Case 3
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- Introduction
- Causes of Defects
- Good Practices
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- Maintenance and Diagnostics
- Remedial
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Cause of Defects
In this case, water ponding takes place at the location where the roof gradient is insufficient. Rainwater will only flow to the lowest end of the gradient and if there is no outlet to drain them away, they will be accumulated there.
The roofing contractor realized that there is a poor workmanship at the roof drop area. The membrane started to lose its adhesiveness and causes membrane to buckle. This affects the roof gradient and causes water to retain.