Foundation Crack Repair
Kamloops, BC
Permanent foundation crack repair. Polyurethane injection, epoxy repair, and exterior waterproofing to stop water infiltration at the source — no excavation in most cases.
Foundation Cracks and What to Do About Them
Foundation cracks are one of the most common causes of wet basements in this region. The freeze-thaw cycles here — temperatures swinging dramatically between winter lows and summer highs — cause soil expansion and contraction that stresses foundation walls year after year. The result is cracks that allow water in during spring snowmelt and heavy rain.
Not every crack is an emergency. A hairline crack that is dry and stable is usually cosmetic. But a crack that is actively leaking, growing wider, or showing a pattern like stair-stepping in block walls — that is a problem that will not fix itself. And the longer you wait, the more water damage accumulates in your basement: mold, rot, damaged finishes, and compromised air quality.
We use professional-grade polyurethane and epoxy injection systems to permanently seal foundation cracks from the interior — no excavation required in most cases. Our repairs are backed by a written warranty and are far more durable than anything you will find at a hardware store.
Flexible foam that seals leaking cracks and accommodates minor foundation movement
Rigid structural repair for non-leaking cracks requiring strength restoration
Full excavation and exterior membrane for severe or recurring cracks
Warranty on Injection
Repaired from Interior
Years of Experience
Cracks Sealed Annually
Not All Cracks Are the Same — Here Is What Each Type Means
The shape, direction, and location of a foundation crack tell us a lot about what caused it and how urgent the repair is. Understanding the difference helps you know when to call us immediately and when monitoring is reasonable.
Here are the four most common crack types we see in local homes, what causes them, and what they mean for your foundation:
Vertical Cracks
The most common type — usually caused by concrete shrinkage during curing or minor settlement. Vertical cracks that are narrow (under 1/8 inch) and dry are typically not structurally concerning. But if they are widening, leaking, or longer than 2 feet, they need professional sealing.
Repair: Polyurethane injection if leaking; epoxy if dry and structural.
Monitor if narrow and dry. Repair if leaking or widening.
Horizontal Cracks
These are the most serious type. Horizontal cracks in block or poured concrete walls indicate lateral pressure from soil — often from hydrostatic pressure during spring snowmelt or poor drainage. The wall is literally being pushed inward.
Repair: Carbon fiber straps, wall anchors, or exterior excavation with reinforcement.
Call us immediately. This is a structural concern.
Stair-Step Cracks
Found in block foundations, these follow the mortar joints in a stair-step pattern. They indicate differential settlement — one part of the foundation is sinking faster than another. Common in homes built on clay-heavy soils or where drainage is poor.
Repair: Epoxy injection plus assessment of underlying drainage and settlement cause.
Professional assessment needed. May indicate ongoing settlement.
Diagonal Cracks
Diagonal cracks usually run from a corner at roughly 30–45 degrees. They indicate differential settlement or corner lifting from frost heave. The direction of the crack tells us which corner is settling or heaving.
Repair: Injection plus assessment of soil conditions and drainage.
Schedule an assessment. Often related to drainage issues.
If you are unsure what type of crack you have, send us a photo — we can usually identify the pattern and give you an honest assessment of urgency over the phone. For cracks that are actively leaking or wider than a pencil eraser, we recommend an in-person assessment.
Injection ports installed along a foundation crack — the repair seals from the inside out
Repair Methods — Which One Is Right for Your Crack?
We use three main approaches for foundation crack repair, and the right one depends on the crack type, whether it is leaking, and whether structural reinforcement is needed. Here is how they compare:
About 85% of the cracks we repair are handled with interior injection — it is the least invasive, most cost-effective, and permanently effective approach for the majority of foundation cracks.
| Method | Best For | Cost Range | Time | Warranty |
|---|---|---|---|---|
| Polyurethane Injection | Leaking cracks, most vertical cracks | $500–$1,500 | 1–3 hours | 10 years |
| Epoxy Injection | Dry structural cracks, strength restoration | $600–$1,800 | 2–4 hours | 10 years |
| Carbon Fiber Straps | Horizontal cracks, bowing walls | $2,000–$5,000 | 1 day | 20 years |
| Exterior Excavation | Severe cracks, exterior wall damage | $3,000–$8,000 | 1–2 days | 20 years |
Foundation crack repair requires the right method for the right crack. If you are unsure which approach your home needs, an experienced Plumber in Kamloops team can assess the crack type, check for active leaks, and recommend the most effective permanent solution.
Polyurethane injection in progress — the foam expands to fill the entire crack depth from interior to exterior
What Causes Foundation Cracks in This Region?
Foundation cracks do not appear randomly. They are caused by specific forces acting on your foundation over time. Understanding the cause helps us recommend the right repair and, just as importantly, the right prevention.
Here are the five most common causes we see in Kamloops and the surrounding area:
Freeze-Thaw Cycles
The most significant factor here. Soil expands when frozen and contracts when thawed. This seasonal swelling and shrinking exerts tremendous pressure on foundation walls — especially in late winter and early spring when temperatures fluctuate daily. Over years, this repeated stress causes cracks to form and widen.
Hydrostatic Pressure
When soil around your foundation becomes saturated — from spring snowmelt, heavy rain, or poor drainage — water exerts pressure against the foundation walls. This pressure can force water through existing cracks and, in severe cases, cause new cracks to form. Homes without functioning perimeter drains or with clogged weeping tile are most at risk.
Concrete Shrinkage
Newer homes (under 10 years) often develop hairline cracks as the concrete cures and shrinks. These are typically vertical, narrow, and non-structural. They are not an immediate concern unless they widen or begin leaking. Sealing them early prevents water from entering and causing future problems.
Soil Settlement
If the soil beneath part of your foundation compacts or erodes more than the surrounding area, that section of the foundation sinks. This differential settlement creates stress cracks — often diagonal or stair-step patterns. Poor compaction during original construction, tree root desiccation, or water erosion can all cause settlement.
Tree Root Pressure
Large trees near the foundation send roots in search of moisture. As roots grow, they exert lateral pressure on foundation walls and can displace soil beneath footings. The result is cracking, often near the side of the home where the tree is located. Poplar, willow, and elm trees are particularly aggressive.
The right repair addresses the crack itself. But the best long-term solution also addresses the cause. That is why we always assess drainage, grading, and soil conditions around your foundation — not just the crack in the wall. A sealed crack with poor drainage will eventually lead to new cracks nearby.
Exterior excavation and waterproofing — the permanent solution for severe or recurring foundation cracks
Why Hardware Store Products Do Not Work — and What Actually Does
It is tempting to grab a tube of hydraulic cement or a DIY epoxy kit from the hardware store. They are cheap, readily available, and the packaging promises a permanent seal. But here is the reality: these products fail because they do not address the actual problem.
Here is what happens with each common DIY approach, and why professional injection is the only permanent solution:
Hydraulic Cement
Only seals the surface. It does not penetrate the crack depth, so water continues to flow behind it. Within 1–3 years, the cement pops off or new cracks form beside it.
Temporary at best. Often makes the problem worse by trapping water.DIY Epoxy Kits
Consumer-grade epoxy is low-viscosity and does not flow into hairline sections of the crack. Without professional injection pressure, the epoxy only fills the widest part of the crack, leaving gaps.
Partial seal that fails when the foundation moves or water finds the gap.Caulk or Sealant
Flexible sealants are not designed for foundation applications. They adhere poorly to damp concrete, do not withstand hydrostatic pressure, and degrade within months.
Complete waste of time and money. Will not stop active leaks.Interior Paint or Waterproof Coating
These products are vapor barriers, not waterproofing. They slow moisture but do not stop pressurized water. When water builds up behind the coating, it bubbles, peels, or forces new pathways.
Cosmetic only. Hides the problem while it gets worse behind the wall.Why Professional Injection Works
Professional polyurethane injection uses high-pressure equipment to force foam into the entire crack depth — from the interior face to the exterior face. The foam expands to 20–30 times its liquid volume, filling every void. It bonds to damp concrete, remains flexible, and creates a seal that moves with the foundation. That is why we can offer a 10-year warranty — because the repair is genuinely permanent.
The cost of repeated DIY attempts — plus the water damage that accumulates while you are trying — usually exceeds the cost of professional repair. And professional repair comes with a warranty, documentation for your home records, and the peace of mind that the problem is actually solved.
Repair or Monitor? Here Is Our Honest Framework
Not every crack needs immediate repair. Some are genuinely cosmetic and stable. But the cost of guessing wrong — water damage, mold, structural issues — is high enough that we recommend erring on the side of caution. Here is how we think about it:
Repair Now When...
Monitor for Now When...
Even cracks that are "monitor for now" should be sealed preventatively if you are finishing the basement or storing valuables. A $500 injection today prevents a $5,000 mold remediation project later. We offer free assessments so you can make an informed decision with no pressure.
After repair — the crack is permanently sealed and the wall is ready for finishing
Written Warranty on Every Repair
10-year warranty on interior injection repairs. 20-year warranty on exterior excavation and membrane repairs. We stand behind our work because we do it right.
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Foundation Crack Questions — Answered Honestly
Book a Free Foundation Crack Assessment
We provide free on-site assessments for foundation cracks. No obligation, no pressure — just an honest evaluation and a detailed quote. Call (778) 928-7586 or submit a request below.
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