Building envelope failures are among the most costly and complex leak scenarios in BC condominiums and strata properties. Wind-driven rain penetrating through cladding systems, window assemblies, balcony interfaces, and roof transitions can simultaneously affect multiple units while remaining extremely difficult to trace. CondoLeak.ca provides specialized building envelope leak detection and diagnostic testing for strata properties throughout British Columbia.
Common Envelope Leak Sources
Window and Door Perimeters
Failed sealant joints, improperly installed flashings, and inadequate drainage details around window and door openings allow water intrusion during wind-driven rain events common in coastal BC. Window perimeters are among the most frequent entry points in high-rise condominiums.
Cladding System Failures
Fiber cement panels, metal panels, stucco, and EIFS cladding systems can develop cracks, open joints, or failed weather-resistant barriers that permit moisture migration into wall assemblies, affecting multiple floors simultaneously.
Roof-to-Wall Transitions
Complex intersections where roofs meet exterior walls, parapet walls, and mechanical penthouses are vulnerable points requiring proper flashing and membrane integration. Failures here often cause damage across multiple units.
Balcony-to-Wall Interfaces
Where balcony membrane systems terminate against exterior walls or building columns, improper detailing creates pathways for water to penetrate the envelope independent of balcony membrane condition.
Penetrations and Mechanical Openings
Pipe penetrations, electrical conduits, hose bibs, and HVAC openings through exterior walls require proper flashing and sealant that deteriorates over time.
Our Envelope Testing Methods
Building envelope leak detection requires replicating real-world weather conditions while systematically isolating individual components to identify specific failure points. Our multi-stage approach includes:
AAMA 501.2 Spray Testing
Calibrated spray racks replicate AAMA 501.2 standard wind-driven rain conditions at window assemblies, cladding joints, and building transitions to identify precise water entry points.
Infrared Thermal Scanning
Following rainfall or spray testing, thermal cameras reveal moisture migration patterns within wall cavities, distinguishing active leaks from historical staining.
Systematic Isolation Testing
We test one component at a time — sealing windows, then testing cladding, then testing transitions — to definitively identify which element is failing rather than which wall area is wet.
Moisture Mapping
Grid-based moisture readings document the full extent of envelope-related water intrusion into interior assemblies, establishing remediation scope.
When to Request Envelope Leak Investigation
- Interior wall or window sill moisture only appearing during or after rainfall
- Leaks affecting multiple units on the same wall elevation
- Staining or efflorescence on exterior cladding surfaces
- Failed sealant joints visible around windows, doors, or cladding panels
- Planning envelope remediation and need scope documentation
- Post-construction deficiency investigation for new condominium buildings
- Insurance claims requiring origin determination for wind-driven rain damage
Envelope Leaks are Always Strata Responsibility
The building envelope — cladding, windows within the envelope system, roof, and waterproofing membranes — is common property in virtually all BC strata corporations. This means investigation and repair costs are the strata's responsibility, not individual unit owners. Our reports clearly document the envelope as the leak source, supporting strata insurance claims and preventing improper cost allocation to unit owners.