Case 2
- Introduction
- Causes of Defects
- Good Practices
- Standards
- Maintenance and Diagnostics
- Remedial
- Similar Cases
- References
Maintenance and Diagnostics
When small blisters or buckles are exposed, but the surface of the blister has not deteriorated or ruptured, sweep dust, dirt and aggregates from the exposed surface areas. Take care not to rupture the blister. Apply a thin coat of asphalt primer to the existing asphalt roof surfaces, and allow the primer to dry. (Coal-tar roofs generally do not require priming).
The primer helps the bond between the new asphalt and the old roof. Coat the bare areas with either hot asphalt or hot coal tar as appropriate. Re-embed the aggregate surfacing into the hot coating as required. Do not apply hot bitumen directly over loose aggregate surfacing as the bitumen will not adhere the loose aggregate. Mark the area for future assessment.
Diagnostics of Defect
Moisture Meter Probes
To determine underlying suspect moisture. Moisture meter probes utilizing non-destructive technology. This meter is the ultimate investigative tool for detecting water on or beneath wood; roofing; plaster and brick; even below the waterproof covering of a felt roof.
No more unnecessary holes made by metal probes. Electric signals are transmitted to the surface from two scratch-proof, rubber electrodes which target the exact location of a leak. Three separate scales assure accurate readings for each surface material. Simply select a scale, hold the Moisture Encounter to the surface, and read directly from the meter.