The aging of materials and the lack of maintenance, often at the same time as failures in the design and execution of the roofs, give rise to anomalies. The success of a roof rehabilitation involves improving (or at least restoring) its original condition, ensuring its correct functioning.
- Knowledge of the coverage system;
- Thermal balance;
- Climatology and surroundings;
- Incompatibility between materials;
- Increase of quotas;