During sealant restoration, defining the full scope of work at the outset is essential. Accurate inspection and documentation of existing conditions help identify the extent of deterioration, its causes, and appropriate remediation methods—reducing the risk of unexpected costs or incomplete repairs. On large buildings with extensive joint networks, a structured approach to documentation ensures informed decision-making and consistent outcomes.
Impact of Sealant Joints
Joint sealants are critical to the performance of the building envelope but do not last indefinitely. UV exposure, temperature fluctuations, rainfall, humidity and building movement all contribute to sealant ageing and failure. Once sealants crack or lose adhesion, moisture can enter wall assemblies, leading to leaks and secondary damage.
In South Africa’s varied climates—ranging from high UV exposure inland to wind-driven rain and coastal moisture—regular inspection of sealant joints is a key preventative maintenance measure. Early identification of localised failures helps extend the service life of both the sealants and surrounding building components.
Inspection and Documentation
Regardless of why restoration is being considered, existing joint conditions should always be recorded. A systematic survey provides the data needed to determine repair strategies and material suitability. Inspections should not rely solely on ground-level observation. Depending on building height and complexity, access equipment such as swing stages or mobile platforms may be required.
Visual inspection alone may not reveal all failures. Probing sealant joints at regular intervals can help identify hidden adhesion loss. Findings should be recorded consistently across the building.
Documentation should include:
- Existing sealant type, where known
- Substrate materials and joint dimensions
- Condition of sealants and adjacent substrates
- Approximate quantities and locations of failed joints
This information forms the basis for accurate planning and reduces uncertainty during execution.
Analysis of Findings
Once documented, inspection data should be reviewed to determine whether failures are isolated or widespread. This helps confirm whether further investigation is required and supports informed decision-making. Understanding the root cause of failure is critical. In many cases, sealant problems are linked to ageing, poor surface preparation, contamination, incorrect joint design, or installation errors. Where failures are caused by related building elements, such as windows or flashings, resealing alone may not resolve the issue.
Selecting a Restoration Approach
Based on the findings, one of three approaches is typically appropriate:
- No action: Where sealants are not the source of the identified issue
- Spot repairs: Targeted replacement of failed joints where most sealants remain serviceable
- Full restoration: Replacement of all joints when sealants are nearing the end of their service life
Comprehensive documentation supports the correct choice and helps avoid repeated mobilisation or reactive maintenance.
Applicator Documentation
Documentation should continue during installation. Maintaining a daily site log helps track progress and quality. Records should include:
- Weather conditions
- Areas completed
- Installation crews
- Sealant and primer batch references
- Unusual site conditions or corrective actions
- Quality checks of completed work
These records provide traceability, support warranties, and assist with future maintenance planning.
Applicator Documentation
Thorough documentation before, during and after sealant restoration reduces risk, supports quality assurance, and protects long-term building performance. In South African conditions, where environmental exposure can be severe, structured documentation is a practical tool for ensuring durable outcomes.
Tremco South Africa applies this methodical approach to building envelope restoration, supporting professionals with clear assessments, informed planning and reliable execution.
