Coastal Rain Doesn't Forgive Small Gaps
The Lower Mainland's rain volume punishes any weak point in a roof system — a slightly under-sealed valley, an aging membrane seam, a walking deck without proper slope. Waterproofing is about closing those gaps proactively, before they turn into an active leak and interior damage.
We work on sealed roof decks, walkable rooftop patios, valleys, parapet walls and penetrations, using membrane systems and flashing details built specifically for sustained coastal exposure — not just a coat of sealant over the problem.
Waterproofing That Solves The Actual Problem
We diagnose the real water path first, then seal it at the source.
- Membrane sealing & repair for flat sections, valleys and walking decks using fully-adhered waterproof membranes.
- Flashing upgrades at parapets, walls and penetrations — the points where most waterproofing failures actually start.
- Drainage correction so water is directed off the roof rather than pooling against a seal over time.
- Preventive sealing for roofs approaching the end of their membrane life, before a leak forces an emergency repair.
How Roof Waterproofing Works
Leak Path Diagnosis
We trace where water is actually entering, which is often not where the stain appears.
Surface Prep
The affected area is cleaned, dried and repaired so the new membrane bonds properly.
Membrane & Flashing Application
Waterproof membrane and upgraded flashing installed at every vulnerable point.
Drainage & Final Check
We confirm water is draining correctly, not just sealed, before calling the job done.
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Questions About Roof Waterproofing
A repair typically fixes a specific, already-failed spot. Waterproofing is broader — sealing valleys, penetrations and membrane seams proactively so multiple weak points get addressed before they become active leaks.
Yes — walkable roof decks and patios need the same membrane and flashing attention as any flat roof section, plus a durable wearing surface on top.
In most cases yes, once we've correctly identified the entry point. If the underlying deck has rot, that gets repaired first so the new membrane has something sound to bond to.
A properly installed membrane typically holds for 10–15+ years, though we recommend a periodic inspection to catch any UV or seam wear before it becomes a leak.
Worried About A Roof That's Started To Leak?
Get a free inspection and a straight answer on what it needs.
What Lower Mainland Homeowners Say
Real, verified reviews pulled live from our Google Business Profile.