INTERNAL ROOF SYSTEM MOISTURE INVESTIGATION:
Internal roof leaks are one of the building owners most persistent and costly problems. These leaks can cause the loss of insulating properties, structural deterioration and property damage costing building owners millions of dollars every year. This often results in complete removal and replacement of all the existing roofing materials; as in many situations these replacements are premature to the potential service life of the installed roofing systems, checking for roof leaks in to the underlying roof system and insulation is as important as internal building leaks.
Roof-Spec can / will perform this “WET” investigation through one of three increasingly accurate procedures…
As part of any initial visual roof inspection, Roof-Spec will carry out a roof surface pressure test. This is normally done through walking the roof area while testing the roof surface for soft, spongy / collapsed area of the roof. Most times this underlying surface anomaly; “WET” is visually recognized by the lower lying ponded area of the roof surface; however, this does not always require the presence of surface water; as the roof surface coloring of the graveled surface or the exposed roof membrane will always provide the knowledgeable inspector indication of suspect insulation deterioration.
Roof-Spec utilizes industry specific moisture survey equipment and moisture testing equipment. One of these tools is the Tramex moisture survey scanner. This is a tool that can be used at any temperature as long as the roof surface is dry giving the consultant added value to a typical infra-red survey used by many in the industry.
Roof-Spec also utilizes thermal imaging cameras to perform requested infrared roof moisture surveys. With these tools, we are able to “see” where the moisture is trapped within the roof system. This procedure is performed at sundown to allow thermal differences or “anomalies” to occur once the air and roof surface temperatures reach a state of equilibrium. During the day, moisture within the roof insulation is heated and then it retains that heat into the night longer than the dry insulation. This results in thermal anomalies that can be detected by the infrared camera. These anomalies are then considered as suspect wet areas and are outlined on the roof surface with spray paint. Roof cores can then be taken in both the dry and the suspect wet areas to verify the instrument readings. An infrared moisture survey can determine if and where detrimental moisture is in a roofing system. By making this type of determination, a building owner has more options with regard to the corrective action. One of these surveys can save an owner significant costs by allowing him to replace only the damaged areas of roofing rather than the entire system. Moisture surveys can also determine if a new roof installation has been installed without moisture compromise.
The absolute proof of any “WET” or “DECAYED” underlying insulation in a roof system is only found when an actual roof system “CORE CUT” test is completed; Roof-Spec will always cut a core to validate any suspicions.HOWEVER…Intrusive core cuts are not always required during a initial roof inspection. Therefore, Roof-Spec will only cut a system core test if it suspects that the visual inspection alone is not sufficient to collect the relevant information for the completion of a comprehensive and informative inspection report.
MOISTURE TESTING… As part of any intrusive roof system core cut testing. Roof-Spec will always complete its moisture testing of the underlying roof system; including the primary integral roofing insulation; any secondary insulation sheathing; and the underlying vapor barrier, through to the actual structural roof decking substrate. This information will then be reported to the property manager; or, building owner within the inspection report.