These are primarily nondestructive methods of locating moisture-contaminated components, including infrared thermography, nuclear moisture surveying and electrical impedance scanning. Using these methods, in combination with core test sampling to verify wet areas, roof repairs can often be minimized and limited to only those that have been affected by moisture ingression. Based on the information provided by the inspections, task reports, which identify the preventive or corrective actions to be undertaken and their associated costs, are developed. The actions required and the proposed procedures are determined by the configuration and composition of the roof assembly surveyed. Once the actions have been undertaken, the records are updated and the cycle begins anew.
Roofs are subject to the stresses and deteriorating effects of their usage.
The rate of deterioration can be slowed through the implementation of a well-designed roof maintenance program. Through implementing preventive actions in a timely manner, a roof s performance can be maximized and its useful service life extended. Financial analysis should be viewed as a useful tool to assist the decision-maker in selecting among various expenditure alternatives and as a means of measuring costs and benefits in monetary terms. The basis of decisions, however, must always rely on the knowledge and skill of the individuals conducting the evaluation. For such analysis to have any merit, a thorough understanding of roof construction and engineering principles is crucial.