Foundation Crack Repair in North Vancouver: Methods, and What Actually Fixes the Problem

First, decide whether the crack is cosmetic or structural

The single most important step happens before any resin is mixed: figuring out what the crack is telling you. A hairline crack in a poured wall from normal concrete shrinkage is a very different problem than a widening diagonal crack that traces settlement or a bowing wall pushing inward. Sealing the second kind without addressing the cause just hides it until it comes back.

We don't re-diagnose here because we've written a dedicated guide on it. If you're still trying to read your crack, start with is my foundation crack serious in North Vancouver and our overview of signs of structural problems. This page assumes you've done that and want to understand the repair methods themselves and what each one costs to run.

A quick honest note: be wary of anyone quoting a crack repair sight-unseen or over the phone. On the North Shore the fix is driven by water and soil conditions you can't see in a photo, and a real number comes after someone looks at the wall inside and out.

Injection repair: epoxy versus polyurethane

For a crack in a poured concrete wall, injection is the workhorse repair. Ports are set along the crack, the face is sealed, and a resin is pumped in under pressure until it fills the crack through the full thickness of the wall. The resin you choose is not a preference, it's a match to the condition of the crack.

• Epoxy injection is a rigid, high-strength resin. It structurally bonds the two faces of the crack back together, so cured concrete is effectively welded across the gap. We use epoxy on a stable, dry, structural crack, where the goal is to restore the wall's strength. Epoxy needs a reasonably dry crack to cure and bond properly.
• Polyurethane injection is a flexible foam that reacts with moisture and expands to fill voids. It's the right call for an actively leaking crack or a non-structural crack that still weeps after rain. Because it stays flexible, it tolerates the small seasonal movement a North Shore foundation sees without cracking the seal again. It cures fast, even in a wet crack.

In short: epoxy when the job is strength, polyurethane when the job is water. A wall that is both structural and leaking sometimes gets both. For how the wall was built in the first place, see our guide to poured concrete foundations.

Carbon-fibre and staple stitching: when the wall needs reinforcing, not just sealing

Injection fills a crack, but it doesn't add strength beyond what the concrete already had. If a wall has cracked because it's under load it can't handle, resin alone will let it crack again beside the old repair. That's when we reinforce.

• Carbon-fibre reinforcement bonds high-strength fabric or straps across the crack and up the wall face. It resists the wall flexing or bowing further and is a clean, low-profile fix for a wall that has started to move but hasn't moved far.
• Stitching (staples / carbon staples) sets reinforcement across the crack itself to lock the two sides together against shear, often combined with injection so the crack is both bonded and reinforced.

These methods have a limit. They stabilize a wall that's early in the process; they are not a fix for a wall that's already significantly bowed or leaning. If yours has visible inward deflection, read bowing basement foundation walls in North Vancouver before assuming a strap will hold it. Reinforcement is engineered work, and for anything beyond a minor crack we bring an engineer in to specify it.

Exterior excavation and waterproofing membrane: the serious-case repair

Some cracks can't be reliably solved from the inside. If a crack is wide, water is under real hydrostatic pressure against the wall, or the crack ties into a bigger drainage failure, we excavate the outside of the foundation down to the footing, clean and repair the crack from the exterior, apply a waterproofing membrane, and restore the drainage and backfill.

This is the most involved crack repair, but on the North Shore it's often the honest one. Homes on North Vancouver and West Vancouver slopes sit on rocky, bedrock-heavy lots where rain sheets down the hill and water tracks along the rock straight into the foundation. Freeze-thaw at higher elevations like Grouse, Edgemont and the British Properties works cracks wider each winter, and our rainfall keeps the soil saturated for months. Sealing a leak from the inside while the outside stays under a wall of wet soil is a losing battle. Exterior work also lets us fix the perimeter drainage that caused the crack, not just the crack.

When injection isn't the answer at all

Injection and reinforcement repair a wall that is fundamentally sound. They do nothing for a foundation that is failing because the ground under it moved. If cracks come with sloping floors, sticking doors, or a wall that keeps cracking in new places, the problem is below the wall, not in it.

• If the footing has settled and the house is dropping, the fix is underpinning to carry the load down to stable soil or bedrock, not filling the cracks the settlement caused.
• If the floors are the symptom, see sloping and sagging floors in North Vancouver.
• If a wall is failing along its length rather than at a single crack, replacement of that section may be more honest than repeated patches. See foundation replacement.

This is exactly why we start with an assessment. Filling a crack that's a symptom of settlement wastes your money and buys nothing. A free structural assessment tells you which category you're actually in before anyone quotes a repair.

What drives foundation crack repair cost on the North Shore

We won't put a number on your crack from a web page, and you should distrust anyone who does. What we can tell you honestly is what moves the price, so you can read a quote and understand it:

• Method. Interior injection is the least involved. Carbon-fibre or stitching adds material and engineering. Exterior excavation and membrane is the most, because it involves digging, drainage, and restoration, not just resin.
• Access and site. Steep North Shore lots, tight side yards, decks, retaining walls and mature landscaping over the foundation all raise the cost of getting to the wall from outside.
• Water. An actively leaking crack under hydrostatic pressure needs more than a dry hairline, and often needs the drainage addressed.
• Cause and engineering. Anything structural means an engineer's involvement and, for most work beyond a cosmetic seal, a permit from the District or City. That's a feature, not a cost to dodge, it's what makes the repair defensible when you sell.

For the full qualitative breakdown across all foundation work, see foundation repair cost. When you're ready to fix it, our foundation repair service and broader structural repair work is the team that does it, and you can start with a free structural assessment or reach us on our contact page.

Frequently asked questions

Can I just inject epoxy into a foundation crack myself?

You can seal a minor cosmetic shrinkage crack with a DIY kit, and it may hold. The risk is using injection on a crack that's actually structural or actively moving. Epoxy needs a dry crack to bond, and it adds no strength to a wall that's failing. If the crack is widening, leaking, or paired with sloping floors, have it assessed first so you're fixing the cause, not hiding it.

Should I use epoxy or polyurethane on my crack?

Epoxy is a rigid structural bond for a stable, dry crack where the goal is restoring the wall's strength. Polyurethane is a flexible foam for an actively leaking or wet crack that needs a watertight, movement-tolerant seal. Structural equals epoxy; water equals polyurethane. A crack that's both may get both. The choice should follow a diagnosis, not a guess.

Will crack injection stop my basement leaking for good?

For an isolated crack with sound drainage, yes, polyurethane injection can permanently seal it. If the leak is driven by hydrostatic pressure from saturated North Shore slopes or a failed perimeter drain, an interior seal often just moves the water somewhere else. In those cases exterior excavation and a waterproofing membrane, plus fixing the drainage, is the lasting repair.

When does a crack mean I need underpinning instead of a repair?

When the crack is a symptom of the foundation settling rather than the wall itself cracking. Tell-tale signs are cracks that keep reappearing in new spots, sloping floors, and sticking doors alongside the wall cracks. Underpinning carries the load down to stable soil or bedrock. Filling the crack without addressing settlement wastes money because the movement continues.

Do I need a permit and an engineer to repair a foundation crack in North Vancouver?

A minor cosmetic seal usually doesn't. Anything structural, reinforcement, underpinning, or exterior work, is engineered work that typically involves an engineer's specification and a permit from the District or City of North Vancouver. That's a good thing: it means the repair is documented and defensible when you sell, and it keeps the fix matched to what the wall actually needs.