Case 6
- Introduction
- Causes of Defects
- Good Practices
- Standards
- Maintenance and Diagnostics
- Remedial
- Similar Cases
- References
Maintenance and Diagnostics
Regular inspections should be carried out methodically at regular intervals to detect for any defects
Instruments can be used extensively to diagnose the defects and to take the action to keep the structure in good condition.
The following electronic instruments and techniques can be used to diagnose leakages on roof.
Diagnostics of Defects
Leak Detection
Fluorescent dyes – The use of fluorescent dyes assist in tracing water pathways. The fluorescent dyes contrast the dour color of the concrete roof structure and leaves a stained impression of the water pathways that the leaks travel through. Effort then can be redirected to resolve the problem that caused the leak.
Thermography
Thermography analyses the surface temperature distribution to access the behavior of the structure beneath the surface.
Objects radiate particulate intensities of thermal energy, thus thermal variances of any contact which deviates from the norm can be revealed.
Moisture Meter
Detects moisture beneath the surface being tested by measuring the resistance between two low frequency signals transmitted from conductive pads on the base of the instrument.
The moisture meter is also used to define the levels of moisture concentration on the roofs. From the readings, the user can quantify the moisture as damp, wet or saturated.