British Columbia's strata corporations carry legal responsibility for the maintenance and repair of common property — including the building envelope. In a wet climate where envelope failures can cost millions in repairs, a professional envelope inspection is one of the most important investments a strata council can make.
What Is the Building Envelope?
The building envelope is the physical barrier between the interior of a building and the outdoor environment. It includes:
- Exterior cladding (stucco, fibre cement, wood, metal panel, EIFS)
- Windows and doors and their perimeter flashings
- Roof and roof-to-wall transitions
- Balconies and decks and their waterproof membranes
- Foundation and below-grade waterproofing
When any element of the envelope fails, water enters. In BC's wood-frame construction, that water reaches structural framing quickly.
Strata Legal Obligations
Under BC's Strata Property Act, strata corporations must:
- Repair and maintain common property, including the building envelope
- Commission a Depreciation Report every three years (for stratas of 5 or more lots)
- Maintain an adequate contingency reserve fund for capital repairs
Depreciation reports must include the physical state of all common property, including the envelope. An engineer preparing a depreciation report relies on current moisture data — not visual inspection alone — to assess remaining service life and cost replacement reserves accurately.
What a Professional Envelope Inspection Covers
A comprehensive building envelope and moisture inspection for a strata includes:
- Exterior visual survey of all facades, looking for caulking failures, cracked panels, compromised flashings and improper drainage
- Infrared thermal imaging of interior walls and ceilings to detect moisture behind finished surfaces
- Probe moisture testing behind cladding at strategic locations to measure actual moisture content in the wall assembly
- Controlled water testing at suspect window perimeters, deck-to-wall transitions and parapet details
- Balcony and deck assessment with electronic and thermal detection of membrane failures
Report Format for Depreciation Reports and Insurance
Our envelope inspection report is structured to serve multiple purposes:
- Depreciation report — the engineer receives an elevation-by-elevation moisture condition map with probe readings, thermal imagery and identified defects, with severity ratings to support remaining-service-life assessments
- Insurance claims — date-stamped photos of identified water entry points, thermal evidence of moisture extent, and a written narrative suitable for the insurer's adjuster
- Council and owners — a plain-language summary of findings and recommended action priorities, suitable for presenting at an AGM
- Remediation contractors — a detailed defect register with location, severity and repair specifications to support tendering
When to Schedule an Envelope Inspection
Key trigger events for strata envelope inspections:
- Three years before a planned depreciation report update
- Before the building's cladding, window or roof warranty expires
- Following a significant weather event (hail, windstorm, heavy rain)
- When multiple owners report interior moisture or staining
- Before setting or revising the annual maintenance levy
- Before any planned re-cladding or envelope repair project
We Serve BC Strata Corporations Province-Wide
LeakInspections.ca is a division of Anyleak.ca, serving BC strata corporations across Metro Vancouver, the Fraser Valley, Vancouver Island, the Okanagan and beyond since 1999. Our reports are produced to professional standards suitable for engineers, insurers and legal records. Contact us at 604-239-9934 to discuss your building's inspection requirements.