امنیت کاری در سقف شینگل
NON-DESTRUCTIVE EVALUATION (NDE)
After completion of all building construction, but before occupancy, consideration should be given to NDE of the roof to check for excessive moisture within the roof system. The purpose of the NDE is to find areas of wet insulation caused by moisture entrapment during application or leakage caused by roof system defects. Low voltage electronic leak detection may be employed continuously to monitor roofs to warn of leaks before they migrate to the building interior. This technique is usually employed on high-risk occupancies, such as hospital operating rooms, computer facilities, museums, etc. See the Integrity Testing for Roofing and Waterproofing Membranes Resource Page for further information.
At the pre-roofing conference the contractor should be notified if NDE is to be conducted. (Notification may result in greater diligence in application and care of the completed roof).
At the end of the project, the owner should be provided a file with the following items:
- Contract drawings and specifications related to the roof
- Approved submittals
- Minutes from the pre-roofing conferences
- Field observation reports
- Pertinent construction correspondence related to the roof
- Warranty (if specified)