Rainscreen & Drainage Layer Inspection Across BC
Verify that your rainscreen gap and drainage mat are actually working
About This Service
Modern BC building code requires a drainage plane behind cladding — either an airspace or a drainage mat — to drain any water that gets through the surface. When this system is improperly installed, blocked or absent, the cladding fails like the older one-coat stucco it was meant to replace. We inspect drainage plane performance through probe testing, moisture mapping and targeted controlled water tests to verify the system is functioning as designed.
Why This Inspection Matters
Our Inspection Process
- 1
We review available building plans and note the cladding system type.
- 2
Probe testing at strategic locations confirms whether moisture is present behind the cladding.
- 3
Controlled water testing verifies whether water introduced at a surface defect drains out or tracks in.
- 4
Thermal imaging maps moisture-affected wall sections.
- 5
We produce a system-performance assessment identifying installation deficiencies and their locations.
What You Receive
- Rainscreen system performance assessment
- Probe moisture readings at selected locations
- Thermal mapping of moisture-affected sections
- Identified installation deficiencies and locations
- Recommendations for targeted repairs or full system remediation
Rainscreen & Drainage Layer Inspection — BC Locations
Available for buildings across all of British Columbia.
Envelope Inspection by BC City
Frequently asked questions
What is a rainscreen system?
A rainscreen uses a drainage gap or drainage mat behind the cladding to shed any water that gets through the surface, keeping the structural wall dry. It is BC's standard for most cladding systems.
How do I know if my rainscreen is working?
Probe moisture testing behind the cladding is the definitive test. If moisture levels are elevated at random locations not near obvious entry points, the drainage layer is not performing.
Can you inspect under existing cladding?
Not visually — but probe testing and thermal imaging give us a clear picture of moisture presence and extent without removing cladding.
Book a Rainscreen & Drainage Layer Inspection
BC envelope inspection by Anyleak.ca — the specialist leak detection network serving British Columbia since 1999.