating heat differently from wet and dry areas is longer with aerial infrared because slight nuances of temperatures over large areas are recognizable. A high angle of view and high resolution are needed to produce usable imagery. We use large-format infrared cameras, which have at least 512 x 512 staring array detectors (262,144 pixels). From an altitude of 1,200 – 1,500 feet above the roof with over a quarter of a million pixels, the ground resolution element is about six inches square.
Fixed-wing aerial infrared imaging provides many advantages over on-roof infrared imaging:
As a result, the report is clear, concise and easy to understand.
Further processing can be done on roof areas of specific concern. The report components are as follows in order by cost:
The biggest advantage of aerial infrared is on roofs that are the most difficult to image from any distance or angle. Roofs that, for instance, have a lot of ballast, are covered with reflective coatings or for whatever reason are impossible to image from the roof. With high-resolution, plan view aerial imagery, slight nuances of temperature can be seen from far enough away to actually see the pattern of heat and make a determination of where the problems are.