Roof Waterproofing Across Lower Mainland BC
- $0 Down Financing | Advanced Waterproofing Systems
Why Choose Great West for Your Roof Waterproofing
15+ Years of Waterproofing Expertise
Waterproofing Lower Mainland roofs since 2010, we build moisture barriers for Vancouver and Fraser Valley climates, handling 1,200mm+ rainfall and preventing water intrusion effectively.
Certified Waterproofing Specialists
Our crews hold PAQ-S and GAF Master Elite™ certifications—earned by under 3% of contractors—ensuring advanced waterproofing, approved materials, and access to premium warranty coverage.
Comprehensive Warranty Protection
Your waterproofing system is protected for up to 15 years on both materials and labour. We stand behind our work with warranties that protect your investment and prevent costly water damage.
Advanced Waterproofing Technology
We install cutting-edge waterproofing membranes, ice-and-water barriers, synthetic underlayments, and seamless application systems designed specifically for BC’s challenging climate conditions.
When You Need Roof Waterproofing
Active Water Intrusion
- Persistent leaks during rainfall
- Water stains on ceilings or walls
- Moisture in attic spaces
- Ice dam damage and infiltration
- Pooling water on flat roof sections
Preventive Protection
- New construction waterproofing installation
- Roof replacement waterproofing upgrade
- Pre-winter preparation for rainy season
- Aging roof preventive treatment
- High-risk area reinforcement
Specialized Applications
- Flat and low-slope roof waterproofing
- Deck and balcony waterproofing systems
- Below-grade foundation waterproofing
- Commercial building envelope protection
- Multi-family building waterproofing
Climate-Specific Needs
- Coastal area salt air and humidity protection
- Mountain region snow and ice barrier systems
- Valley area thermal expansion management
- High-rainfall zone enhanced drainage
Our Professional Waterproofing Process
Comprehensive Moisture Assessment
We identify water entry points, assess waterproofing, drainage, ventilation, document moisture damage, use thermal imaging and moisture meters.
Customized Waterproofing Design
Get expert waterproofing recommendations for your roof type, climate, budget, and performance needs, including materials and warranty coverage.
Expert Installation
Certified crews install waterproofing using approved methods including preparation, membranes, flashing, drainage optimization, quality checks in 2–3 days.
Performance Verification & Documentation
We perform water testing to verify seals, inspect penetrations and transitions, register warranties and provide material specification documentation.
Waterproofing or Repair? How to Decide
- Install Waterproofing When
- Building new construction requiring protection
- Replacing roof and upgrading moisture barriers
- Experiencing chronic leak issues
- Flat roof needs membrane system
- Preventing future water damage
- Climate demands enhanced protection
- Repair Existing System When
- Damage is isolated to specific areas
- Current waterproofing is under 10 years old
- Issue involves single penetration points
- You need immediate leak stoppage
- Repair costs under 30% of waterproofing cost
Financing Made Easy for Your Roof Waterproofing
- Quality waterproofing prevents thousands in water damage repairs. We partner with trusted financing providers to offer flexible payment solutions:
- $0 down payment options
- Flexible payment terms
- Same-day approval
- Competitive rates
- No prepayment penalties
- Protect your home now, pay over time
Waterproofing Solutions Built for BC Weather
Coastal Areas (Vancouver, Burnaby, Richmond)
Heavy rain, humidity, and salt air require multi-layer waterproofing with algae-resistant membranes, marine-grade sealants, and enhanced drainage for superior moisture protection in high rainfall climates.
Fraser Valley (Surrey, Langley, Abbotsford)
Temperature swings from -10°C to +35°C require flexible waterproofing membranes that accommodate thermal expansion and contraction. We install systems that maintain seal integrity through extreme weather cycles.
Mountain Communities (Squamish, Whistler)
Heavy snow loads and freeze-thaw cycles call for ice-and-water barriers, heat trace systems, and reinforced waterproofing membranes. We install protection engineered for snow melt management and ice dam prevention.
Strata & Multi-Family Building Waterproofing Services
We collaborate with property managers, strata councils, and developers to deliver comprehensive waterproofing solutions:
- Detailed scope documentation for council approval
- Building envelope assessment and recommendations
- Resident communication and scheduling coordination
- Phased waterproofing to minimize disruption
- Budget planning and cost optimization
- Complete warranty documentation and transfer
- Preventive maintenance program development
Projects range from small townhouse complexes to 50+ unit apartment buildings and commercial properties.
Waterproofing Systems We Install
Ice-and-Water Barrier Systems
Self-adhering membrane protection for vulnerable areas including eaves, valleys, skylights, and chimneys. Prevents ice dam damage and wind-driven rain infiltration. Essential for BC mountain communities.
Synthetic Underlayment Installation
Advanced synthetic materials offering superior tear resistance, UV protection, extended exposure time, and enhanced waterproofing compared to traditional felt. Ideal for all roof types.
Flat Roof Membrane Systems
Commercial-grade waterproofing including TPO, EPDM, PVC, and modified bitumen membranes. Designed for low-slope applications with seamless installation and 15-25 year performance.
Liquid-Applied Waterproofing
Seamless waterproofing coating for complex roof geometries, penetrations, and transitions. Creates monolithic moisture barrier with excellent adhesion and flexibility.
Deck & Balcony Waterproofing
Specialized systems for walking surfaces including vinyl membranes, liquid coatings, and drainage mat systems. Protects living spaces below from moisture intrusion.
Foundation Waterproofing
Below-grade protection systems including membrane barriers, drainage boards, and sump systems. Prevents basement moisture and foundation damage.
Flashing & Penetration Sealing
Custom flashing fabrication and installation around chimneys, skylights, vents, and roof transitions. Prevents 90% of roof leaks when properly installed.
Gutter & Drainage Enhancement
Seamless gutter installation, downspout routing optimization, drainage system upgrades, and French drain integration for complete water management.
SERVICE AREA
Don’t let budget concerns delay your roofing project. We offer financing with
Frequently Asked Questions
How much does roof waterproofing cost?
What’s the best waterproofing system for BC climate?
How long does waterproofing last?
Can you waterproof an existing roof?
Will waterproofing stop my roof leak?
Do you waterproof flat roofs?
How long does waterproofing installation take?
What warranty coverage do I receive?
Get Your Free Waterproofing Assessment
Experiencing Persistent Leaks?
Professional waterproofing assessment identifies all moisture entry points and delivers permanent solutions to water intrusion problems.
Flexible Financing Available
- $0 down options with same-day approval. Protect your home from water damage now, pay over time.