Leakage risk on facades
Exterior facades face constant exposure to rain, wind, and temperature shifts that test seals over time. Cracks, poor joints, and failed flashing are common entry points for water. Early signs include damp patches, staining, and peeling coatings that demand attention.
To assess risk accurately, perform a visual audit complemented by a leak test on critical joints. Modern methods such as water spray tests simulate heavy rain to reveal hidden paths for moisture. If tests show leakage, map the pathways to plan targeted repairs.
Proper sealant selection
Choosing the right sealant starts with substrate compatibility and expected movement of the wall. Silicone, polyurethane, and polysulfide each suit different conditions and weather exposure. Consider UV resistance, weather aging, and color stability when selecting products.
Evaluate sealant properties such as elongation, adhesion, and cure time, and verify long-term performance with field tests. Prepare the substrate with cleaning, priming, and joint shaping to ensure reliable bonding. Use field tests and, when needed, an ultrasonic thickness gauge to verify substrate integrity beneath the coating. Select exterior-grade sealants with proven UV resistance and compatible backing for lasting performance.
Trench work guidelines
Trench work at exterior walls enables secure waterproofing at joints, window perimeters, and balcony interfaces. Plan trench depth, width, and slope to accommodate membranes, drainage layers, and backfill without creating new leak paths. Coordinate with scaffolding and safety protocols to protect workers during excavation near facades.
Install a rain-screen compatible membrane system, drainage board, and proper flashing to guide water away from the structure. Ensure joints with terraces and parapets receive continuous sealing and mechanical protection against movement. Use trench reinforcements and backfilling that match substrate moisture and freezing conditions to avoid gaps in the waterproof layer.