Maintenance guide
When should an asphalt membrane be repaired or replaced?
Factors to assess before choosing localized repair or full waterproofing-system renewal.
Updated: 6 August 2026Factors to assess before choosing localized repair or full waterproofing-system renewal. This information is general guidance and does not replace a technical property inspection.
Extent of deterioration
Isolated damage may allow repair; widespread deterioration requires broader assessment.
Adhesion and surface condition
Detachment, blisters and loss of continuity affect system reliability.
Previous repairs
Multiple patches can indicate that the problem is no longer localized.
Age is not the only criterion
Exposure, installation, drainage and maintenance matter as much as service time.