
British Columbia, Canada

Lower Mainland

Business Days 8 AM – 5 PM

Advanced Waterproofing Solutions for Building Envelope Protection in British Columbia
Northstrata Construction is an approved applicator of the SOPREMA ALSAN RS Detail liquid applied waterproofing system
The building envelope is all the outer elements of a building that separate the interior environment from the outdoors: walls, roofs, decks & balconies, windows, doors, flashing, membranes, etc. When these elements are compromised, water, moisture, heat/cold, and pests can intrude. In BC’s rainy, wet climate (especially the Lower Mainland, Vancouver Island etc.), a leaky or failing envelope is a major source of damage — structural rot, mould, elevated maintenance costs, reduced building lifespan.
For strata corporations, maintaining a healthy building envelope is critical not just to avoid costly repairs, but also to protect property values, minimize special levies, ensure occupant safety and comfort, and meet regulatory / warranty requirements.
Below are aspects of restoration / waterproofing / vinyl decking relevant to strata buildings. We tailor solutions to strata-specific challenges like shared common property, and limited common property:
| Service | What It Covers | Why It’s Important for Strata |
|---|---|---|
| Condition Assessments & Envelope Surveys | Full inspection of decks, balconies, membranes, flashing, thresholds, transitions (where deck meets wall or door), drainage, slope, structural integrity. | Early detection of leaks or risk zones; helps plan budgets, avoid surprises. |
| Waterproofing Membrane Installation or Replacement | High‑quality membranes (vinyl, urethane, etc.), proper detailing at joints, thresholds, rails; ensuring slope and surface prep. | Prevents water ingress; extends service life of decks/balconies; reduces rot and interior damage. |
| Vinyl Decking Systems | Vinyl membranes over plywood or concrete decks, custom fitting around thresholds, transitions; integrating with flashing and doors. | Vinyl decking provides durable, low‑maintenance walking surface + waterproofing. Less ongoing repair and lower liability risk (slippery surfaces, leaks). |
| Flashing, Sealants, Thresholds & Joints Repair | Ensuring waterproof transitions, replacing failing sealers, ensuring sound flashing. | These are frequent sources of leaks; more so at door thresholds and where deck meets wall. |
| Rot Repair & Structural Repairs | Addressing wood rot, moisture damage in substructure (joists, beams); sometimes replacing or reinforcing structural members. | If neglected, damage can spread, affecting safety and requiring more expensive work. |
| Surface Finishes, Drainage, Slip Resistance | Ensuring proper slope for water runoff; slip‑resistant finishes; drainage paths; maintenance access. | Essential for safety, longevity, and compliance with codes or liability standards. |
| Regulatory Compliance & Warranty Insurance | Working with BC Building Envelope Renovation Regulations; ensuring licensed renovator, obtaining requisite insurance; following BC Housing / Homeowner Protection Act rules. BC Housing+2BC Housing+2 | Failure to comply can lead to permit issues, uncovered repairs, or insurance / warranty problems. |
Rain & Moisture Loads: BC’s climate means high rainfall, which can exploit any weak point (poor flashing, membrane aging, incorrect slope or drainage).
Aging Membranes & Materials: Over time waterproof membranes degrade; vinyl decks suffer wear; sealants fail; wood rot begins.
Improper Installation / Detailing: Even good materials fail if thresholds, transitions, corners, flashings aren’t done correctly.
Deferred Maintenance: Small leaks or gaps are often ignored until damage is visible—by then issues are larger and more costly.
Regulatory & Warranty Obligations: The Building Envelope Renovation Regulation (BC), licensing (e.g. BC Housing), required warranties (2 years labour / materials, longer for water‑penetration) must be observed. BC Housing+2BC Housing+2
Shared Ownership Complexity: In strata, parts of the building (common property vs limited common property) affect who is responsible, what approvals are needed, etc. Coordination matters (council votes, strata bylaws, budget).
To ensure compliance and protect your strata:
Contractors doing major building envelope work must be licensed under BC Housing’s Building Envelope Renovation Regulation. BC Housing+1
Warranty insurance is required: covering labour & materials (minimum period), and building envelope water penetration. BC Housing+1
A Building Envelope Renovation Schedule must be submitted when required, naming the building envelope consultant etc. BC Housing
Make sure bylaws and strata minutes clearly define responsibilities (who is responsible for what; what is common property vs limited common property).
Refer to depreciation reports / building condition assessments to understand lifecycle of envelope components (e.g. membranes, vinyl decking, sealants).
Initial Assessment
Visual inspection
Moisture testing, infrared or non‑destructive testing if needed
Engineering review if structural concerns
Scope Development
Determine what needs repair vs replacement
Prioritize by risk & cost
Prepare cost estimates & timelines
Approval & Permitting
Strata council / AGM approvals (if levy required)
Ensure contractor licensing and confirm warranty insurance
Obtain building permits if required
Restoration / Construction Work
Remove failed membrane / deteriorated decking as needed
Repair any structural damage or rot
Install new waterproofing membrane / vinyl decking system with correct detailing
Flashing, thresholds, sealants, and drainage
Final Inspection & Testing
Water tightness / leak test (if possible)
Verify slope, drainage, transitions
Surface finishes, safety features
Maintenance Plan
Regular inspections, cleaning of drains and gutters
Periodic resealing of thresholds and joints
Monitoring for wear, leaks or damage
Reduced risk of water damage, mould, rot, and consequent health hazards
Lower ongoing maintenance costs; fewer emergency repairs
Better appearance, higher property values
Improved safety (slip resistance, structural integrity)
Compliance with regulations, lower risk of penalties or denied warranty claims
Predictability in budgeting (with appropriate reserve planning)
In a BC Housing property, six vinyl‑membrane decks were restored. The existing vinyl and plywood were removed, structure inspected (including slope and rot), new plywood applied, vinyl membrane installed, flashing and resin work done around thresholds, and railings replaced. Project coordinated among strata, engineer, and contractor; residents were informed and minimal disruption was achieved.
(Based on project types seen in Vancouver / Lower Mainland) CITYWIDE BUILDING ENVELOPE+1
How often should vinyl decking / membrane decks be inspected or replaced?
With proper installation & maintenance, membranes and vinyl decks can last many years. However, the service life depends heavily on exposure, usage, slope, drainage, and upkeep. Poor detailing or water ponding drastically reduces lifespan.
If I see a leak under my deck or at a threshold, what should I do?
Report to the strata council or property manager immediately. Document the damage (photos). An assessment should be done early to limit scope. Waiting tends to increase cost exponentially.
Who pays what in strata for these kinds of repairs?
It depends on what the bylaws say, whether the deck or membrane is common property or limited common property, and whether the damage affects multiple units. In many cases the strata corporation is responsible for building envelope components. Always check your strata documents & legal obligations.
If you are a strata council or manager considering restoration, we can help you:
Arrange a comprehensive building envelope assessment
Prepare a restoration plan and budget
Handle all the permitting, contractor coordination, and warranty documentation
Provide consultation on vinyl decking options, membrane types, and long‑term maintenance strategies
Get in touch today for a free consultation / quote. Let’s protect your building, your investment, and the well‑being of all your residents
